SFLC-Std-Spec-6310-(2020) - Requirements for Preservations of Ships Structures.pdf

SFLC STANDARD SPECIFICATION 6310

2020 1 6310

REQUIREMENTS FOR PRESERVATION OF SHIP STRUCTURES

1. SCOPE

1.1 Intent. This Standard Specification describes requirements applicable to preservation of Coast Guard ship structures.

1.2 Appendices.

PROCESS STANDARD APPENDIX

Cutter & Boat Exterior Painting Systems A

Cutter & Boat Interior Painting Systems B

Cutter & Boat Authorized Coatings C

New Construction Requirements D

Coatings QA Forms (QA-1 thru QA-5) E

1.3 Acronyms and term definitions.

Critical-coated surfaces: Areas where premature failure of the coating system cannot be detected by routine observation due to inaccessibility, or areas where restoration of a failed system cannot be undertaken without laying up the ship at an industrial facility or a forward repair site; or areas where restoration of a failed system may subject a vessel to a loss of operational days, in addition to resulting in avoidable repair costs. The absence of the critical- coated surfaces designation in the individual work items does NOT downgrade, diminish, or relax the critical-coated surface protocols for established list defined within SFLC Std Spec 0000. The list of “Critical- coated surfaces” will always be treated as critical-coated surfaces as set forth in the applicable sections of this standard. Individual work items may place the critical- coated surface protocols on additional surfaces.

Partial Preservation: Surface preparation and coating application accomplished for up to 33% of a ship component (e.g., tank, u/w body, freeboard, main deck, grid cooler, crane, davit, etc...). This may also include an additional finish coat over 100% of the component - for aesthetic purpose. In-process QC measures are applicable for partial preservation of surfaces defined as "critical-coated surfaces" (see paragraph 3.2.4.2 (In-process QC measures for “critical-coated surfaces”) of SFLC Std Spec 0000).

Touch-up: Preservation operations on cumulative surface areas less than 10 percent of the total area (e.g., bilge, tank, space, etc.) being preserved, with no individual area greater than 10 square feet. Included under touch-up operations are new and disturbed surfaces of less than 10 square feet. Except for potable water, reserve feedwater, or freshwater drain collecting tanks, the documentation requirements for critical-coated surfaces are waived for these touch-up areas, and the requirements for cleanliness, surface preparation, surface profile, conductivity/chloride measurement, and coating inspection consisting of dry film thickness (DFT), holidays, and cleanliness shall be verified by the accomplishing activity prior to paint applications.

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2. REFERENCES

COAST GUARD DRAWINGS

None

COAST GUARD PUBLICATIONS

Coast Guard Commandant Instruction (COMDTINST) M10360.3 (series), Coatings and Color

Manual

Surface Forces Logistics Center Corrosion Prevention and Control (CPAC) Program Process Guide, CGTO PG-85-00-60-S (SFLC CPAC Program PG), 3 January 2013

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), Latest Edition, General Requirements

OTHER REFERENCES

ASTM International (ASTM) A153/A153M, 2009, Standard Specification for Zinc Coating (Hot-

Dip) On Iron And Steel Hardware, Coatings, Zinc, Galvanized Coatings, Steel Hardware, Zinc

Coated, Steel

ASTM International (ASTM) A1059/A1059M, 2008 (Reapproved 2013), Standard Specification for

Zinc Alloy Thermo-Diffusion Coatings (TDC) on Steel Fasteners, Hardware, and Other

Products, Coatings, Zinc, Fasteners

ASTM International (ASTM) B117, 2011, Standard Practice for Operating Salt Spray (Fog)

Apparatus

ASTM International (ASTM) B633, 2015, Standard Specification for Electrodeposited Coatings of

Zinc on Iron and Steel

ASTM International (ASTM) D522/D22M-17, 2013, Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings

ASTM International (ASTM) D2794, 1993 (Reapproved 2010), Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)

ASTM International (ASTM) D4060, 2014, Standard Test Method for Abrasion Resistance of

Organic Coatings by the Taber Abraser

ASTM International (ASTM) D4285, 1983 (Reapproved 2012), Standard Test Method for Indicating

Oil or Water in Compressed Air

ASTM International (ASTM) D4414, 1995 (Reapproved 2013), Standard Practice for Measurement of Wet Film Thickness by Notch Gages

ASTM International (ASTM) D4417, 2014, Standard Methods for Field Measurement of Surface

Profile of Blast Cleaned Steel

ASTM International (ASTM) D4541, 2017, Standard Test Methods for Pull-Off Strength of Coatings

Using Portable Adhesion Testers

ASTM International (ASTM) D5162, 2015, Standard Practice for Discontinuity (Holiday) Testing of

Nonconductive Protective Coating on Metallic Substrates

ASTM International (ASTM) D7091, 2013, Standard Practice for Nondestructive Measurement of

Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals

ASTM International (ASTM) F718-07, 2007 (Reapproved 2017), Standard for Shipbuilders and

Marine Paints and Coatings Product/Procedure Data Sheet

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ASTM International (ASTM) G32, 2016, Standard Test Method for Cavitation Erosion Using

Vibratory Apparatus

ASTM International (ASTM) G154, 2016, Standard Practice for Fluorescent Ultraviolet (UV)

Lamp Apparatus for Exposure of Nonmetallic Materials

CID A-A-50433, Aug 1989, Grease, Sea Water Wash Resistant

CID A-A-59316, Feb 1999, Abrasive Materials; For Blasting

FED SPEC TT-P-28H, Jun 2007, Paint, Aluminum, Heat Resisting

SAE AMS-STD-595, Feb 2017, Colors Used in Government Procurement International Standard

Organization (ISO) 8502-9, 1998, Field Method for the Conductometric Determination of

Water-Soluble Salts

MIL-A-22262B w/ Amendment 2, Mar 1996, Abrasive Blasting Media Ship Hull Blast Cleaning

MIL-PRF-9954D, Feb 2014, Glass Beads: For Cleaning and Peening

MIL-PRF-16173E w/ Int. Amendment 1, Sep 2006, Corrosion Prevention Compound, Solvent

