Effects of Phenolsulfonate on the Electrolyte: Plating Efficiency and the Deposit

摘要

In phenolsulfonic acid-based bath for electrotinning, extended use of electrolyte makes the desirable plating current density range narrower. It was assumed that the aging of electrolyte was caused by the contamination of metal impurities and the accumulation of phenolsulfonate. In this study, the effects of the accumulation of phenolsufonate, added as sodium phenolsulfonate, on the characteristics of electrolyte, plating efficiency and the deposit were investigated. The rise of phenolsulfonate concentration decreases the desirable plating current density range.