A method of electroplating of a steel strip having a zn - ni - alloy

摘要

PURPOSE:To form Zn-Ni alloy plating coating having a stable good surface luster, by carrying out electroplating using plating liquid containing Ni2+ ion and Zn2+ ion and also, including SrSO4 having a specific concentration. CONSTITUTION:SrSO4 is colloidally included within the range of 0.05-10g/l in plating liquid containing Ni2+ ion and Zn2+ ion. Zn-Ni alloy plating is able to obtain while having always stable surface luster even when plating condition is varied, by carrying out electroplating by using the above plating liquid and also, using insoluble Pb alloy as anode. Zn-Ni alloy coating of stable luster is able to form in case of carrying out plating on a steel sheet.