Trivalent chromium containing composition improved in aluminium and aluminium alloys

摘要

Abstract invention patent: "trivalent chromium containing composition improved in aluminium and aluminium alloys.The present invention relates to a trivalent chrome sludge down based on the conversion coating bath to form corrosion resistant coatings on aluminium and aluminium alloys by contact with the bath, which is suitable for use as a conversion coating, which can be a Rinsing or dried in place, to metal, which comprises trivalent chromium cations, anions of fluorometalato,Guanidine ions and at least one organic additive anti-corrosion, and other optional components, and methods of making and using the same, and coated metals using the compositions, coated aluminum serving as an effective basis for paint primers.