BATH FOR SURFACE TREATMENT METHOD OF PRODUCING SURFACE-TREATED STEEL PLATE BY USING THE BATH FOR SURFACE TREATMENT AND SURFACE-TREATED STEEL PLATE PRODUCED BY THE SAME METHOD

摘要

Problems To provide a bath for surface treatment capable of forming a surface-treating film having excellent corrosion resistance by a high-speed electrolytic treatment and a method of producing a surface-treated steel plate having excellent corrosion resistance and closely adhering property to the coating maintaining good productivity. Means for Solution A bath for surface treatment used for forming a surface-treating film on the surface of a steel plate by cathodic electrolysis the bath for surface treatment containing Zr and/or Ti and a polycarboxylic acid.