CONPOSITE COATED STEEL PLATE WITH SUPERIOR CORROSION RESISTANCE, COATING ADHESION AND CORROSION RESISTANCE AFTER COATING

摘要

PURPOSE:To enhance the corrosion resistance and adhesion of a steel plate plated with Zn, Al or the like by forming a 2-layered coat composed of a chromate coat and a coat of composite org. silicate resin or the resin contg. alkoxide chelate compound. CONSTITUTION:A steel plate is plated with Zn, a Zn alloy or Al, and the plated surface is subjected to chromate treatment. On the resulting chromate coat a coat of composite org. silicate resin consisting of silica sol and org. resin or a coat of said silicate resin contg. alkoxide chelate compound is laid to form a 2-layered coat. Thus, a steel plate with superior corrosion resistance and adhesion is obtd.