Aluminum member and method of manufacturing the same
AssigneeUacj Corporation
InventorJunji Nunomura
Life of this patent
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Abstract
An aluminum member comprises a base material made of aluminum or art aluminum alloy, and an anodized coating provided on a surface of the base material and having a thickness of 100 μm or less. The anodized coating comprises a barrier layer formed on the surface of the base material and having a thickness of 10 to 150 nm, and a porous layer formed on the barrier layer and having a thickness of 6 μm or more. The porous layer comprises a first pore extending in a thickness direction of the porous layer from a boundary between the porous layer and the barrier layer, and a second pore connected to the first pore and extending so as to branch radially in the thickness direction of the porous layer toward a surface of the porous layer.
Claims6
An aluminum member comprising:
- a base material made of aluminum or an aluminum alloy;
- and
- an anodized coating provided on a surface of the base material and having a thickness of 100 μm or less,
- wherein the anodized coating comprises
- a barrier layer formed on the surface of the base material and having a thickness of 10 to 150 nm, and
- a porous layer formed on the barrier layer and having a thickness of 6 μm or more, and
- the porous layer comprises
- a first pore extending in a thickness direction of the porous layer from a boundary between the porous layer and the barrier layer;
- and
- a second pore connected to the first pore and extending so as to branch radially in the thickness direction of the porous layer toward a surface of the porous layer.
A method of manufacturing an aluminum member, comprising:
- preparing a base material made of aluminum or an aluminum alloy;
- and
- performing anodization on the base material in an electrolytic solution under conditions where a current density is 5 to 30 mA·cm−and a temperature of the electrolytic solution is 0 to 80° C., the electrolytic solution comprising:
- a first acid or a salt of the first acid at a concentration of 0.01 to 2.0 mol·dm−3, the first acid being selected from the group consisting of an inorganic acid and an organic carboxylic acid;
- and a second acid at a concentration of 0.01 to 5.0 mol·dm−3, the second acid being an acid anhydride.
Dependencies are inferred from the claim text.