Method for cleaning aluminum articles

摘要

An aluminum article is cleaned to prepare it for plating by soaking it in an aqueous solution containing sodium metasilicate, sodium pyrophosphate and sodium tetraborate at 140 DEG -180 DEG F. The article is then washed by a power spray of a second solution, constituted the same as the first cleaning solution, at 110 DEG -130 DEG F. The article is subsequently rinsed with water and immersed in an aqueous nitric acid solution.