| 摘要 |
<p>A metal material having a coating formed by a surface treatment on the surface of the metal material is provided. The coating has an excellent corrosion resistance with or without further coating that is equivalent or superior to the prior art coating formed by zinc phosphate treatment or chromate treatment, is free from sludge formation or environmentally harmful components, and is formed by using a component capable of deposition with a simple method. A surface treated metal material having on a surface of a metal material a coating layer formed by a surface treatment, the coating layer comprising the following components (A) and (B): (A) oxide and/or hydroxide of at least one metallic element selected from the group consisting of Ti, Zr, and Hf; and (B) aluminum element; wherein, in the coating layer formed by the surface treatment, weight ratio K 1 (= B/A) which is weight ratio of coating weight B of the aluminum element of the component (B) to total coating weight A of the metallic element in the component (A) is in the range of 0.001 ‰ K 1 ‰ 2.</p> |
