ZINC BASED PLATED STRIP WITH INORGANIC-ORGANIC COMPLEX TREATMENT COMPRISING ZINC PHOSPHATE TREATED FILM AND POSTTREATED FILM TO IMPROVE CORROSION RESISTANCE AND COATING ADHESION

摘要

PURPOSE: To provide a zinc based plated strip with inorganic-organic complex treatment which does not contain harmful chromate in treated films and obtains excellent corrosion resistance and coating adhesion after degreasing. CONSTITUTION: The zinc based plated strip with inorganic-organic complex treatment comprises a zinc phosphate treated film coated on the surface of a zinc based plated strip in a coating quantity of 0.3 to 5 g/m¬2; and a posttreated film formed on the zinc phosphate treated film in a coating quantity of 0.01 to 1 g/m¬2, the posttreated film containing (A) an organic resin, (B) a zirconium compound, (C) an inorganic rust inhibitor and (D) an organic rust inhibitor.