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Aluminum alloy surface passivation treatment method

A technology of aluminum alloy surface and passivation treatment, which is applied in the field of aluminum alloy processing, can solve problems such as strong toxicity, carcinogenicity, and dangerous air pollutants, and achieve the effects of improving oxidation resistance, prolonging service life, and excellent mechanical properties

Pending Publication Date: 2018-01-16
ANHUI HUOSHAN LONGXIN METAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the hexavalent chromium passivation film has good corrosion resistance and beautiful appearance, hexavalent chromium is a highly toxic substance and is recognized as a carcinogen and a dangerous air pollutant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for passivating the surface of an aluminum alloy according to a preferred embodiment of the present invention comprises the following steps:

[0027] (1) Surface pretreatment: Grinding and polishing the surface of the aluminum alloy, and then degreasing treatment for standby;

[0028] (2) Oxidation treatment: the aluminum alloy that has undergone surface pretreatment is used as the anode, and placed in the electrolyte for electrolysis, so that a uniform aluminum oxide film is formed on the surface of the aluminum alloy, dried and set aside;

[0029] (3) Passivation treatment: the surface of the aluminum alloy prepared in step (2) is coated with a passivation paint, and then the surface is dried to obtain the aluminum alloy after the passivation treatment.

[0030] Among them, the method of degreasing treatment in the step (1) is to first place the aluminum alloy material in water added with an alkaline cleaning agent, and ultrasonically soak it for 15 minutes u...

Embodiment 2

[0040] A method for passivating the surface of an aluminum alloy according to a preferred embodiment of the present invention comprises the following steps:

[0041] (1) Surface pretreatment: Grinding and polishing the surface of the aluminum alloy, and then degreasing treatment for standby;

[0042] (2) Oxidation treatment: the aluminum alloy that has undergone surface pretreatment is used as the anode, and placed in the electrolyte for electrolysis, so that a uniform aluminum oxide film is formed on the surface of the aluminum alloy, dried and set aside;

[0043] (3) Passivation treatment: the surface of the aluminum alloy prepared in step (2) is coated with a passivation paint, and then the surface is dried to obtain the aluminum alloy after the passivation treatment.

[0044] Among them, the method of degreasing treatment in the step (1) is to first place the aluminum alloy material in water added with an alkaline cleaning agent, and ultrasonically soak it for 10 minutes u...

Embodiment 3

[0054] A method for passivating the surface of an aluminum alloy according to a preferred embodiment of the present invention comprises the following steps:

[0055] (1) Surface pretreatment: Grinding and polishing the surface of the aluminum alloy, and then degreasing treatment for standby;

[0056] (2) Oxidation treatment: the aluminum alloy that has undergone surface pretreatment is used as the anode, and placed in the electrolyte for electrolysis, so that a uniform aluminum oxide film is formed on the surface of the aluminum alloy, dried and set aside;

[0057] (3) Passivation treatment: the surface of the aluminum alloy prepared in step (2) is coated with a passivation paint, and then the surface is dried to obtain the aluminum alloy after the passivation treatment.

[0058] Among them, the method of degreasing treatment in the step (1) is to first place the aluminum alloy material in water added with an alkaline cleaning agent, and ultrasonically soak it for 20 minutes u...

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PUM

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Abstract

The invention discloses an aluminum alloy surface passivation treatment method and belongs to the technical field of aluminum alloy processing. A treated aluminum alloy material is prepared through steps as follows: (1) surface pretreatment; (2) oxidation treatment; (3) passivation treatment. The aluminum alloy surface passivation treatment method has the characteristics of being simple, mild in process condition and convenient to operate; a passivated aluminum alloy has better oxidation resistance and corrosion resistance, the service life of the aluminum alloy is greatly prolonged, conditions are provided for promotion and application of the aluminum alloy, and the aluminum alloy surface passivation treatment method has better application value.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy surface passivation treatment method. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal material in the industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, and chemical industries. With the rapid development of science and technology and industrial economy, the demand for aluminum alloy welded structural parts is increasing, and the research on the weldability of aluminum alloys is also in-depth. Aluminum alloys are widely used in industries such as automobiles, motorcycles, aircraft and ships. However, the corrosion resistance of aluminum is weak, and anti-corrosion treatment of its surface is a necessary process. Passivation is one of the most widely used and effective anti-corrosion treatment methods. At present, most domestic enterprises choose the tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/24C23C22/68C23C22/76
Inventor 华玲玲
Owner ANHUI HUOSHAN LONGXIN METAL TECH CO LTD
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