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Method for surface treatment of aluminum alloy

A technology of aluminum alloy surface and surface treatment, applied in the direction of metal material coating process, etc., can solve problems such as cost increase, and achieve good corrosion resistance.

Inactive Publication Date: 2007-06-13
HONDA MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in order to ensure good corrosion resistance, it is necessary to reduce the copper content in the aluminum alloy, but this cannot be said to be a good solution because it involves an increase in cost.

Method used

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  • Method for surface treatment of aluminum alloy

Examples

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Embodiment

[0056] Hereinafter, the present invention will be described in further detail based on examples, but the present invention is not limited thereto.

[0057] (Example 1-7, Comparison 1-5)

[0058] (processing object raw materials)

[0059] In any of Examples 1 to 7 and Comparative Examples 1 to 5, the same aluminum alloy was used as the raw material to be processed. Specifically, an aluminum alloy having a copper content of 0.01% by mass or less, 0.1% by mass, and 0.2% by mass is used. The size of the aluminum alloy is 70mm×150mm, and the thickness is 0.8mm. These aluminum alloys were ground through #180 sandpaper using a double action sander ("905B4D" manufactured by Compact Tool Co., Ltd.) and used as raw materials for processing. In addition, among these aluminum alloys which have been solidly ground, the aluminum alloy which makes SPC contact conduction is used as the raw material to be processed, and this SPC has the same size and thickness as the aluminum alloy. That i...

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Abstract

A method for surface treatment of aluminum alloy to form a uniform and dense zinc phosphate coating, which has excellent corrosion resistance properties on the surface of the aluminum alloy. The method includes steps of surface adjusting the surface of the aluminum alloy by a surface adjustor containing a predetermined volume of zinc phosphate particles, copolymer containing carboxylic acid group, and natural hectorite and / or synthetic hectorite respectively, and chemical conversion treating the surface of the resultant aluminum alloy by a zinc phosphate treating agent containing a predetermined volume of chelating agent that can chelate bond with iron ion.

Description

technical field [0001] The invention relates to a surface treatment method of an aluminum alloy, in particular to a surface treatment method of an aluminum alloy capable of forming a uniform and dense zinc phosphate film with good corrosion resistance on the surface of the aluminum alloy. Background technique [0002] Metal materials such as steel sheets, galvanized steel sheets, and aluminum alloys are used in various fields such as automobile bodies, auto parts, building materials, and furniture, and these metal materials are formed and coated to form finished products. In addition to improving the appearance of these metal materials, the main purpose of coating is to prevent corrosion of metal materials. As a pretreatment for coating, degreasing, surface adjustment, and chemical conversion treatment (conversion treatment, chemical method (metal ) surface treatment) and other surface treatment. [0003] Surface conditioning is a treatment necessary to uniformly and rapidl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07C23G1/22
CPCC23C22/66C23C22/78C23C22/365C23C22/05C23C22/07C23C22/13
Inventor 安藤克利新里文明四之宫光男中泽淑子
Owner HONDA MOTOR CO LTD
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