SATPC0041156 TAB 04 4 SOW.pdf
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- Solicitation number
- 80NSSC26933283Q
About this file
This is a Statement of Work (SOW) for electroless nickel (EN) coating services on optical grazing angle mandrels for NASA Marshall Space Flight Center (MSFC).
The contractor shall apply EN coating to six mandrel pieces (SHERO-M1-X-105 and SHERO-M2-X-105) and eight coupons (SHERO-MX-CX-003). The coating process must follow a specified procedure including solvent preclean, alkaline soak clean, etch, double zincate coating, strike coating (either electrolytic or electroless nickel), and final optical-grade electroless nickel deposit. The deposit must be free of pits and voids, contain a minimum of 11% phosphorus by weight, and achieve uniform thickness of 0.008 +0.003/-0.000 inches. Connection points need not be coated; blind holes and exposed threads must be plugged with stop-off coating to allow disassembly. Post heat treatment per ASTM B733 Class 4 is required at 230±10°F (not exceeding 240°F) for four hours, with time and temperature charts provided to NASA MSFC for each batch. The contractor must perform deposit hardness testing on coupons using Rockwell C scale on the back face, with results reported to NASA MSFC; acceptable hardness range is 45-52 Rockwell C. NASA MSFC will conduct government inspection including scanning electron microscope evaluation at 1000X magnification and visual inspection with 1-2 million candlepower light to identify any pitting. The contractor may propose alternative methods with supporting documentation, samples, and test results. NASA MSFC will provide aluminum plating caps, stainless steel fasteners, and fixturing hardware for each mandrel and endcap.
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SuperHERO Mandrels Electroless Nickel (EN) Coating SOW
Description
The information provided below is for the plating of optical grazing angle mandrels using an EN process. The contractor shall EN coat 6 mandrel pieces (SHERO-M1-X-105, SHERO-M2-X-105) and 8 coupons (SHERO-MX-CX-003) to meet the following requirements and quality inspections. NASA MSFC will provide the contractor with the aluminum plating caps, SS fasteners, and fixturing hardware for each mandrel and endcap.
Drawings
SHERO-M1-X-105
SHERO-M1-L-105 (qty. 1) SHERO-M1-C-105 (qty. 1) SHERO-M1-S-105 (qty. 1)
SHERO-M2-X-105
SHERO-M2-L-105 (qty. 1) SHERO-M2-C-105 (qty. 1) SHERO-M2-S-105 (qty. 1)
SHERO-MX-CX-003 (Qty. 8)
Contractor
The contractor shall use the following process or provide documentation, samples, and test results supporting an alternative method. The following process is to be used on the mandrels/coupons.
1. Solvent preclean (if necessary).1
2. Alkaline soak clean.1
3. Etch (can be acidic or basic).1
4. Double zincate coating.1
5. Strike coating can be either of the following:
a. Electrolytic nickel strike for electroless nickel applications
b. Electroless nickel strike
6. Final optical grade electroless nickel deposit must be free of pits/voids.
7. Minimum 11% phosphorus by weight electroless nickel phosphorus plating.
8. Uniform thickness of 0.008 +0.003/-.000 inches onto the mandrels/coupons.
9. Connection points need not be coated. Plug blind holes or exposed threads with stop off coating to allow disassembly after plating.
10. Post heat treatment for age hardened aluminum alloys, per ASTM B733 Class 4 – Heat treatment at 230±10°F (104-
116°C) for four hours2. Heat treatment temperature shall not exceed 240°F. Provide NASA MSFC with time and temperature chart for heat treatment of each batch.
11. Perform deposit hardness testing on coupon, and report hardness values for each coupon, using Rockwell C scale, to NASA MSFC. All measurements must be performed on the back face of coupon (the side with identification number). Range: 45-52 Rockwell C.
Government inspection and control
The following testing to be performed at MSFC:
1. It is recommended the deposit be free of pits/voids visible at 1000X or by scanning electron microscope.
2. Inspect mandrel with 1-2 million candlepower light. Record any visible pitting.
Referenced Documents:
1. Mallory, Glenn O. and Juan B. Hajdu, eds. Electroless Plating: Fundamentals and Applications. Orlando: American
Electroplaters and Surface Finishers Society, 1990.
2. ASTM B733-04 Standard Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal.
05/06/2026
File details come from the government source that posted it. Updated .