Cutback, Cold-Application

MIL-PRF-23236D, Sep 2009, Coating Systems for Ship Structures

MIL-PRF-24176C, Oct 2004, Cement, Epoxy, Metal Repair and Hull Smoothing

MIL-PRF-24596B w/ Amendment 1, Feb 2011, Coating Compounds, Non-flaming, Fire-

Resistant MIL-DTL-24607B w/ Amendment 2, Sep 2013, Enamel, Interior, Non-flaming

(Dry), Chlorinated Alkyd Resin, Semigloss

MIL-PRF-24635E, Sep 2009, Coating Systems, Weather-Resistant, Exterior Use MIL-PRF-

24647E, Apr 2013, Paint System, Anticorrosive and Antifouling, Ship Hull

MIL-PRF-24667C, May 2008, Coating System, Non-Skid, for Roll, Spray, or Self-Adhering

Application

MIL-PRF-81309G, Jul 2014, Corrosion Preventive Compounds, Water Displacing, Ultra-Thin

Film MIL-PRF-24712B, Feb 2014, Coatings, Powder

Naval Sea Systems Command Naval Ship’s Technical Manual (NSTM) Chapter 634 Vol. 1, Rev.

4, Jan 2009, Deck Coverings, General (S9086-VG-STM-010)

The Society for Protective Coatings (SSPC) Paint Application Specification No. 1 (SSPC-PA 1), 2016, Shop, Field, and Maintenance Painting of Steel

The Society for Protective Coatings (SSPC) Paint Application Specification No. 2 (SSPC-PA 2), 2015, Measurement of Dry Coating Thickness with Magnetic Gages

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 1 (SSPC-SP

1), 2015, Solvent Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 2 (SSPC-SP

2), 2004, Hand Tool Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 3 (SSPC-SP

3), 2004, Power Tool Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP 5/NACE No. 1, 2007, White Metal Blast Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP 6/NACE No. 3, 2007, Commercial Blast Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP 7/NACE No. 4, 2007, Brush-Off Blast Cleaning

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The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP 7/NACE No. 4, 2007, Brush-Off Blast Cleaning, Recommended Guidelines for Evaluating Flash Rust

The Society for Protective Coatings (SSPC)/NACE International (NACE), Joint Surface

Preparation Standard SSPC-SP 10/NACE No. 2, 2007, Near-White Blast Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 11 (SSPC-SP

11), 2013, Power Tool Cleaning to Bare Metal

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP 14/NACE No. 8, 2007, Industrial Blast Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No.15 (SSPC-SP

15), 2013, Commercial Grade Power Tool Cleaning

The Society for Protective Coatings (SSPC) Surface Preparation Specification No. 16 (SSPC-SP

16), 2010, Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless

Steels, and Non-Ferrous Metals

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP WJ-1/NACE WJ-1, 2017, Water Jet Cleaning of Metals –

Clean to Bare Substrate

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP WJ-2/NACE WJ-2, 2017, Water Jet Cleaning of Metals –

Very Thorough Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP WJ-3/NACE WJ-3, 2017, Water Jet Cleaning of Metals –

Thorough Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface

Preparation Standard SSPC-SP WJ-4/NACE WJ-4, 2017, Water Jet Cleaning of Metals –

Light Cleaning

The Society for Protective Coatings (SSPC) VIS 1, 2002, Guide and Reference Photographs for

Steel Surfaces Prepared by Dry Abrasive Blast Cleaning

The Society for Protective Coatings (SSPC) VIS 3, 2004, Guide and Reference Photographs for

Steel Surfaces Prepared by Power and Hand Tool Cleaning

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Standard VIS 4

/NACE VIS 7, 2001, Guide and Reference Photographs for Steel Surfaces Prepared by

Water Jetting

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Standard VIS 5

/NACE VIS 9, 2001, Guide and Reference Photographs for Steel Surfaces Prepared by Wet

Abrasive Blast Cleaning (SSPC-SP 6/NACE No. 3) and Near-White Blast Cleaning (SSPC-

SP 10/NACE No. 2).

The Society for Protective Coatings (SSPC) QP 1, 2012, Standard Procedure for Evaluating

Painting Contractors (Field Application to Complex Industrial Structures)

The Society for Protective Coatings (SSPC) Paint Application Guide No. 11, 2008, Protecting

Edges, Crevices, and Irregular Steel Surfaces by Stripe Coating

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3. REQUIREMENTS

3.1 Preservation requirements - general. The Contractor shall abide by the requirements, contained herein, in addition to all other requirements that are specified in individual work items in the specification package, for all work involving surface preparation and coating application

3.1.1 Authorized coating systems. When guidance for surface preparation and coating application tasks is not provided in a work item, standard specification, or any other forms of contract document, the Contractor shall select applicable surface preparation methods and coating systems for exterior and interior shipboard surfaces in accordance with Appendix A (Cutter and Boat Exterior Painting Systems) and Appendix B (Cutter and Boat

Interior Painting Systems), respectively. In addition, select “Option I" systems, as applicable, from the above-mentioned appendices, unless otherwise designated by the Contracting Officer (KO).

3.1.1.1 Brand name and color compliance. Ensure that all contractor-furnished coatings and selected colors, are in conformance with Appendix C (Authorized Coatings for Use on Cutters and Boats) and the Coatings and

Color Manual, COMDTINST M10360.3 (series) – Chapter 5, Cutter and Boat Colors Exterior and Interior, respectively, unless a waiver has been granted (in writing) by the KO, or otherwise expressly specified in a work item.

NOTE

New construction requirements for prevention of corrosion and coatings preservation on CG vessels can be found in Appendix D.

3.1.1.2 Material receipt conformance. Ensure that all procured coating-related materials are delivered to the job site in original and unopened containers, with the following information/documentation:

Product manufacturer’s name.

Product’s name or number.

Batch number.

Date of manufacture.

Shelf life.

Product data sheets or ASTM F718 sheet.

