Projection material for mechanical plating and high corrosion-resistant coating

Patent metadata

Field	Value
Publication number	US-10907257-B2
Application number	US-201615765700-A
Country	US
Kind code	B2
Filing date	Jul 19, 2016
Priority date	Oct 23, 2015
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

In a projection material for mechanical plating, a steel particle is used as a core, and the surrounding surface thereof is coated with a zinc alloy in which the content of Al is more than 5% by mass but equal to or less than 16% by mass, the content of Mg is equal to or more than 5.5% by mass but equal to or less than 15% by mass and the remaining portion is Zn and an impurity, and the content of Fe is equal to or more than 3% by mass but equal to or less than 80% by mass. In this way, the corrosion resistance of a zinc-based coating itself formed in mechanical plating is remarkably enhanced without dependence on protective coating formation treatment such as chromate treatment.

First claim

The invention claimed is:

1. A projection material for mechanical plating, wherein the projection material is comprised of a plurality of coated steel particles,
wherein each coated steel particle is comprised of a steel particle as a core, and having a coating thereover of a zinc alloy consisting of a content of Al that is equal to or more than 5.9% by mass but equal to or less than 16% by mass, a content of Mg that is equal to or more than 5.5% by mass but equal to or less than 15% by mass, and a remaining portion that is Zn and one or more impurities, and
wherein in the projection material, a content of Fe is equal to or more than 3% by mass but equal to or less than 80% by mass.

2. The projection material for mechanical plating according to claim 1 ,
wherein an interface layer is formed between the steel core and the zinc alloy coating and comprises a Fe—Zn alloy.

3. The projection material for mechanical plating according to claim 1 ,
wherein an average particle diameter of the coated steel particles is 100 to 600 μm.

4. The projection material for mechanical plating according to claim 2 ,
wherein an average particle diameter of the coated steel particles is 100 to 600 μm.

5. A method of forming a coating on a surface of a metal material,
comprising colliding the projection material according to claim 1 with the surface of the metal material so as to form the coating on the surface of the metal material.

6. A method of forming a coating on a surface of a metal material,
comprising colliding the projection material according to claim 2 with the surface of the metal material so as to form the coating on the surface of the metal material.

7. A method of forming a coating on a surface of a metal material,
comprising colliding the projection material according to claim 3 with the surface of the metal material so as to form the coating on the surface of the metal material.

8. A method of forming a coating on a surface of a metal material,
comprising colliding wherein the projection material according to claim 4 with the surface of the metal material so as to form the coating on the surface of the metal material.

9. The projection material for mechanical plating according to claim 1 ,
wherein in the composition of the zinc-alloy coating, a content of Al is equal to or more than 8.6% by mass but equal to or less than 16% by mass.

Assignees

• Dowa Ip Creation Co Ltd
• Honda Motor Co Ltd

Inventors

• Fujiwara Takashi
• Okamoto Naohisa
• Kimura Kenji
• Miyadera Tsutomu

Classifications

• B22F1/00

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F1/17

  Metallic particles coated with metal · CPC title

• B22F1/05

  Metallic powder characterised by the size or surface area of the particles · CPC title

• C22C18/00

  Alloys based on zinc · CPC title

• Y10T428/12181

  Composite powder [e.g., coated, etc.] · CPC title