Aluminum or aluminum alloy treating solution for chemical conversion treatment, chemical conversion treatment method and chemical conversion coating

摘要

Disclosure of the Invention The object of the present invention is to provide a chemical conversion coating film which is excellent in corrosion resistance and design property to an article whose surface portion is made of aluminum or aluminum alloy without using a component having a large environmental load such as hexavalent chrome, And to provide a chemical conversion surface treatment liquid which can be formed by the same process. The present invention relates to an aluminum or aluminum alloy comprising an alkaline aqueous solution containing at least one metal oxygen acid compound selected from the group consisting of a permanganic acid compound and a vanadic acid compound, a molybdic acid compound, a tungstic acid compound, a zirconic acid compound and a niobic acid compound To a solubilizing treatment liquid.