Material Safety Data Sheet (MSDS).

Certificate of Compliance (COC).

3.1.1.3 Document submission.

3.1.1.3.1 For all work involving coatings preservation, ensure the following documentation, broken out by work item, is submitted to the Contracting Officer’s Representative (COR) at the Arrival Conference for each coating system intended to be applied:

Brand name.

Color.

Intended mil(s) thickness.

Time between coats.

Intended final cure time prior to immersion or full duty rating, as applicable.

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3.1.1.3.2 For all work involving coatings preservation, submit all product data sheets, MSDS, and COC to the COR, prior to commencement of work.

3.1.1.3.3 For preservation of “Critical-coated surfaces”, submit the completed QA inspection forms (QA-1 through QA-5) provided in Appendix E, as specified in SFLC Std Spec 0000.

3.1.1.4 Material storage, handling, mixing, and application. Observe all coating manufacturers’ recommended procedures, as well as the good painting practice recommendations outlined in SSPC-PA 1, for all aspects involving storage, handling, mixing, and application of paint materials.

3.1.2 Personnel health and safety compliance. In addition to the safety requirements specified in paragraph

3.3.1 (Personnel safety and property protection - general) of SFLC Standard Specification 0000, observe all personnel safety protective measures applicable to surface preparation and application of marine coatings, as specified in the coating manufacturer’s product data sheets and MSDS.

3.1.3 Substrate contamination prevention. Take extreme care to prevent contamination of prepared surfaces by materials, personnel, and equipment. The Contractor shall provide any required material and equipment

(such as disposable boot covers, disposable coveralls, and disposable gloves) to CG personnel conducting coating preservation inspections to safeguard the substrate from contamination.

3.1.4 Ambient condition parameters. Ensure that the following ambient condition parameters are strictly adhered to, as applicable, unless otherwise allowed by particular coating system manufacturers:

Coating materials must be maintained at a temperature range of 65°F to 85°F, at all times.

Work surface and surrounding temperature must be between 50°F and 90°F, for water-thinned coatings, and 35°F and 95°F for other coatings.

Coatings must not be applied when the temperature is expected to drop below freezing or below the minimum cure temperature of the applied coating before the coatings cure.

Relative humidity must be less than or equal to 50 percent for confined spaces such as forepeak compartments, tanks, and voids; and not more than 85 percent for all other open areas.

Coatings shall only be applied only when surfaces are completely dry, and surface temperature is at least 5°F above the dew point.

NOTE

Some authorized coatings – for example, the Bilge Epoxy Coating Systems listed in

Appendix C - have no dew point restrictions, consequently they may be applied at relative humidity between 10 and 100 percent.

3.1.5 Tenting and ambient condition control.

3.1.5.1 When the ambient condition parameters necessary for full paint cure or to meet environmental conditions, as required in paragraph 3.1.4 (Ambient condition parameters), cannot be met, provide the following, at no additional cost to the Government:

Suitable tenting, as applicable, for exterior surface preservation.

Suitable ambient condition control equipment, which may include, but not be limited to the below-listed, to create and maintain ambient conditions recommended by the coating system’s

2020 6 6310 manufacturer, and facilitate successful coating application and curing.

AC system.

Heaters.

Blowers.

Dehumidifiers.

3.1.5.2 Submit an ambient condition control plan to the COR within 24 hours prior to initiating ambient condition control process

3.1.6 Pre-surface preparation requirements. Prior to beginning all surface preparation procedures, accomplish the following tasks:

3.1.6.1 Compressed air cleanliness check. Check the cleanliness and suitability of the compressed air for all blasting operations, in accordance with ASTM D4285, at the following instances, and when requested by the

Coast Guard Inspector:

Prior to the start of blasting operations.

When blasting operations have been suspended for a period of time that would permit a temperature change of the compressed air and drier systems.

When an equipment malfunction or improper performance is suspected.

3.1.6.2 Coupon test. In order to ensure production of required surface profile, the Contractor shall accomplish the following tasks whenever abrasive blasting is required in a work item:

3.1.6.2.1 Conduct a performance test on all abrasive blasting operations on a Contractor-provided test coupon, prior to starting abrasive blasting operations on the vessel. Use a new metal plate, of the same metal type and material properties as the area to be blasted, steel or aluminum plate, as applicable. For steel plates, the new plate shall have the mill scale intact and the plate will be in a Rust Grade “A” condition, per the SSPC-VIS 1 visual standard cards. No existing anchor profile, other than the surface irregularities from the manufacturing process are permitted on the test coupon. The test coupon shall be flat, with nothing welded to the side used for the anchor profile test, no thinner than a 1/8-inch plate and measuring no smaller than 1-foot by 1-foot. The test coupon shall be affixed so as to not permit excessive movement during the performance test.

CAUTION

Do not affix the coupon to the vessel nor shall the blast media from the performance test strike the vessel during the test.

3.1.6.2.2 Ensure that the abrasive blasting operation test on the test coupon is with the very same setup that will be used to blast the vessel. The setup shall include, but no be limited to:

The abrasive media to be used (material and media size)

Nozzle size and type (straight bore, high velocity nozzle, angle nozzle…)

Delivery rate and pressure settings.

Blast a one-square foot area on one side of the test coupon to the abrasive surface preparation standard specified in the applicable work item and perform an anchor profile test of the blasted surface in accordance with ASTM D4417, method B or C. Notify the COR in advance of the abrasive blasting operation test, to permit the witnessing of the test by appropriate Coast Guard personnel. Submit a Condition Found Report

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(CFR) documenting the results of the abrasive blasting operation test. CFR shall include at a minimum, the following:

Area of the vessel for which the verified setup is applicable.

The abrasive media use.

The nozzle size and type.

The delivery rate and pressure.

The test coupon starting properties (material type and surface conditions).

The resultant anchor profile readings from the test.

NOTES

1. Ultra-high pressure waterjetting does not create an anchor profile and is exempt from the anchor profile test coupon check.

