Aluminum alloy surface treatment technology

A technology of aluminum alloy surface and treatment process, which is applied in the field of metal surface treatment, can solve the problems that the wear resistance of the aluminum alloy conversion film layer has not been greatly improved, the intergranular corrosion of aluminum and aluminum alloy, and the low surface hardness, etc., to achieve Improved corrosion resistance, low production cost, and fast production speed

Inactive Publication Date: 2018-02-02
ANHUI HUOSHAN LONGXIN METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used method now is the anodic oxidation method, which forms a conversion film on the surface of the aluminum alloy by an electrochemical method. Although this method can improve the corrosion resistance of the aluminum alloy, the wear resistance of the aluminum alloy conversion film layer has not been greatly improved; Moreover, this layer of oxide film is easily corroded by strong acid and strong alkali. At the same time, aluminum and aluminum alloys are prone to intergranular corrosion, and the surface hardness is low and not wear-resistant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of aluminum alloy surface treatment process, is characterized in that, comprises the following steps:

[0030] (1) Sandblasting treatment: use zirconium corundum abrasives to perform sandblasting treatment on the aluminum alloy surface to remove the oxide skin on the aluminum alloy surface;

[0031] (2) Degreasing treatment: Put the aluminum alloy substrate into the degreasing solution for degreasing treatment, take it out for 25 minutes, rinse with water for 40 seconds, and dry;

[0032] (3) Anodizing: Put the dried aluminum alloy base material in a sulfuric acid electrolytic solution with a concentration of 15-20%, and use a high-compression carbon plate as the cathode in the electrolytic sulfuric acid solution for yin and yang electrolysis;

[0033] (4) Washing: Spray and wash the aluminum alloy substrate after anodic oxidation to remove the sulfuric acid electrolytic solution on the surface of the aluminum alloy substrate;

[0034] (5) Activation treatment: ...

Embodiment 2

[0046] A kind of aluminum alloy surface treatment process, is characterized in that, comprises the following steps:

[0047] (1) Sandblasting treatment: use zirconium corundum abrasives to perform sandblasting treatment on the aluminum alloy surface to remove the oxide skin on the aluminum alloy surface;

[0048] (2) Degreasing treatment: Put the aluminum alloy substrate into the degreasing solution for degreasing treatment, take it out for 20 minutes, rinse with water for 30 seconds, and dry;

[0049] (3) Anodizing: Put the dried aluminum alloy base material in a sulfuric acid electrolytic solution with a concentration of 15-20%, and use a high-compression carbon plate as the cathode in the electrolytic sulfuric acid solution for yin and yang electrolysis;

[0050] (4) Washing: Spray and wash the aluminum alloy substrate after anodic oxidation to remove the sulfuric acid electrolytic solution on the surface of the aluminum alloy substrate;

[0051] (5) Activation treatment: ...

Embodiment 3

[0063] A kind of aluminum alloy surface treatment process, is characterized in that, comprises the following steps:

[0064] (1) Sandblasting treatment: use zirconium corundum abrasives to perform sandblasting treatment on the aluminum alloy surface to remove the oxide skin on the aluminum alloy surface;

[0065] (2) Degreasing treatment: Put the aluminum alloy substrate into the degreasing solution for degreasing treatment, take it out for 30 minutes, rinse with water for 50 seconds, and dry;

[0066] (3) Anodizing: Put the dried aluminum alloy base material in a sulfuric acid electrolytic solution with a concentration of 15-20%, and use a high-compression carbon plate as the cathode in the electrolytic sulfuric acid solution for yin and yang electrolysis;

[0067] (4) Washing: Spray and wash the aluminum alloy substrate after anodic oxidation to remove the sulfuric acid electrolytic solution on the surface of the aluminum alloy substrate;

[0068] (5) Activation treatment: ...

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PUM

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Abstract

The invention discloses an aluminum alloy surface treatment technology. The aluminum alloy surface treatment technology comprises the following steps of (1) blasting treatment, specifically, blastingtreatment is conducted on the aluminum alloy surface by utilizing a fused zirconia alumina grinding material, so that oxide skin on the aluminum alloy surface is removed; (2) degreasing treatment, specifically, degreasing treatment is conducted in a degreasing solution; (3) anodic oxidation, specifically, an aluminum alloy base material is placed in a sulfuric acid electrolytic solution with the concentration being 15-20%, and a highly compressed carbon plate serves as a cathode and is placed in the sulfuric acid electrolytic solution to be subjected to anode-cathode electrolysis; (4) water scrubbing; (5) activation treatment; (6) dyeing treatment; and (7) hole sealing treatment. By adopting the aluminum alloy surface treatment technology, a compact protection layer can be formed to protect an aluminum alloy from being corroded and oxidated chemically.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an aluminum alloy surface treatment process. Background technique [0002] Aluminum alloy has the advantages of good electrical conductivity, fast heat transfer, light specific gravity, and easy forming, and has become one of the most widely used metals. Aluminum is a kind of active metal, and the oxide film is easy to form on the surface. The oxide film is loose, porous, uneven and discontinuous, and cannot be used as a protective layer on the aluminum surface. Therefore, it is necessary to prepare a protective layer on the surface of aluminum and aluminum alloys to achieve rust prevention. Purpose. The commonly used method now is the anodic oxidation method, which forms a conversion film on the surface of the aluminum alloy by an electrochemical method. Although this method can improve the corrosion resistance of the aluminum alloy, the wear resistance of the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/16C25D11/22C25D11/24
CPCC25D11/08C25D11/16C25D11/22C25D11/246
Inventor 华玲玲
Owner ANHUI HUOSHAN LONGXIN METAL TECH CO LTD
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