COMPOSITION FOR REMOVING ALUMINUM SMUT

摘要

PROBLEM TO BE SOLVED: To provide an improved composition and method for pretreating aluminum prior to electroplating. SOLUTION: An aqueous composition consisting of an acid, an oxidizing agent and a halide compound as an optional component is provided by this invention. This composition is useful in a method for efficiently removing the smut generated in the etching stage of an aluminum pretreating process. As an alternate method, such a composition is used in a combined method of etching and smut removal in Al pretreatment.