2. The reverse side of the test coupon may be used for the subsequent test, provided that the conditions in paragraph 3.1.6.2 (Coupon test) are met.

3.1.6.2.3 Repeat the abrasive blasting operation test in the following instances:

The setup, as defined in paragraph 3.1.6.2.2, is changed

The resultant anchor profile readings observed on the vessel are outside the specified anchor profile range

Media is changed from MIL-A-22262 to CID A-A-59316 or vice versa

The supplier of the abrasive blasting media changes, regardless if the new source for the media has the same specifications

When directed by the COR

NOTE

A performance test of the abrasive blasting operations on a test coupon and measuring the anchor profile prior to performing the operation on the cutter, in order to confirm that the anchor profile range that the operation is going to produce. An abrasive blasting operation test is prudent, as there are enough variables in the equipment setup and media properties that the resulting anchor profiles from one contractor to the next vary significantly.

3.1.6.3 Weld splatter removal. Remove all existing weld splatter, using a chipping hammer, spud bar, scraper, or grinder, as applicable.

3.1.6.4 Surface contaminant removal. Ensure that water in all surface preparation tasks, including pre-surface preparation wash and water-jetting is of sufficient purity and quality that it does not prevent the surface being cleaned from achieving the required degree of surface cleanliness or non-visible contamination criteria. Ensure that surface preparation water does not contain sediments or other impurities that are destructive to the proper functioning of the cleaning equipment.

3.1.6.4.1 Perform a low-pressure (maximum 5,000 psi) fresh water wash down of the surfaces, to remove all existing surface contaminants such as sea salts, grease and oil (hydrocarbons), loose rust, mud and marine growth, as applicable, and achieve the cleanliness requirements of SSPC-SP 1. (Do not exceed 2400 psi for

Foul Release Coatings.) Use vacuum to remove standing water followed by an adequate period of time to allow the surface to dry prior to surface preparation.

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3.1.6.4.2 When fresh water wash is not possible or practical, remove surface contaminants by one or a combination of solvent cleaning methods in accordance with SSPC-SP 1.

3.1.6.5 Preconstruction primers. Also known as shop primers, preconstruction primers are used as a temporary coating to protect steel from corrosion during welding, storage, and fabrication. Preconstruction primers shall be removed prior to applying the permanent coating system on all critical coated surfaces.

Preconstruction primers may be left in place in other interior areas (such as machinery spaces, habitability spaces, etc.) if they are intact, uncontaminated, and compatible with the overcoating system.

3.1.7 Substrate profile measurements - during and post-surface preparation.

3.1.7.1 During surface preparation by abrasive blasting or water jetting operations, spot check the existing anchor profile once per 500 square feet, in order to 'project' the need to manage the excessive anchor inspect for both excessive and insufficient anchor profiles . When the Contractor elects to prepare a substrate by water jetting, the Contractor shall inspect the substrate for areas of insufficient or excessive anchor profile, both visually and in accordance with ASTM D4417, Method B or C. Submit a CFR detailing the location, square footage, measured anchor profiles, and the anchor profile range required for the applicable coating system.

3.1.7.2 After completion of surface preparation, measure the profile of the resultant bare surfaces, in accordance with ASTM D4417, Method B or C.

3.1.8 Additional post-surface preparation requirements.

3.1.8.1 Surface cleanliness evaluation – visual standards. In the presence of the CG Inspector, verify the resultant surface cleanliness level, in accordance with the texts of the specified surface preparation standard in conjunction with associated visual/pictorial guide, as listed in Table 1 (Surface Preparation Visual

Guides).

TABLE 1 - SURFACE PREPARATION VISUAL GUIDES

SURFACE PREPARATION STANDARD VISUAL GUIDE

Dry-abrasive blast cleaning: SSPC-SP 5/NACE No. 1

SSPC-SP 6/NACE No. 3 SSPC-SP 7/NACE No. 4 SSPC-

SP 10/NACE No. 2 SSPC-SP 14/NACE No. 8

SSPC-VIS 1

Wet-abrasive blast cleaning: SSPC-SP 6/NACE No. 3

SSPC-SP 10/NACE No. 2

SSPC-VIS 5/NACE VIS 9

Hand Tool Cleaning: SSPC-SP 2. Power Tool Cleaning:

SSPC-SP 3

SSPC-SP 11

SSPC-SP 15

SSPC-VIS 3

Water Jetting:

SSPC-SP WJ-1/NACE WJ-1 SSPC-SP WJ-2/NACE WJ-2

SSPC-SP WJ-3/NACE WJ-3 SSPC-SP WJ-4/NACE WJ-4

SSPC-VIS 4/NACE VIS 7

(Still applicable, although it does not reflect latest water jetting standards)

3.1.8.2 Debris removal and disposal. Completely remove all dust and residues from the prepared surfaces

2020 9 6310 by vacuuming. Do not brush or blow down the surfaces to remove dust and residues. Dispose of generated wastes in accordance with all applicable Federal, state, and local regulations.

3.1.8.3 Surface profile measurements. Measure the profile of the resultant bare surfaces, in accordance with

ASTM D4417, Method B or C.

3.1.8.4 Soluble salt conductivity measurements. Measure and document conductivity due to soluble salts, randomly over the prepared surfaces (take 5 measurements every 1,000 square feet or five total measurements for surfaces less than 1,000 square feet), using a suitable surface contamination analysis equipment, in accordance with ISO 8502-9.

3.1.8.5 Soluble salt removal. If salt conductivity measurements exceed the respective values in Table 2

(Soluble Salt Maximum Conductivity Threshold), accomplish the following:

For surfaces prepared by abrasive-blasting, wash the affected areas with fresh water, with a maximum of 5,000 psi.

Remove all standing water, dry, and retest the affected areas. Repeat water-wash and retest until satisfactory levels are obtained.

NOTE

De-ionized water shall be used in cases where available fresh water has excessive chloride/chlorine content. A CFR will need to be submitted and approved, prior to using said water.

