Patent ID: 11932956
Assignee: UACJ CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. An aluminum member comprising:
a base material made of aluminum or an aluminum alloy; and
an anodized coating comprising a barrier layer on a surface of the base material and a porous layer on the barrier layer, wherein
the anodized coating contains phosphorous (P) and sulfur (S), and has a thickness of 100 μm or less,
in a depth direction heading from a surface of the anodized coating toward the base material, a depth providing a maximum content of S in a region situated at a depth of 500 nm or more from the surface of the anodized coating is larger than a depth providing a maximum content of P in a region situated at a depth of 0 nm or more from the surface of the anodized coating, and an inequality (the maximum content of S in the region of the anodized coating located at the depth of 500 nm or more from the surface of the anodized coating)>(the maximum content of P in the region situated at a depth of 0 nm or more from the surface of the anodized coating) holds,
when amounts of S anal P existing over the depth direction of the anodized coating are defined as TS and TP, respectively, and amounts of S and P existing in the base material at the depth exceeding 100 μm and not more than 200 μm from the surface of the anodized coating are defined MS and MP, respectively, equalities hold as follows:
TS/MS=1.5 to 1500; and
TP/MP=10 to 9000, wherein each of TS, MS, TP and MP is expressed as an integrated value of the amount S or P, respectively, in the depth direction.