Rust Inhibitor for Architectural Coatings

CAS Number: 7778-77-0

Rust inhibitors for architectural coatings are corrosion-inhibiting additives incorporated into waterborne primers and topcoats applied to ferrous metal substrates in architectural applications. Based on phosphate, tannate, or organic inhibitor chemistry, they form a passive layer on the metal surface that prevents the electrochemical oxidation responsible for rust. These additives are used in direct-to-metal (DTM) architectural primers, window frame coatings, and structural steel maintenance paints.