Aluminum flake pigment treated with metal salts and coatings containing the same.

摘要

The invention is an aluminum flake pigment particle, surface treated with a transition metal or rare earth metal salt. The treated pigment particle has been found to be highly useful in water-borne coating compositions having a basic pH. The treated pigment particles experience significantly less hydrogen gassing in a high pH environment, and in water-borne coating compositions than untreated aluminum flake pigment particles. The treated pigment particles are also useful when combined with a pigment dispersant composition to further inhibit corrosion and gassing when the pigments are used in a coating composition.