CATION ELECTRODEPOSITION COATING COMPOSITION GIVING EXCELLENT CORROSION RESISTANCE TO GALVANIZED STEEL PLATE AND COATED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a cation electrodeposition coating composition which has excellent hole-forming corrosion resistance in small film thickness, when a galvanized steel plate is used as an article to be coated, and to provide a coated article. SOLUTION: This cation electrodeposition coating composition is characterized by containing antimony pentaoxide dispersed in a pH 4 to 6 aqueous dispersion medium to give the maximum particle diameter of≤1.5μm in an amount of 1 to 5 pts. wt. per 100 pts. wt. of the total amount of the resin component solid contents of the cation electrodeposition coating composition as a pigment, and the coated article. COPYRIGHT: (C)2004,JPO&NCIPI