ZN AND ZN-ALLOY COATED STEEL SHEETS WITH AN EXCELLENT PHOSPHATING GALVANIZED SURFACE

摘要

This sheet is used for automobile and electric home appliances by a close nucleation of phosphate on the plane of steel sheets and a fine film formation of phosphate. This coating sheet has a coated layer in the quantity of 0.2 to 10mg/m2 copper. The copper coated layer is a substitution coated layer. The sheet provides a improvement of phosphate treatability by a small coated quantity of copper, and homogeneous film of phosphate in continuous plating line.