UNSPSC 12164303: Iron corrosion inhibitor

An additive to inhibit formation of rust, e.g., iron oxides, usually red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture.

UNSPSC 12164303 Iron corrosion inhibitor is a Commodity code covering water treatment and infrastructure maintenance chemicals that state and local water utilities procure to protect equipment, pipelines, and treatment systems from rust and degradation. Recent solicitations show that state and local governments are actually purchasing lime slaking systems and their replacement parts, calcium oxide (quicklime), sodium hypochlorite, hydrochloric acid, hydrated lime, muriatic acid, and related water and wastewater treatment chemicals—products that inhibit corrosion or support corrosion-control processes in water treatment. The issuing bodies are primarily municipal water departments and public utilities, particularly in Florida and Georgia, along with county water authorities and special-purpose water resource recovery districts. Cities of Holly Hill, St. Petersburg, Phoenix, Valdosta, Cartersville, Cocoa, and Meriden have posted recent competitive or sole-source solicitations; Clean Water Services (Oregon water district) and Gwinnett County (Georgia) also appear in the recent activity, indicating a mix of city utilities, county systems, and regional special districts.

Recent opportunities cluster in Florida, Georgia, Oregon, Arizona, and Connecticut. The City of St. Petersburg's IFB 26-344 for calcium oxide (lime) delivery to its COSME Water Treatment Plant, posted October 9, 2026 with bids due October 29, 2026, is typical of direct competitive procurement: 1,800 dry tons annually in 25-ton bulk deliveries to support seven storage silos, with NSF and AWWA B202-25 certification required. The City of Cartersville Water Department's IFB for treatment chemicals to two facilities, due October 30, 2026, solicits eight line-item chemicals delivered on individual award basis, including liquid lime slurry and sodium bisulfite. The City of Phoenix's IFB 260104 seeks hydrochloric and citric acid solutions in multiple container sizes on a five-year term with DBE and small business participation requirements. Clean Water Services (Oregon) issued ITB SX3435000017996 for hydrated lime bulk delivery to three water resource recovery facilities, due September 30, 2026. Sole-source notices from Holly Hill (Chemco Systems lime slaking systems, October 19, 2026) and Andritz Separation replacement parts indicate that equipment-specific corrosion-inhibition systems and spare parts also fall within active procurement under this code, though sole sourcing limits competitive opportunity.