CATIONIC ELECTRODEPOSITION COATING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a cationic electrodeposition coating composition which improves long-term anticorrosion properties of a zinc-nickel alloy plated steel plate, or the like. SOLUTION: This cationic electrodeposition coating composition comprises a hydrate of bismuth oxide having the largest particle size of at most 2μm to improve its long-term anticorrosion properties.