| 摘要 |
PROBLEM TO BE SOLVED: To produce a plated steel sheet and a laminated steel sheet excellent in corrosion resistance after working, film adhesion and printing appearance. SOLUTION: This plated steel sheet excellent in corrosion-resistance after working, film adhesion and printing appearance is the one whose both sides are provided with, from the steel sheet side, a chromium plating layer of 30 to 300 mg/m2, a tinning layer of >1000 to 3000 mg/m2, a chromium plating layer of 5 to 100 mg/m2 and a chromium hydrated oxide layer of 5 to 30 mg/m2 expressed in terms of chromium. Furthermore, the method for producing the plated steel sheet excellent in corrosion-resistance after working, film adhesion and printing appearance is the one in which, at the time of applying chromium plating on a steel sheet and successively executing tinning, at first, electrolysis is executed at the critical current density or above in a tinning bath to remove chromium hydrated oxide, and, after that, electrolysis is executed at the ordinary current density to form a tinning layer, which is formed into a plated steel sheet.
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