Molybdate pigments

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.

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