| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated metal sheet which is suitable for outdoor use and excellent in corrosion resistance. SOLUTION: A coated steel sheet icludes at least two coating layers on at least one side of the steel sheet and, as the lower layer of the coating layers, a Zn-plated layer containing 4-22 mass% of Al, 1-5 mass% of Mg, and≤0.5 mass% of Si, and the rest comprising Zn and unavoidable impurities. The uppermost layer of the coating layers has a coating film made of a copolymerization acrylic polyol resin obtained by copolymerizing a polymerizable monomer component indispensably containing a polymerizable monomer having ultraviolet stability, a polymerizable monomer having a cycloalkyl group, and a polymerizable monomer having a hydroxyl group. COPYRIGHT: (C)2011,JPO&INPIT |
