Molybdate-based pigments inhibit corrosion by passivating the anodic sites by formation of a protective layer on the substrate through molybdate ions. Pure molybdate-based pigments have limited commercial importance due to their high cost. Therefore, they are combined with phosphate pigments or are coated onto inorganic fillers like calcium carbonate and zinc oxide. Some important molybdate pigments include zinc molybdate, calcium zinc molybdate, zinc phosphate molybdate and calcium zinc phosphate molybdate.
Molybdate pigments
21 ноября, 2015 Pokraskin