Aluminum member and method for producing same
AssigneeNippon Light Metal Company, Ltd.
InventorsTakayuki Yamaguchi, Yoshihiro Taguchi
Life of this patent
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Abstract
Provided is an aluminum member including: a substrate formed of aluminum or an aluminum alloy. The aluminum member includes an anodic oxide coating that includes a barrier layer in contact with a surface of the substrate, a first porous layer in contact with a surface of the barrier layer on an opposite side to the substrate, and a second porous layer in contact with a surface of the first porous layer on an opposite side to the barrier layer and including multiple pores aligned and linearly extending from a surface in contact with the first porous layer toward an exposed surface. The first porous layer includes at least one of: multiple branching pores; or multiple pores having an average pore diameter larger than that of the second porous layer.
Claims12
An aluminum member comprising:
- a substrate formed of aluminum or an aluminum alloy;
- and
- an anodic oxide coating that includes a barrier layer in contact with a surface of the substrate, a first porous layer in contact with a surface of the barrier layer on an opposite side to the substrate, and a second porous layer in contact with a surface of the first porous layer on an opposite side to the barrier layer and including multiple pores aligned and linearly extending from a surface in contact with the first porous layer toward an exposed surface, wherein
- the first porous layer includes at least one of:
- multiple branching pores;
- or multiple pores having an average pore diameter larger than that of the second porous layer,
- a thickness of the barrier layer is less than 300 nm,
- the aluminum member has an L* value of 82.5 to 100, an a* value of −1 to +1, and a b* value of −1.5 to +1.5, where the L* value, the a* value, and the b* value are values in a L*a*b* color system measured from a side of the anodic oxide coating,
- a ratio of a maximum reflection intensity to a minimum reflection intensity is 400 or less when reflection intensity on a side of the anodic oxide coating is measured using a goniophotometer at a detector angle of −80 to +10 degrees.
Dependencies are inferred from the claim text.