Surface treatment agent for metal materials, metal material coated with surface treatment film, and method for producing same

Patent metadata

Field	Value
Publication number	US-12018175-B2
Application number	US-201917253418-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 28, 2018
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

The purpose of the present invention is to provide a surface treatment agent which is capable of forming, on a metal material, a film that not only comprehensively satisfies various performance such as corrosion resistance and adhesion but also exhibits excellent corrosion resistance and adhesion even when exposed to a high-temperature environment. The Problem is solved by a surface treatment agent for metal materials, which contains: a compound and/or mixture (A) represented by M 2 O·SiO 2 , wherein a molar ratio of SiO 2 /M 2 O is in a range of 1.8 to 7.0 and M represents an alkali metal; a stabilized zirconium oxide (B); and a component (C) that contains at least one selected from metal oxide particles and clay minerals except for the compound and/or mixture (A) and the stabilized zirconium oxide (B).

First claim

The invention claimed is:

1. A surface treatment agent for metal materials, comprising:
a compound and/or mixture (A) represented by M 2 O·SiO 2 , wherein a molar ratio of SiO 2 /M 2 O is in a range of 1.8 to 7.0 and M represents an alkali metal;
a stabilized zirconium oxide (B);
a component (C) that comprises at least one selected from metal oxide particles and clay minerals except for the compound and/or mixture (A) and the stabilized zirconium oxide (B), and
a solvent, wherein
a content of the compound and/or mixture (A) is in a range of 42.8% by mass to 87.5% by mass with respect to a total solid content of the surface treatment agent,
a ratio (BM/AM) of a mass (BM) of the stabilized zirconium oxide (B) to a mass (AM) of the compound and/or mixture (A) is in a range of 0.08 to 0.5,
a ratio (CM/AM) of a mass (CM) of the component (C) to the mass (AM) is in a range of 0.08 to 0.5, and
a content of the solvent is in a range of 40% by mass to 80% by mass with respect to a total mass of the surface treatment agent.

2. The surface treatment agent for metal materials according to claim 1 , wherein
the stabilized zirconium oxide (B) comprises CeO 2 as a stabilizer, and
a mass ratio (CeO 2 /ZrO 2 ) of CeO 2 to zirconium oxide (ZrO 2 ) is in a range of 0.01 to 1.0.

3. The surface treatment agent for metal materials according to claim 1 , wherein a molar ratio of SiO 2 /M 2 O in the compound and/or mixture (A) is in a range of 3.9 to 6.0.

4. A metal material coated with a surface treatment film, comprising a film formed by contacting the surface treatment agent for metal materials according to claim 1 with the surface of the metal material.

5. A method of producing a metal material coated with a surface treatment film, the method comprising a step of attaching a film formed from the surface treatment agent for metal materials according to claim 1 to a metal material.

Assignees

• Nihon Parkerizing

Inventors

• Uchida Junichi
• Haijima Yuki
• Sueuchi Yuki

Classifications

• C23C24/00

  Coating starting from inorganic powder (spraying of the coating material in molten state C23C4/00; solid state diffusion C23C8/00 - C23C12/00) · CPC title

• C09D1/02 Primary

  alkali metal silicates · CPC title

• C09D5/084

  Inorganic compounds · CPC title

• C09D5/08 Primary

  Anti-corrosive paints · CPC title

• C08K3/346

  Clay · CPC title