COATED METAL PLATE AND EXTERIOR BUILDING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a coated metal plate for exterior application, which is chromate-free and yet has excellent corrosion resistance in a flat part.SOLUTION: A coated metal plate according to this invention is a chromate-free coated metal plate for exterior applications, which comprises a coating film that is arranged on a predetermined metal plate. The coating film contains 0.01-15% by volume of porous particles as a gloss control agent. If R (μm) is the number average particle diameter of the gloss control agent, T (μm) is the film thickness of the coating film, andσis the standard deviation of the number-based particle size distribution of the gloss control agent, the coated metal plate satisfies the following formula:(R+2σ)/T≤0.7; R≥2.0; 9≤T≤19;σ<0.3T.