| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot-dip galvanized steel sheet coated with a chromate-free film, which is superior in corrosion resistance such as white-rust resistance and also in adhesiveness with a chromate-free film, even when the steel sheet is coated with the organic chromate-free film, and to provide a useful method for manufacturing the hot-dip galvanized steel sheet coated with such a chromate-free film. <P>SOLUTION: The hot-dip galvanized steel sheet is a hot-dip galvanized steel sheet coated with the chromate-free film, which has a hot-dip galvanized layer and an organic chromate-free film thereon. The hot-dip galvanized layer contains 1-5.0 mass% Al in a surface layer part within 10 nm deep from a plated outermost surface, when measured by a high-frequency glow-discharge emission spectrochemical analysis. <P>COPYRIGHT: (C)2010,JPO&INPIT |