For surfaces prepared by water jetting, resume water jetting of affected areas. Remove all standing water, dry, and retest the affected areas. Resume water jetting and retest until satisfactory levels are obtained.

For power tool-cleaned surfaces, circle affected areas and perform spot solvent cleaning followed by retest. Repeat spot solvent cleaning and retest until satisfactory results are obtained.

For power tool-cleaned surfaces not practical for spot cleaning method, water wash said surfaces with copious amounts of fresh water, using hand scrub brush. Remove all standing water and dry the affected areas. Remove all flash rusting, if any, caused by the water wash by disk sanding affected areas with a #36 disk. Perform an SSPC-SP 1 solvent wipe on all sanded areas and retest. Repeat necessary steps until satisfactory levels are obtained.

TABLE 2 -SOLUBLE SALT MAXIMUM CONDUCTIVITY THRESHOLD

SURFACES CONDUCTIVITY

(microsiemens/cm)

Submerged 30

Non-Submerged 70

3.1.8.6 Hydrocarbon substance removal. Remove all grease and oil surface contaminants by one or a combination of solvent cleaning methods in accordance with SSPC-SP 1.

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NOTE

An ultraviolet light source may be used to detect the presence of hydrocarbons; however, for proper detection, artificial lights must be off for interior spaces, and the inspection must be conducted during darkness for surfaces exposed to sunlight. When hydrocarbons are present, the hydrocarbons will fluoresce as bright green, lime green, or blue/violet on the surface.

3.1.8.7 Flash rusting/surface oxidation limitations. Limit surfaces being preserved in size to an area that can be prepared and coated before flash rusting/surface oxidation occurs. If flash rusting or oxidation does occur before primer coat application, ensure the following:

For surfaces prepared by water jetting, the rust must be tight and adherent, and not exceed the

“WJ-2/L” (Very Thorough or Substantial Cleaning, Light Flash Rusting) or “WJ-2/M” (Very

Thorough or Substantial Cleaning, Moderate Flash Rusting) requirement as specified in

Appendix A or B, in accordance with SSPC VIS 4/NACE No.7.

A wipe test may be used in accordance with National Shipbuilding Research Program Surface

Preparation and Coatings Panel (NSRP SP-3), Recommended Guidelines for Evaluating Flash

Rust, in lieu of VIS 4/NACE No. 7, only if a letter of approval for the specific work to be accomplished is supplied from the coating manufacturer.

For surfaces prepared by methods other than water jetting, the rust or oxidation must be completely removed by abrasive-sweeping or mechanical cleaning.

3.1.9 Use of contrasting colors. Ensure that all coats in multi-coat systems, including stripe coats, are applied in contrasting colors.

3.1.10 Coating inspection. Inspect each applied paint coat to ensure that there are no misses, skips, runs, sags, overspray, under spray, dry spray, or other visible paint defects that will affect the performance of the coating system. Repair all defects.

3.1.11 Stripe coat application:

3.1.11.1 After each primer coat has sufficiently cured for overcoating, apply an un-thinned coat of the same primer coating over all weld seams, edges, and other surfaces with complex geometric shapes – including, but not limited to Foot/hand holds (including inaccessible areas, such as back side of piping, under side of I-beams), and other mounting hardware (non-flat surface)the following features in freeboard, superstructure, underwater body, and main deck surfaces, as applicable:

Bulwarks.

Ladder rungs.

Port lights.

Doubler plates.

Hawse piping.

Spray rails.

Rub rails.

Chocks and cleats.

Deck machinery and fittings.

Hull markings (i.e. draft marking, emblem locators…).

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Vents and overboard discharges.

Stiffeners, supports, and brackets.

Detacouples.

3.1.11.2 Apply stripe coating at 3 to 4 mils wet film thickness (WFT), ensuring that the coating encompasses all edges, as well as at least one-inch border outside each edge, and is neat in appearance. Minimize extra thickness applied to edges, as well as streaks and drops of paint.

3.1.11.3 For multi-coat systems with inorganic zinc as the primer coat, apply the stripe coat following the mist coat application, using the same coating used for the mist coat.

3.1.12 Antifouling coating freeboard/U/W Body interface. In order to prevent corrosion and coating delamination at the freeboard-U/W body interface, ensure the following measures are taken when both the freeboard and underwater body surfaces are being 100% preserved (see Figure 1):

3.1.12.1 Apply the Freeboard Anticorrosive System (FB AC SYS) downward to the top of the boot-topping.

The FB AC SYS consists of: 1) single coat of Zinc-Rich Primer, 2) one coat of Zinc-Rich Primer and one coat of Epoxy Primer/Midcoat, or 3) two coats of Epoxy Primer/Midcoat depending on the specified topside coating system.

3.1.12.2 Apply the first coat of the Underwater Body/Boot-top Anticorrosive Epoxy (UWB AC1) over the

FB AC SYS so that it overlaps by approximately 3-4 inches.

3.1.12.3 Apply the Freeboard Topcoat System (FB TC SYS) downward over the UWB AC1 so that it overlaps by approximately 3-4 inches to the top of the boot-topping. The FB TC SYS consists of one or two coats of Polysiloxane or Silicone Alkyd depending on the specified topside coating system.

3.1.12.4 Apply the second coat of the Underwater Body/Boot-top Anticorrosive Epoxy (UWB AC2) so that it ends at the specified top of the boot-topping and meets the FB TC SYS.

3.1.12.5 Apply the Underwater Body/Boot-top Antifouling Coating System (UWB AF SYS) over the UWB

AC2 so that it ends at the specified top of the boot-topping. The UWB AF SYS consists of one or more coats of antifouling coating as required by the specified antifouling coating system. DO NOT apply antifouling coatings BETWEEN the freeboard or underwater body anticorrosive coatings.

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FIGURE 1. ANTIFOULING COATING FREEBOARD / U/W HULL INTERFACE

Image to the left labeled “COMMON PRACTICE” is UNACCEPTABLE.

