The high glossy natural alloy color development anodic oxidation aluminum material, production manner and the compound aluminum material null which is used for

摘要

PROBLEM TO BE SOLVED: To obtain a self-developing alloy having a high glossy feeling, and to reduce an environmental load through the reduction of smut.;SOLUTION: A transparent anodization-treated coating is formed on a colored self developing anodization-treated coating. Concretely, to a composite aluminum material obtained by forming an external layer material composed of pure aluminum with a substantially uniform thickness of 1 to 10 μm and a purity of ≥99.6% on the surface of at least one side in an aluminum alloy internal layer material having colored self-developing, an anodization-treated coating with a thickness of ≥2 times that of the external layer material is formed. As the internal layer material, an Al-Mn based alloy comprising 1.1 to 2.5% Mn, an Al-Si based alloy comprising 2 to 15% Si or the like can be cited.;COPYRIGHT: (C)2006,JPO&NCIPI