Metal member having excellent corrosion resistance, method for producing the same, and material and method for repairing metal member

Patent metadata

Field	Value
Publication number	US-2016177104-A1
Application number	US-201514763346-A
Country	US
Kind code	A1
Filing date	Feb 10, 2015
Priority date	Feb 18, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

An object is to provide an environmentally benign metal member having excellent corrosion resistance which exhibits a long-lasting corrosion resistance effect even in a saltwater environment or the like in which a water current is present, without requiring an external factor such as ultraviolet light. Provided is a metal member having excellent corrosion resistance in which at least a surface is made of an aluminum-based metal, the metal member comprising a corrosion protection film containing a poorly water-soluble lithium compound on the surface or a solid material containing a poorly water-soluble lithium compound on the surface.

First claim

1 . A metal member in which at least a surface is made of an aluminum-based metal, comprising a corrosion protection film containing a poorly water-soluble lithium compound on the surface or a solid material containing a poorly water-soluble lithium compound on the surface attached or fixed onto the surface by using adhesive means.

2 . The metal member according to claim 1 , wherein the poorly water-soluble lithium compound is at least one compound selected from the group consisting of LiH(AlO 2 ) 2 .5H 2 O, LiAl 2 (OH) 7 .xH 2 O, LiAlO 2 , Li 3 PO 4 , and Li 2 CO 3 .

3 . The metal member according to claim 1 , wherein the corrosion protection film is a coating film in which the content of the poorly water-soluble lithium compound per unit area is 1 to 200 g/m 2 .

4 . The metal member according to any one of claim 1 , further comprising a coating film above the corrosion protection film.

5 . (canceled)

6 . The metal member according to claim 1 , wherein the solid material is in a form of particles or a plate.

7 . A method for producing a metal member in which at least a surface is made of an aluminum-based metal, comprising at least:
a film formation step of forming a corrosion protection film containing a poorly water-soluble lithium compound on the surface; or a solid material disposition step of attaching or fixing a solid material containing a poorly water-soluble lithium compound onto the surface by using adhesive means.

8 . The method for producing a metal member according to claim 7 , wherein the poorly water-soluble lithium compound is at least one compound selected from the group consisting of LiH(AlO 2 ) 2 .5H 2 O, LiAl 2 (OH) 7 .xH 2 O, LiAlO 2 , Li 3 PO 4 , and Li 2 CO 3 .

9 . The method for producing a metal member according to claim 7 , further comprising, before the film formation step or the solid material disposition step, a step of preparing the poorly water-soluble lithium compound by immersing aluminum metal or an aluminum compound in an aqueous alkaline solution containing lithium ions, or by mixing an aqueous solution containing aluminate ions with the aqueous alkaline solution.

10 . The method for producing a metal member according to claim 7 , wherein the film formation step comprises a step of forming a coating film in which the content of the poorly water-soluble lithium compound per unit area is 1 to 200 g/m 2 , by applying a coating material containing the poorly water-soluble lithium compound onto the surface.

11 . (canceled)

12 . A material for repairing a metal member, comprising at least: a poorly water-soluble lithium compound, and a binder.

13 . A method for repairing a metal member including a surface made of an aluminum-based metal, the method comprising a step of applying a repairing material containing at least a poorly water-soluble lithium compound and a binder onto a defect portion in the surface.

14 . The metal member according to claim 3 , wherein the coating film is formed by applying a coating material which has insulating properties and contains the poorly water-soluble lithium compound onto the surface, and the coating film is a porous film having fine pores through which lithium ions are capable of passing and through which water incapable of passing.

15 . The method for producing a metal member according to claim 10 , wherein the coating material has insulation properties, and the coating film is an porous film having fine pores through which lithium ions are capable of passing and through which water incapable of passing.

Assignees

• Suzuki Motor Corp

Inventors

• Fujita Masahiro
• Ono Shintaro

Classifications

• C25D11/24

  Chemical after-treatment · CPC title

• C25D11/08

  containing inorganic acids · CPC title

• C23C22/66 Primary

  Treatment of aluminium or alloys based thereon · CPC title

• C23C22/83

  Chemical after-treatment · CPC title

• C09D5/086

  Organic or non-macromolecular compounds · CPC title