Coatings must be applied to match image on the right labeled

“REQUIREMENT” (see 3.1.12)

3.1.13 Touch-ups and minor coating repairs. When performing touch-ups or minor coating repairs, adhere to the following guidelines:

Each area identified for touch-up preservation shall include the area itself and at least an additional three inches adjacent to the area to be painted including all attached framing, stiffeners, brackets, mounting plates/frames, pad eyes, ducting, piping, equipment support, etc., as applicable.

The total area designated shall account for the three-inch boundary segment wherein the repair is faired into the surrounding intact coating system.

3.1.13.1 Prepare surfaces in which mechanical damage extends into the substrate to bare metal in accordance with SSPC-SP 11 providing a minimum 1.0 mil anchor pattern using suitable tools listed in

SSPC-SP 11. Feather surrounding intact coating into the prepared areas, to create a smooth transition. Intact coatings are considered adherent if they cannot be removed by lifting with a dull putty knife. Roughen all painted surfaces, to provide a suitable surface profile.

3.1.13.2 Abrade areas where primer coat is exposed with 100-grit paper, and feather back to firm edge of existing topcoat finish.

3.1.13.3 Perform solvent cleaning of all surfaces, in accordance with SSPC-SP 1.

3.1.13.4 Apply coatings using a hand brush, roller, or in larger areas airless-spray, to match existing adjacent areas.

3.1.13.5 Substitute epoxy or organic zinc primers for inorganic zinc primers, when available as a coating system option, for steel surfaces.

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3.1.14 Overcoating cautions. Strictly abide by coating system manufacturer’s recommendations, to ensure proper inter-coat adhesion, when performing overcoating, to ensure the following:

Overcoating window is not exceeded.

Undercoating system is properly prepared, when overcoating window is exceeded.

Rules for tie-coat application or tacky undercoating are followed, when overcoating an existing coating with a top-coating of different chemistry (e.g.: overcoating inorganic zinc with epoxy, or overcoating epoxy with antifouling top-coating).

3.1.15 Coating system tests. In addition to the coating inspection requirements specified in paragraph

3.1.10 (Coating inspection), test each applied coat at random locations, using the test methods specified in

Table 3 - Coating Test Methods.

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TABLE 3 - COATING TEST METHODS

TEST INSTRUMENT SPECIAL INSTRUCTIONS

Wet Film Thickness (WFT) Conventional Notch Type/with

“teeth” WFT gage

Refer to ASTM D4414.

Dry Film Thickness (DFT) Magnetic or Eddy Current Gauge Refer to SSPC-PA 2, for ferrous metal base; and ASTM D 7091, for non-ferrous metal base.

*Pinhole/Holiday Detection Low Voltage Holiday Detector Refer to ASTM D5162.

**Pull-off Strength of Coatings Portable Adhesion Testers Refer to ASTM D4541.

*Primer coat only (except for inorganic zinc primer coat), for “critical-coated surfaces”.

**Primer and second coats for all tank and void coatings conforming to MIL-PRF-23236, and primer coats only for all other

“critical-coated surfaces”.

3.1.16 Ventilation requirements for confined spaces. During preservation of confined spaces (confined spaces such as Forepeak Compartments, voids, tanks…), ensure that the ventilation equipment, as required in paragraph 3.3.1.1 (Temporary ventilation) of SFLC Standard Specification 0000 are in place and operating prior to the start of surface preparation, to create one complete air change every four hours. Use

“net exhaust” (negative pressure mode) ventilation when the ventilation trunk(s) run through interior compartments intended for normal human occupation such as berthing areas, passageways, and workspaces.

In addition, ensure the following:

Ventilation system remains in place and energized during the application of the coating system, from the initial coating application through the final coating application and cure.

Ventilation ductwork shall be placed at the bottom most location where vapors will accumulate in pockets and a complete exhaust of solvent vapors is achieved.

CAUTION!

Failure to maintain proper ventilation in enclosed spaces during preservation may result in solvent entrapment, which then may lead to delay in coating final cure or outright failure of coating to cure.

3.1.17 Critical drying time requirements. Ensure that all coating system cure times (including for touch-up preservation) are in accordance with manufacturer's recommendation for intended service.

3.1.17.1 Potable and feed water tank systems. For potable and feed water tanks, ensure that the coating manufacturer’s technical guidance is followed - to include but not limited to: ventilation requirements, application temperatures, thru coat times, final cure times, and hold time before placing tank into immersion service. If ventilation requirements are not provided by the coating manufacturer, the ventilation requirements in paragraph 3.1.16 (Ventilation requirements for confined spaces) shall be the minimum requirements. The Contractor shall maintain and record tank temperatures during the application of the coating system from initial coat to the final cure, applying heat as required. Ensure that ventilation is maintained from final cure thru the minimum hold time before placing the tank back in service. For touch-up preservation, abide by the coating manufacturer’s recommendations or observe the following curing requirements – whichever is more stringent:

24 hours between coats and 24 hours (@ 77°F), if the largest single touch-up area is less than one square foot, and the cumulative total touch-up area is less than four square feet.

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24 hours between coats and 48 hours (@ 77°F), if the largest single area is between one and two square feet, and the cumulative total touch-up area is less than ten square feet.

24 hours between coats and minimum seven full days (@ 77°F), if any single area is greater than two square feet.

3.1.17.2 Underwater body antifouling systems. For underwater body antifouling systems, ensure that the paint manufacturer's minimum curing time is met before the vessel is re-floated.

CAUTIONS

1. Hard cure times or cure time prior to immersion for any “critical coated system” shall be met as published on the Product Data Sheets available online.

No early undocking or relaxation of these published requirements is permitted without prior approval from the KO. Coating system manufacturer’s Sales or Technical Representatives may not relax these requirements. Painting and curing of all tank coating systems (except for tanks that are inboard and not touching the skin of the vessel (side and/or bottom) shall occur while the cutter is out of the water.

