Process for coating aluminum or aluminum alloy
AssigneesKansai Paint Co., Ltd., Fuji Sashi Industries Limited
InventorsNorio Nikaido, Shinji Shirai, Mototaka Iihashi, Sueo Umemoto
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Abstract
A process for coating an aluminum or aluminum alloy comprising the steps of subjecting the aluminum or aluminum alloy to boehmite treatment or chemical conversion treatment, anodizing the resulting aluminum or aluminum alloy in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating the aluminum or aluminum alloy with an organic coating composition to form a resin layer, said oxyacid being at least one oxyacid selected from the group consisting of silicic acid, boric acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.
Claims18
A process for coating an aluminum or aluminum alloy comprising the steps of subjecting the aluminum or aluminum alloy to treatment with steam or hot water to form a boehmite layer or to chemical conversion treatment with at least one of phosphate and chromate, electrolytically anodizing the resulting aluminum or aluminum alloy in an aqueous solution of a water-soluble salt of at least one oxyacid, and thereafter coating the aluminum or aluminum alloy with an organic coating composition to form a resin layer, said oxyacid being at least one oxyacid selected from the group consisting of silicic acid, phosphoric acid, molybdic acid, vanadic acid, permanganic acid, stannic acid and tungstic acid.
Dependencies are inferred from the claim text.