Aluminum Material or Aluminum Alloy Material Provided With Coating Film, Method for Producing Same, and Aqueous Surface Treatment Agent
AssigneeNihon Parkerizing Co., Ltd.
InventorsHiroshi Shimizu, Yusuke Yamamoto, Aoi Washio, Keitaro Nojiri
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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.
Claims4
An aluminum material or aluminum alloy material, comprising, on or over a surface thereof, a coating containing chromium, zirconium, zinc, and carbon,
- wherein, in an infrared spectrum of the coating that is 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.
An aqueous surface treatment agent used for a surface treatment of an aluminum or aluminum alloy material, the aqueous surface treatment agent comprising:
- a chromium-containing ion (A);
- a zirconium-containing ion (B);
- a zinc-containing ion (C);
- and
- an organic compound (D) having a hydroxy group and a carboxyl group.
Dependencies are inferred from the claim text.