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Surface treatment process used before coating of aluminum alloy

A surface treatment and aluminum alloy technology, which is applied in the coating process of metal materials, etc., can solve the problems of easy peeling off of the coating, difficulty in attaching the coating to the aluminum alloy, and insufficient surface adhesion.

Inactive Publication Date: 2014-03-26
ZHEJIANG HONGFENG ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, many products used in the market are aluminum alloys, and the aluminum alloys that people directly contact with daily are all treated with surface coating. Because the surface of aluminum alloy is usually smooth, if the surface is not treated, its surface adhesion is not enough, the coating is difficult to attach to the surface of aluminum alloy, even if the surface is coated, the coating is easy to fall off

Method used

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Embodiment Construction

[0013] The specific embodiment of the present invention is described further below:

[0014] A kind of surface treatment process before aluminum alloy coating, its specific steps are as follows:

[0015] 1): Grind off the residue on the surface of the rough aluminum alloy with coarse sandpaper, and polish the surface with coarse sandpaper. This step is mainly because the surface of the aluminum alloy will produce some fine residues due to thermoplasticity after the die-casting is completed. These residues are not easy to be cleared during the phosphating process, so it needs to be manually removed with sandpaper and polished with sandpaper. Can increase the surface roughness of aluminum alloy.

[0016] 2): Put the aluminum alloy polished in step 1 into the shot blasting machine for surface shot blasting, and keep the shot blasting time for 10 minutes. Shot blasting is to use the centrifugal force of the impeller on the blasting head of the shot blasting machine when it rotat...

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Abstract

The invention discloses a surface treatment process used before coating of an aluminum alloy. The process sequentially comprises steps as follows: firstly, the surface of the aluminum alloy is polished by coarse sandpaper, then, the polished aluminum alloy is put into a shot blasting machine for shot blasting treatment and put into a phosphorization tank for phosphorization after the shot blasting treatment, and finally, cleaning and cooling are performed. The treatment method has the advantages that the adhesive force of the treated surface of the aluminum alloy is enhanced, a coating is not prone to fall off, and the strength of the surface of the aluminum alloy is good.

Description

technical field [0001] The invention relates to a surface treatment process before aluminum alloy coating. Background technique [0002] At present, many products used in the market are aluminum alloys, and the aluminum alloys that people directly contact with daily are all treated with surface coating. Because the surface of aluminum alloy is usually smooth, if the surface is not treated, its surface adhesion is not enough, and the coating is difficult to attach to the surface of aluminum alloy, even if the surface is coated, the coating is easy to fall off. Contents of the invention [0003] The technical problem to be solved in the present invention is to provide a pre-coating surface treatment process of aluminum alloy, which can make the surface adhesion of aluminum alloy better and the surface strength higher when coating. [0004] Technical scheme of the present invention is: [0005] A kind of surface treatment process before aluminum alloy coating, its specific ...

Claims

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Application Information

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IPC IPC(8): C23C22/78
Inventor 茹林宝
Owner ZHEJIANG HONGFENG ALUMINUM