UNSPSC 12163603: Corrosion inhibitors

Corrosion inhibitors are chemical compounds that are added to liquids or gases to reduce or prevent the corrosion of metal surfaces and decreases the corrosion rate of a material, typically a metal or an alloy. Two types are Water Based Inhibitor and Oil based Inhibitor.

UNSPSC 12163603 Corrosion inhibitors (Commodity) covers chemical products that state and local governments apply to water systems, wastewater infrastructure, and metallic surfaces to prevent corrosion and extend asset life. Recent solicitations show water utilities purchasing NSF-certified liquid corrosion inhibitor formulations—chiefly ortho/polyphosphate blends and ferrous salt compounds—for potable water treatment and wastewater odor and corrosion control in collection and treatment systems. Volusia County Water Resources & Utilities and the City of Dallas Water Utilities dominate recent activity, with both procuring large-volume, multi-year supply agreements. The issuing bodies are water and wastewater utilities operated by counties and cities; these are specialized procurement drivers with recurring, often multi-year contract terms that favor vendors capable of supplying certified products in bulk and drummed formats, managing field testing and consulting services, and meeting federal water quality and environmental compliance standards.

The code shows recent activity concentrated in Florida and Texas. Volusia County issued ITB #26-B-60LS (due April 14, 2026) for liquid blended ortho/polyphosphate corrosion inhibitor chemicals across six water treatment facilities with an estimated annual volume of 3,380 gallons, requiring three-year initial term with two optional one-year renewals and vendor-supplied field water testing and expert consultation. The City of Dallas issued a thirty-six-month ID/IQ service price agreement (BR2600030262, due June 26, 2026) valued at $10 million for purchase and injection of Liquid Ferrous Iron Salt, Liquid Ferrous Chloride, and Bioxide into wastewater collection and treatment infrastructure on an as-needed basis; Dallas imposes mandatory Small Business Enterprise participation goals under its DRIVE Policy and local preference consideration, with bidders required to demonstrate five years of established experience and references from two clients within the previous two years. Both contracts carry prevailing wage floors, comprehensive insurance requirements including pollution liability and environmental impairment coverage, and performance or service bonds tied to contract value. Entry barriers include NSF certification, EPA and state regulatory approval, bulk and drum delivery capability, and proven experience in water utility chemical management.