2. CAPAC systems shall not be energized until full cure of all underwater paint systems has occurred.

3.2 Preservation plan. The Contractor shall submit a “Preservation Plan” (PP) to the COR at the arrival conference, to allow for review of all work items pertaining to the preservation of the vessel. At a minimum, PP shall include the following and be broken down by work item:

Coatings to be applied – listed by manufacturer and product identification numbers

Target wet and dry film thickness values

Authorized reducers/solvents – including maximum percent by volume for reducers/solvents

Colors by SAE AMS-STD-595 color number

Application method for each coat

Application pressure and nozzle size requirements listed on the manufacturer’s product data sheet(s)

Minimum recoat windows for applying subsequent coats, maximum recoat windows to apply subsequent coats adjusted for anticipated temperatures

Any special instructions or environmental limits listed by the coating manufacturer

Intended final cure times prior to immersion or full duty rating (as applicable).

3.3 Alternative/optional coating systems. The Contractor shall be aware that the below-listed alternative/optional coating systems are authorized for use on cutters and boats. The Contractor may, via submission of a CFR, propose the use of these systems as a substitute or supplement for standard systems, as applicable, when there is a cost-savings or performance benefit.

Powder coatings.

Corrosion inhibitive thermoplastics.

Thermo-diffusion zinc coatings.

3.3.1 Powder coatings. If a Change Request for the use of powder coating has been authorized and released, or is required in a work item, the Contractor shall accomplish the following:

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3.3.1.1 Surface preparation. Abrasive-blast the designated equipment or component(s) to a “White Metal

Blast Cleaning” standard, to provide an anchor profile of 1.5-2.5 mils, in accordance with SSPC-SP

5/NACE No.1.

3.3.1.2 Coating application. Coat the prepared surfaces with a suitable powder coating, in accordance with manufacturer’s instructions. Select the applicable system, as per the following recommendations:

MIL-PRF-24712, Type IV (Polyester TGIC) coatings - for exterior applications.

MIL-PRF-24712, Type I (Epoxy) coatings - for dry interior applications.

MIL-PRF-23236, Type VIII coatings - for wet or immersion interior applications.

TABLE 4 - CANDIDATE POWDER COATING APPLICATIONS

Anchors Fire Hose Racks, Fire Extinguisher Holders

Overhead Panels

Battle Helmets First Aid Boxes Pad-eyes

Boat Booms Foundations: AFFF/PKP Perforated Plates for Hull Openings and Tank Entries

Brackets Fuel Oil Spill Kit Boxes Piping, Interior/Exterior

Bunks and Fixtures Furniture: File Cabinets Sea Chest Strainers

Chains: Safety, Anchor/Links Gun Mounts and Hardware Sea Transfer Equipment

Chocks Hand Railings Ship’s Communication

Speaker Boxes

Control Panels Hatches, Scuttles Signaling Equipment

Damage Control Equipment:

Flashlight Holders, Battle Lanterns, Pump Storage Units

Head Facilities: Medicine Cabinets, Towel Racks, Partitions, Doors, Blow Dryers

Signs: Refueling, Damage

Control, Medical, Directional

Deck Gratings * Instrument Consoles Sound Powered Telephone

Receiver Holders

Deck Hardware: Refueling Gear, Portable Booms, Underway

Replenishment Equipment

Junction Boxes Spare Parts Stored In Free

Floods

Deck Light Covers and Deflectors Ladders: Interior/Exterior, Railing and Related Hardware

Stanchions

Diesel Motor Covers Lantern Mounts Stretchers, Strokes

Doors: Watertight and Partition Light Fixtures: Interior/Exterior Swimmer’s Safety Line Reels and Bases

Drip Pans Line Reels and Cable Reels Tank Covers

Electrical Cabinets Lockers: Ammunition, Pyrotechnic, Clothing

Tool Boxes

Electrical Motor Housings Lube Oil Strainers Ventilation: Fixed Sectional and Screens

Exterior Turnbuckles (Lifeline) Mess Deck Furniture Weapons Handling Equipment

Fasteners Metal Shoring *Note: A non-ferrous, inert abrasive should be added to the powder coating for deck gratings to provide slip resistance.

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NOTES

1. Powder coating is authorized for use on exterior topside or interior applications where traditional liquid applied coating systems are difficult to maintain due to a severely corrosive environment, high wear, or abrasion. It should be noted that powder coatings are subject to chipping damage from mechanical impact. It can be difficult to repair this damage with traditional liquid coatings and achieve satisfactory cosmetic results. Powder coatings are usually applied by electrostatic spray or fluidized bed. The final step in the process involves heating in an oven at temperatures that vary, but generally range from 225oF to 350oF. The need for an oven limits the application to items that can be removed from the cutter or boat, withstand the high cure temperatures, and sizes that can be fitted in the available oven.

2. Table 4 provides a sample list of items that are candidates for the application of powder coatings.

3.3.2 Corrosion inhibitive thermoplastics. If a Change Request for the use of corrosion inhibitive thermoplastics has been authorized and released, or is required in a work item, the Contractor shall coat designated equipment or component(s) with suitable Corrosion Inhibitive Thermoplastics, in accordance with Appendix C of this Standard Specification, in accordance with the system manufacturer’s recommendations.

NOTE

Corrosion Inhibitive Thermoplastics are coatings impregnated with corrosion resistant oils that become spray-able liquids at higher temperatures

(approximately greater than 300 oF) and then set at ambient temperatures.

Corrosion Inhibitive Thermoplastics are authorized for any topside applications such as flanges or valves where there is a requirement for easy removal and access. Adhesion of the Corrosion Inhibitive Thermoplastics is dependent on attaching to physical features, i.e., the underside of bolt heads or wrapping around a flange, rather than bonding to the surface because of the impregnating oils. Use the same color for the Corrosion Inhibitive

Thermoplastic as the area that it is protecting with the exception of white where a spar color should be used instead. Authorization is limited to exterior use.

3.3.3 Thermo-Diffusion zinc coatings. If a Change Request for the use of thermo-diffusion zinc coatings has been authorized and released, or is required in a work item, the Contractor shall coat designated equipment or component(s) with a suitable thermo-diffusion zinc coating, conforming to ASTM A1059.

