PHOSPHATE SOLUTION FOR ZINC-BASED PLATED STEEL SHEET AND METHOD FOR MANUFACTURING PHOSPHATE-TREATED ZINC-BASED PLATED STEEL SHEET HAVING EXCELLENT DISCOLORATION RESISTANCE AND FILM ADHESIVENESS USING THE SAME

摘要

Disclosed are a phosphate solution for a zinc-based plated steel sheet and a method for manufacturing a phosphate-treated zinc-based plated steel sheet having excellent discoloration resistance and a film adhesiveness using the same. According to an aspect of the present invention, provided is the phosphate solution for a zinc-based plated steel sheet, which comprises: Zn^2+ of 500-3000 ppm; Ni^+ of 50-1000 ppm; and Mg^2+ of 3000-40000 ppm.