SURFACE-TREATED ALUMINUM MATERIAL AND ZINC-SUPPLEMENTED ALUMINUM ALLOY
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United States of America Patent
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Mar 12, 2015
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Apr 2, 2014
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Abstract
Provided are a surface-treated aluminum material having, on an aluminum material formed of aluminum or an aluminum alloy, a porous anodically oxidized film of a uniformly porous type exhibiting no visually recognizable crystal grain pattern after anodic oxidation treatment, and a novel zinc-doped aluminum alloy suitable for manufacture of the surface-treated aluminum material. The surface-treated aluminum material includes an aluminum alloy base material and an anodically oxidized film formed on a surface thereof, in which the aluminum alloy base material is formed of a zinc-doped aluminum alloy having an alloy composition containing 0.05 mass % to 1 mass % of a Zn component, 0.02 mass % or less of inevitable impurities, and the balance of aluminum.
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