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Thermo-diffusion zinc coatings (Standard Specification for Zinc Alloy

Thermo-Diffusion Coatings on Steel Fasteners, Hardware, and Other

Products – ASTM A1059/A1059M) are authorized as a substitute for electrodeposited and hot-dip galvanized zinc coatings (Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel – ASTM B633 and

Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel

Hardware – ASTM A153/A153M, respectively.) Items with the applied thermo-diffusion zinc coating have been shown to provide a longer service life than electrodeposited or hot-dip galvanized parts which will reduce life-cycle costs. Thermo-diffusion zinc coatings shall not be used to replace inherently corrosion-resistant alloys, such as stainless steel or monel. This authorization is limited to application on steels having a base-metal strength <150 ksi. The thermo-diffusion zinc coating process can only be used for higher strength metals such as Grade-8 steel with specific approval from Commandant (CG-

45). The thermo-diffusion zinc coating shall not be applied to items that will be welded after the coating is applied. Because the thermo-diffusion zinc coating process involves heating of parts to 700 degrees F, all non-metallic materials (e.g., gaskets, O-rings, etc.) must be removed before coating.

Consideration must be given to impact on fit when thermo-diffusion zinc coatings are applied.

SFLC STAND SPECIFICATION 6310

2020 APPENDIX A-1 6310

APPENDIX A

CUTTER & BOAT EXTERIOR PAINTING SYSTEMS

A1. SCOPE

A1.1 Intent. This standard specification describes the required coatings for various exterior areas and components of Coast Guard cutters and boats.

A2. REQUIREMENTS

A2.1 Vessel coating systems - exterior. This appendix presents the required coatings for various exterior areas and components of Coast Guard cutters and boats. The coating systems for each area are presented in tabular form. The tables include the surface preparation, primer, intermediate coats if any, and topcoat. The various coatings used for a particular application should be regarded as a system. The coating system shall be obtained from a single manufacturer to ensure that the individual components are compatible and to maximize performance. Thickness references apply to the dried film and are abbreviated as DFT (dry film thickness).

References are by paragraph heading and include:

1. Accommodation Ladders, Wood. (See Wood, Exterior)

2. Anchors/Anchor Chains.

3. Antenna Hardware, Radio and Radar, DF Loops.

4. Bilge Keel. (See Underwater Body/Boot-Top).

5. Boat Hooks. (See Wood, Exterior).

6. Boatswain's Chairs. (See Wood, Exterior).

7. Boot-Top. (See Underwater Body/Boot-Top).

8. Collars, Boat Foam-filled.

9. Electric Cables, Armored, Exterior.

10. Fittings.

11. Flight Deck.

12. Freeboard/Superstructure/Mast.

a. Freeboard/Superstructure/Mast, Steel.

b. Freeboard/Superstructure/Mast, Aluminum or Galvanized Steel.

c. Freeboard/Superstructure/Mast, Aluminum, Unpainted.

d. Freeboard/Superstructure, Fiber Glass.

13. Gangplanks, Wood. (See Wood, Exterior).

14. Gratings, Wood. (See Wood, Exterior).

15. Inaccessible Areas.

a. Inaccessible Areas, Steel.

b. Inaccessible Areas, Galvanized Steel or Aluminum.

16. Ladders, Wooden. (See Wood, Exterior).

17. Machinery, Deck.

18. Masts. (See Freeboard/Superstructure/Mast).

19. Metal Repair and Hull Smoothing.

20. Piping, Exterior.

21. Propellers. (See Underwater Body/Boot-Top).

22. Propeller Shafts. (See Underwater Body/Boot-Top).

23. Railing, Wood. (See Wood, Exterior).

24. Rudders. (See Underwater Body/Boot-Top).

2020 APPENDIX A-2 6310

25. Sea Chests and Gratings. (See Underwater Body/Boot-Top).

26. Skegs (See Underwater Body/Boot-Top).

27. Smoke Stacks.

28. Spuds.

29. Strongbacks, Wood (See Wood, Exterior).

30. Superstructure (See Freeboard/Superstructure/Mast).

31. Transducer Hull Rings.

32. Underwater Body/Boot-top.

a. U/W Body and Boot-Top, Steel Hulls (Up to 7 Years), in Salt Water.

b. U/W Body and Boot-Top, Steel Hulls (Up to 12 Years), in Salt Water

c. U/W Body and Boot-Top, Steel Hulls, in Fresh Water

d. U/W Body and Boot-Top, Icebreaker >235'

e. U/W Body and Boot-Top, Ice Breaking Capable Vessels <235’, in Salt Water

f. U/W Body and Boot-Top, Ice Breaking Capable Vessels <235’ in Fresh Water

g. U/W Body and Boot-Top, Aluminum Hulls.

h. U/W Body and Boot-Top, Aluminum Hulls, High Speed (>30 knots).

i. U/W Body and Boot-Top, Aluminum Hulls (in waters with limited fouling).

j. U/W Body and Boot-Top, Fiber Glass Hulls (Up to 7 yrs) in Salt Water.

k. U/W Body and Boot-Top, Fiber Glass Hulls (Up to 12 yrs) in Salt Water.

l. U/W Body Appendages: High Turbulent Areas.

m. U/W Body Propellers.

n. U/W Body Propulsion Shaft Outboard Bearing Void

o. U/W Body Shafts.

p. U/W Body Sea Chest, Icebreaker in Fresh Water.

q. U/W Body Zincs.

r. U/W Body Dielectric Shield for ICCP Systems.

33. Weather Decks.

a. Weather Deck Non-Skid, Broadcast Grit for Steel.

b. Weather Deck Non-Skid, Broadcast Grit for Aluminum.

c. Weather Deck Non-Skid, MIL-SPEC Coating for Steel or Aluminum.

d. Weather Deck Slip Resistant Sheets.

e. Weather Deck, Buoy Tender Working Deck.

34. Wood, Exterior.

35. Zinc (or other Sacrificial) Anodes. (See Underwater Body/Boot-Top).