Manufacturing method of surface treated steel sheet, surface treated steel sheet and resin coated surface treated steel sheet coated with organic resin on surface treated steel sheet

摘要

The present invention is intended to provide a resin coated surface treated steel plate coated with an organic resin on a surface treated steel plate and a surface treatment steel, which are excellent in corrosion resistance and adhesion of an organic resin coating, which are replaced with a surface treated steel plate having a chromate treatment. For this reason, in the present invention, immersion treatment or electrolytic treatment of a steel plate in the aqueous solution containing Mo, Ti, V or Zr, or an aqueous solution containing a phosphorus compound, and an addition of more than one kind of Mg or Al sulfate, the immersion treatment of the steel plate is performed Electrolytic treatment is performed to form a surface treated steel plate. The surface treated steel sheet is coated with an organic resin to form a resin coated surface treated steel plate.