Лако-красочные материалы — производство

Chromate pigments have been used for long time as corrosion inhibi- tive pigments. The anticorrosive action of chromates is derived from the presence of a certain amount of water-soluble chromates. Soluble chromate ions are inhibitive, and chromate passivating ions are among the most efficient passivators known. They are effective both in catho­dic and anodic areas. Anticorrosive properties of chromate pigments depend on their content of water-soluble chromate ions, their neutra­lizing and pH stabilizing effect, and their dispersibility, particle size and particle shape. Some important chromate pigments are as follows.