Composition containing alkane sulfonic acid and ferric nitrate for stripping tin or tin-lead alloy from copper surfaces, and method for stripping tin or tin-lead alloy

摘要

A composition for stripping tin or solder, as well as any underlying copper-tin alloy, from copper surfaces, containing an alkane sulfonic acid, preferably methane sulfonic acid, and an inroganic nitrate, preferably ferric nitrate. The composition effects stripping without any appreciable formation of sludge or precipitate or suspended particles.