Aluminum and aluminum alloy surface treatment method

A technology of aluminum alloy surface and treatment method, which is applied in the direction of surface reaction electrolytic coating, anodic oxidation, electrolytic coating, etc., can solve the problems of low surface hardness, intergranular corrosion and corrosion of aluminum and aluminum alloy, and achieve the reduction of friction coefficient, Enhanced corrosion ability and improved porous structure

Inactive Publication Date: 2014-03-26
GUANGXI POLYTECHNIC VOCATIONAL & TECHN COLLEGE
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  • Abstract
  • Description
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  • Application Information

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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, and the surface hardness is low and not wear-resistant.

Method used

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  • Aluminum and aluminum alloy surface treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As mentioned above, take the aluminum alloy base material and process it according to the following steps:

[0026] (1) Water washing: wash the aluminum alloy substrate with tap water for 2 minutes, and perform impurity and dust removal treatment;

[0027] (2) Degreasing treatment: put the aluminum alloy base material into a degreasing solution for degreasing treatment, wherein the degreasing solution is an aqueous cleaning solution with a weight content of 15%, and the degreasing solution contains sodium salt, surfactant and cleaning agent; sodium salt, surface The weight percentage of active agent and cleaning agent is 2:10:50; the sodium salt is trisodium phosphate and sodium silicate; the surfactant is sodium dodecylbenzenesulfonate, alkylphenol polyoxyethylene ether and dioctyl Sodium sulfosuccinate; The cleaning agent is trichlorethylene;

[0028] (3) Water washing: spray and wash the degreased aluminum alloy substrate for 2 minutes;

[0029] (...

Embodiment 2

[0038] Take the pure aluminum substrate and process it according to the following steps:

[0039] (1) Water washing: wash the pure aluminum substrate with tap water for 2 minutes, and perform impurity and dust removal treatment;

[0040] (2) Degreasing treatment: put the pure aluminum base material into a degreasing solution for degreasing treatment, wherein the degreasing solution is an aqueous cleaning solution with a weight content of 8%, and the degreasing solution contains sodium salt, surfactant and cleaning agent; sodium salt, surface The weight percentage of active agent and cleaning agent is 48:12:52; the sodium salt is trisodium phosphate and sodium silicate; the surfactant is sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether; cleaning The agent is trichloroethane;

[0041] (3) Water washing: spray and wash the degreased pure aluminum substrate for 2 minutes;

[0042] (4) Pickling: Soak the pure aluminum base material after step 3 in the acid sol...

Embodiment 3

[0051] Take the aluminum alloy substrate and process it according to the following steps:

[0052] (1) Water washing: wash the aluminum alloy substrate with tap water for 2 minutes, and perform impurity and dust removal treatment;

[0053] (2) Degreasing treatment: put the aluminum alloy base material into a degreasing solution for degreasing treatment, wherein the degreasing solution is an aqueous cleaning agent solution with a weight content of 10%, and the degreasing solution contains sodium salt, surfactant and cleaning agent; sodium salt, surface active agent The weight percentage of active agent and cleaning agent is 6:14:58; the sodium salt is trisodium phosphate, sodium silicate; the surfactant is sodium dodecylbenzenesulfonate, alkylphenol polyoxyethylene ether and di Sodium octyl sulfosuccinate; cleaning agents are trichloroethylene and trichloroethane.

[0054] (3) Water washing: spray and wash the degreased aluminum alloy substrate for 2 minutes;

[0055] (4) Pickl...

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Abstract

The invention discloses an aluminum and aluminum alloy surface treatment method which is characterized by comprising steps as follows: water washing, degreasing treatment, water washing, pickling, water washing, alkali washing, deionized water washing, anodic oxidation, water washing, PTFE (polytetrafluoroethylene) treatment, and drying. According to the aluminum and aluminum alloy surface treatment method, an aluminum and aluminum alloy oxide film with good uniformity can be obtained, and the film is high in hardness, abrasion-resistant, corrosion-resistant and the like.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a method for surface treatment 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 improved; Moreover, this layer of oxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/08C25D11/18
Inventor 张聪聪叶晟韦卫杰盛丹韦政韩祖丽
Owner GUANGXI POLYTECHNIC VOCATIONAL & TECHN COLLEGE
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