Aluminum Material or Aluminum Alloy Material Provided With Coating Film, Method for Producing Same, and Aqueous Surface Treatment Agent

Abstract

The present invention addresses the problem of providing an aluminum material or aluminum alloy material that includes a surface treatment coating having excellent thermal corrosion resistance. The problem is solved by an aluminum material or aluminum alloy material that includes, on or over a surface thereof, a coating containing chromium, zirconium, zinc, and carbon. In an infrared spectrum of the coating measured by a specular reflection method of Fourier transform infrared spectroscopy (FT-IR), peaks appear at 3,600 cm−1 to 3,000 cm−1 and 1,750 cm−1 to 1,700 cm−1.