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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: 2018-08-24
合肥市旺友门窗有限公司
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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

[0028] A kind of aluminum alloy surface treatment process, comprises the following steps:

[0029] (1) Sand blasting treatment: sandblasting the surface of the aluminum alloy substrate, the pressure of the sand blasting treatment is 0.22Mpa, and the particle size of the sand material is 100-200 mesh;

[0030] (2) Degreasing treatment: Put the aluminum alloy base material into the alkaline degreasing solution for degreasing treatment for 20 minutes, take it out, rinse with water for 10 minutes, and dry;

[0031] (3) Polishing treatment: Polishing the surface of the degreased aluminum alloy substrate, the polishing treatment method is: polishing with polishing solution for 30s at 105°C;

[0032] (4) Anodizing: Put the polished aluminum alloy substrate in a sulfuric acid electrolytic solution with a concentration of 15%, and place a high-compression carbon plate as a cathode in the electrolytic sulfuric acid solution for anodic oxidation treatment to obtain an anodic oxidation fi...

Embodiment 2

[0044] A kind of aluminum alloy surface treatment process, comprises the following steps:

[0045] (1) Sand blasting treatment: sandblasting the surface of the aluminum alloy substrate, the pressure of the sand blasting treatment is 0.28Mpa, and the particle size of the sand material is 100-200 mesh;

[0046] (2) Degreasing treatment: put the aluminum alloy base material into an alkaline degreasing solution for degreasing treatment for 30 minutes, take it out, rinse with water for 20 minutes, and dry;

[0047] (3) Polishing treatment: Polishing the surface of the degreased aluminum alloy substrate, the polishing treatment method is: polishing with polishing solution for 50s at 115°C;

[0048] (4) Anodizing: Put the polished aluminum alloy substrate in a sulfuric acid electrolytic solution with a concentration of 20%, and place a high-compression carbon plate as a cathode in the electrolytic sulfuric acid solution for anodic oxidation treatment to obtain an anodic oxidation fil...

Embodiment 3

[0060] A kind of aluminum alloy surface treatment process, comprises the following steps:

[0061] (1) Sand blasting treatment: sandblasting the surface of the aluminum alloy substrate, the pressure of the sand blasting treatment is 0.25Mpa, and the particle size of the sand material is 100-200 mesh;

[0062] (2) Degreasing treatment: Put the aluminum alloy base material into the alkaline degreasing solution for degreasing treatment for 25 minutes, take it out, rinse with water for 15 minutes, and dry;

[0063] (3) Polishing treatment: Polishing the surface of the degreased aluminum alloy substrate, the polishing treatment method is: polishing with polishing liquid for 40s at 110°C;

[0064] (4) Anodizing: Put the polished aluminum alloy substrate in a sulfuric acid electrolytic solution with a concentration of 17%, and place a high-compression carbon plate as a cathode in the electrolytic sulfuric acid solution for anodic oxidation treatment to obtain an anodic oxidation film...

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Abstract

The invention discloses an aluminum alloy surface treatment technology. The aluminum alloy surface treatment technology comprises the following steps: (1), performing sand blasting; (2), degreasing; (3), polishing: polishing the surface of a degreased aluminum alloy substrate by a polishing method comprising the step of polishing by using a polishing solution for 30-50s at 105-115 DEG C; (4), anodizing; (5), activating: activating the anodized aluminum alloy substrate by using an acid solution to dissolve an anodized film formed on the surface of the aluminum alloy substrate so as to increasethe porosity of the oxide film; (6), dyeing; (7), sealing holes: sealing the holes in the dyed aluminum alloy substrate. By the aluminum alloy surface treatment technology, a dense protective layer can be formed to protect aluminum alloy from chemical erosion and oxidation.

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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IPC IPC(8): C25D11/08C25D11/16C25D11/22C25D11/24
CPCC25D11/08C25D11/16C25D11/22C25D11/246
Inventor 朱明超
Owner 合肥市旺友门窗有限公司
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