Surface-treated aluminum material and method for manufacturing same; and bonded body of surface-treated aluminum material and bonding member comprising said surface-treated aluminum material, and bonding member such as resin, and method for manufacturing said bonded body

Patent metadata

Field	Value
Publication number	US-11230785-B2
Application number	US-201816486745-A
Country	US
Kind code	B2
Filing date	Feb 19, 2018
Priority date	Feb 22, 2017
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

There are provided: a surface-treated aluminum material including an aluminum base material and an alkali alternating current electrolytic oxide coating film formed on at least a part of a surface of the aluminum base material, wherein the alkali alternating current electrolytic oxide coating film includes a porous-type aluminum oxide coating film layer formed on a surface side and a barrier-type aluminum oxide coating film layer formed on a base material side, and plural working grooves perpendicular to the direction of plastic working are formed; a method of producing the surface-treated aluminum material; a bonded body of the surface-treated aluminum material and a member to be bonded, including the surface-treated aluminum material and the member to be bonded, such as resin; and a method of producing the bonded body.

First claim

The invention claimed is:

1. A method of producing a surface-treated aluminum material, the method comprising:
subjecting an aluminum base material connected as a working electrode to an alternating current electrolytic treatment while using an aqueous alkaline solution as an electrolytic solution and a counter electrode to form an oxide coating on at least a part of a surface of the aluminum base material; and
performing plastic working at a strain rate of 1.0×10 −3 to 1.0×10 3 /s to form a plurality of working grooves perpendicular to a direction of plastic working on the oxide coating.

2. The method of producing the surface-treated aluminum material according to claim 1 , wherein a temperature of the electrolytic solution as the aqueous alkaline solution is 30 to 90° C.

3. The method of producing the surface-treated aluminum material according to claim 1 , wherein a pH of the electrolytic solution as the aqueous alkaline solution is 9 to 13.

4. The method of producing the surface-treated aluminum material according to claim 1 , wherein an electrolytic treatment time period of the alternating current electrolytic treatment is 5 to 600 seconds.

5. The method of producing the surface-treated aluminum material according to claim 1 , wherein a current density of the alternating current electrolytic treatment is 4 to 50 A/dm 2 .

6. The method of producing the surface-treated aluminum material according to claim 1 , wherein a frequency of the alternating current electrolytic treatment is 10 to 100 Hz.

7. The method of producing the surface-treated aluminum material according to claim 1 , wherein a tensile strength of the aluminum base material used in the electrode is 30 to 450 MPa.

8. The method of producing the surface-treated aluminum material according to claim 1 , wherein the aluminum base material is held at 0 to 300° C. until the performing plastic working.

Assignees

• Uacj Corp

Inventors

• Yaegashi Tatsuhiro
• Mimura Tatsuya
• Koyama Takahiro

Classifications

• B32B15/20

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title

• B32B2262/101

  Glass fibres · CPC title

• B32B27/288

  comprising polyketones · CPC title

• C25D11/06

  characterised by the electrolytes used · CPC title