| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a galvanized steel sheet superior in whiteness stably for a long time and to suppress deterioration of electrolytic efficiency to the minimum, in a method for manufacturing an electrogalvanized steel sheet by using electrogalvanizing bath to which specified organic compounds are added.SOLUTION: In a method for manufacturing an electrogalvanized steel sheet, a steel sheet is cathode-electrolysis-treated in electrogalvanizing bath containing 2-mercaptobenzothiazole or/and its salt by 0.1-1.0 mass ppm in total. The steel sheet is cathode-electrolysis-treated in the electrogalvanizing bath whose Fe concentration is controlled to 100-1,000 mass ppm. |
