ALUMINUM-ZINC PLATED STEEL SHEET AND METHOD FOR PRODUCING THE SAME

摘要

The aluminum-zinc plated steel sheet according to the present invention includes a plated steel sheet and a covering film that covers the plated steel sheet. The covering film contains a basic compound of transition metal other than cobalt and chromium, and metallic cobalt, or metallic cobalt and a cobalt compound. An amount of the covering film per one side is within a range of 0.01 to 0.8 g/m2. An amount in terms of mass of transition metal other than cobalt in the covering film per one side of the plated steel sheet is within a range of 4 to 400 mg/m2. An amount in terms of mass of cobalt in the covering film per one side of the plated steel sheet is within a range of 0.1 to 20 mg/m2.

主权项

1. An aluminum-zinc plated steel sheet, comprising:
a plated steel sheet; and a covering film that covers the plated steel sheet, the covering film containing:
a basic compound of transition metal other than cobalt and chromium; andmetallic cobalt, or metallic cobalt and a cobalt compound, an amount of the covering film per one side of the plated steel sheet being within a range of 0.01 to 0.8 g/m2, an amount in terms of mass of transition metal other than cobalt in the covering film per one side of the plated steel sheet being within a range of 4 to 400 mg/m2, an amount in terms of mass of cobalt in the covering film per one side of the plated steel sheet being within a range of 0.1 to 20 mg/m2, and a percentage of a total amount of the phosphorus compound and the fluorine compound in the covering film being 1% by mass or less.