Processing method capable of improving surface strength of aluminum and aluminum alloy

A technology of aluminum alloy surface and treatment method, applied in the direction of surface reaction electrolytic coating, anodic oxidation, electrolytic coating, etc. Corrosion of strong acids and alkalis, intergranular corrosion of aluminum and aluminum alloys, etc., to shorten the preparation time, improve convenience and effect, and enhance quality

Inactive Publication Date: 2016-08-31
刘洪建
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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, the surface hardness is low, and they are not wear-resistant; Big

Method used

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Embodiment Construction

[0022] A treatment method for improving the surface strength of aluminum and aluminum alloys, comprising the steps of:

[0023] (1) One-time water washing: wash the aluminum or aluminum alloy materials with clean water to remove impurities and dust;

[0024] (2) Degreasing treatment: put the aluminum or aluminum alloy material into the degreasing solution, heat to keep the temperature of the degreasing solution at 38-40°C, and complete the degreasing treatment after 20-25 minutes; the degreasing solution consists of the following substances by weight: 5 parts of sodium nitrilotriacetate, 4 parts of sodium silicate, 3 parts of alkylphenol polyoxyethylene ether, 15 parts of sodium tripolyphosphate, 3 parts of octylphenol polyoxyethylene ether, 300 parts of water;

[0025] (3) Secondary water washing: wash the degreased aluminum or aluminum alloy materials with clean water, and dry them for later use;

[0026] (4) Primary pickling: Put the aluminum or aluminum alloy material tre...

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Abstract

The invention discloses a processing method capable of improving the surface strength of aluminum and aluminum alloy. The processing method includes the following steps of (1) primary washing, (2) ungrease treatment, (3) secondary washing, (4) primary acid pickling, (5) secondary acid pickling, (6) alkali washing, (7) anodic oxidation, (8) third-time washing and (9) drying and heat preservation. All the steps of the processing method are scientific, reasonable and ingenious in process. The structure of surface oxidation films of an aluminum or aluminum alloy material is effectively improved, the strong acid resistance, strong base resistance and organic solvent corrosion resistance are improved obviously, and the surface strength is improved by 20%-25%. Furthermore, a special cellular structure is achieved, the deep processing technique like dyeing is facilitated, and the use value is good.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a treatment method for improving the surface strength of aluminum and aluminum alloys. Background technique [0002] Aluminum and aluminum alloys have a series of advantages such as low density, high specific strength, good corrosion resistance and formability, and low cost. Has a wide range of applications. [0003] There are many surface treatment methods for aluminum and aluminum alloys. At present, physical methods, chemical methods, physical chemical methods and comprehensive methods are relatively mature and widely used. 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 improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06C25D11/16C23G1/12
CPCC23G1/125C25D11/06C25D11/16
Inventor 刘洪建
Owner 刘洪建
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