Patent ID: 8262938

Claim:
A chromate-free corrosion-inhibiting coating composition for application onto metal substrates consisting essentially of, in parts by weight, from about 15 to 50 parts of a film-forming binder selected from the group consisting of polyacrylates, polyurethanes, polyimides, polymers derived from epoxies, polymers derived from isocyanates, and an uncured pre-polymers of said polymers, 40 to 85 parts of a galvanic aluminum alloy powder prepared in an oxygen or nitrogen-hydrogen atmosphere having a particle size ranging from about 10 to 100 microns; said aluminum alloy powder having the formula: Aluminum-Zinc-X (AlZnX), wherein X is an element selected from the group consisting of indium, gallium, tin, and bismuth, from about 0.0 to 2.0 parts of at least one wetting agent, from about 1.0 to 10 parts of at least one corrosion inhibitor selected from the group consisting of an inorganic talcite clay, benzimidazole, benzothiazole, benzoxazole, diphenyltriazole, benzotriazole and tolyltriazole, and effective amounts of solvent.