METHOD FOR MANUFACTURING FINGER PRINTING RESISTANCE TREATED STEEL SHEET

摘要

PURPOSE: A method for manufacturing a finger printing resistance treated steel sheet is provided to improve the forming property of a finger printing resistant steel sheet by sequentially carrying out phosphate treatment and chromate treatment on a galvanized layer formed on a steel sheet. CONSTITUTION: The method for manufacturing a finger printing resistance treated steel sheet comprises the processes of adhering about 600 to 1000 mg/m2 of a phosphate film onto a base metal of the galvanized layer formed steel sheet after forming a galvanized layer on a steel sheet; chromate treating the phosphate film adhered galvanized steel sheet with a solution in which a concentration of hexavalent chromium is 1 to 10 points, and a free acid concentration is in the range of 0.5 to 3; and coating a finger printing resistant resin on the chromate treated steel sheet.