Corrosion-proof aluminum material and method for producing the same

Abstract

Provided is a surface treatment technique for a metal base material, which can be applied also to a metal base material in the form of a thin film, can substantially maintain the function of the surface of the metal base material, and provides excellent corrosion resistance and pitting corrosion resistance. The present invention relates to a corrosion-proof aluminum material, including: a metal base material composed of aluminum or an aluminum alloy; and a coating film layer formed with a silane coupling agent having a sulfur atom and disposed on a surface of the metal base material, wherein the ratio of the concentration of sulfur atom in the surface of the coating film layer to the concentration of aluminum atom is 0.4 or more.

Dependencies are inferred from the claim text.