An Investigation on Additives in Methanesulfonic Acid Tin-Lead Alloy Electroplating

Research status of additives in sulfonic acid tin lead electroplating in recent ten years at home and abroad is introduced. The additives are classified as Sn 2+ stabilizer, brightener and carrier three kinds according to their chemical structure and to the performance they exhibited in electroplating. Main performances of the additives for methanesulfornic acid Sn Pb alloy electroplating developed recently by the company and the technological formulation of the methane sulfonic acid Sn Pb electroplating bath are presented.