A METHOD FOR DESMUTTING ALUMINUM ALLOYS HAVING A HIGHLY REFLECTIVE SURFACE

摘要

A method of forming highly reflective surface on aluminum alloys comprising (a) brightening the surface of a body formed from an aluminum alloy; and(b) desmutting the freshly brightened body in a bath. The desmutting bath com-prises 10-100 volume percent nitric acid; 0-60 volume percent sulfuric acid, 0-50 volume percent water; and at least 15 grams per liter of a source of bifluoride.Ammonium fluoride is the preferred source of fluoride.