... via a process commonly referred to as leaching. Electrolytic refining uses a similar process to remove impurities from ... , and impurities is removed. The metals can be treated with electrolytic refining, are copper, zinc, lead, gold, silver, aluminum, ... of a metal sheet including cleaning rectifier, Pickling Rectifier, Electrolytic cleaning rectifier, and Electroplating Rectifier using SCR phase shift ...