| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a chemical conversion-treated plated steel sheet which includes a hot-dip Zn-Al-Mg alloy-plated steel sheet as a base material, has a chemical conversion-treated film including organic resins, and is excellent in all of weatherability, water resistance, coating film adhesion, anti-glare property and processability. <P>SOLUTION: The chemical conversion-treated film is formed by coating a phosphate treatment liquid on the surface of the hot-dip Zn-Al-Mg alloy-plated steel sheet to form a phosphate film, and coating a chemical conversion treatment liquid on the phosphate film. The chemical conversion treatment liquid contains: a fluorine-containing resin including 0.05-5 mass% of a hydrophilic functional group selected from the group consisting of carboxyl group, sulfonic acid group and their salts and 7-20 mass% of F atom and having a number-average molecular weight within the range from 1,000 to 2,000,000; any of oxyacid salts, fluorides, hydroxides, organic acid salts, carbonates or peroxide salts of group 4A metals; and resin particles having the average grain size of 0.1-10 μm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
