| 摘要 |
PROBLEM TO BE SOLVED: To provide plated steel with a chromate-free treated film, which has excellent corrosion resistance. SOLUTION: In the plated steel, at least on side is provided with a corrosion resistant coated layer obtained by a treatment solution containing zirconium carbonate complex ions, vanadyl ions (VO<2+> ) and oxycarboxylic acid, and containing, as the concentration in the solid contents, 10 to 30% zirconium, 5 to 20% vanadium, 20 to 50% oxycarboxylic acid, 0.01 to 1% meso-2,3- dimercaptosuccinic acid, and 0.01 to 1% ammonium phosphate by 200 to 1,200 mg/m<2> as the coating weight of a film. Preferably, the corrosion resistant coated layer contains a zirconium compound by 10 to 30% in terms of zirconium, a vanadyl compound by 5 to 20% in terms of vanadium, and meso-2,3- dimercaptosuccinic acid by 0.01 to 1%.
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