COMPOSITION AND METHOD FOR STRIPPING TIN OR TIN-LEAD ALLOY FROM COPPER SURFACES

摘要

A composition for stripping tin or solder, as wellas any underlying copper-tin alloy, from copper surfaces,containing an alkane sulfonic acid, preferably methanesulfonic acid, and an inorganic nitrate, preferablyferric nitrate. The composition effects strippingwithout any appreciable formation of sludge orprecipitate or suspended particles.