C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 28/00 (2006.01) B32B 15/04 (2006.01) B32B 15/20 (2006.01) C23C 22/68 (2006.01) C23C 22/78 (2006.01)
Patent
CA 2095525
- 28 - A B S T R A C T The present invention provides an aluminum alloy sheets for auto body panels, having a metal aluminum substrate formed of an aluminum alloy containing 2 to 10% by weight of magnesium, an aluminum phosphate film formed on the substrate, an aluminum oxide film formed on the phosphate film, and, as desired, an oil film formed on the aluminum oxide film. The present invention also provides a method of manufacturing an aluminum alloy sheets for auto body panels, having the steps of treating the surface of an aluminum alloy sheets containing 2 to 10% by weight of magnesium with an acid having a pH value of at most 4 to remove magnesium oxide contained in an aluminum oxide- based film formed on the surface of the alloy sheets, treating the surface of the alloy sheets with a phosphate solution to form an aluminum phosphate film between the metal aluminum substrate and the aluminum oxide film, and, as desired coating the aluminum oxide film with an oil to form an oil film.
Ishida Yoji
Kurihara Masaaki
Nabae Motohiro
Furukawa Aluminum Co. Ltd.
Ishida Yoji
Kawasaki Steel Corporation
Kurihara Masaaki
Nabae Motohiro
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