Surface treatment method of 3C product aluminum alloy outer parts and application

A surface treatment, aluminum alloy technology, applied in the direction of surface reaction electrolytic coating, anodizing, electrolytic coating, etc., can solve the problems of poor permeability of oxide film, difficult to obtain color, low gloss and so on
CN110306227AInactive Publication Date: 2019-10-08GUANGDONG INST OF MATERIALS & PROCESSING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG INST OF MATERIALS & PROCESSING
Publication Date
2019-10-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a surface treatment method of 3C product aluminum alloy outer parts. The method comprises following steps in sequence: an aluminum alloy outer part is subjected to surface mechanical pretreatment, machining tool marks and burrs are removed, and a flat surface is obtained; degreasing is performed to remove greasy dirt on the surface; alkali washing is performed to remove a natural oxidation film on the surface, and an activated aluminum matrix is exposed; acid washing is performed to remove dirty ash on the surface; chemical polishing is performed, and a bright and smoothsurface is obtained; anodic oxidation is performed, and an oxidation film with micropores is formed on the surface; colorizing is performed, and a dyeing agent is deposited to enter the micropores inthe oxidation film; and finally, hole sealing is performed, and the micropores in the oxidation film are sealed. With the adoption of the method for surface treatment, the oxidation film is transparent and bright, the pores in the film are small and dense, the film thickness is uniform, various gorgeous colors can be obtained after coloring and hole sealing, and the aluminum alloy outer part hasexcellent attractive decorative effect and excellent wear resistance and corrosion resistance. The invention further provides an application of the surface treatment method to the 3C product aluminumalloy outer parts such as a smartphone and a tablet computer.
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Description

technical field

[0001] The invention belongs to the technical field of aluminum alloy surface treatment, and in particular relates to a surface treatment method and application of an aluminum alloy appearance part of a 3C product. Background technique

[0002] Aluminum alloy has the advantages of light weight, high strength, good heat dissipation, oxidative coloring, recyclability, and unique metal texture. It is widely used in the appearance of 3C products such as tablets, smart phones, mobile power supplies, digital cameras, and walkmans. Components, such as backplanes, middle frames and borders, etc. However, the surface hardness of aluminum alloy is low, and the surface is easily worn during use. Normally, a layer of natural oxide film is formed on the surface of the aluminum alloy, which has a certain resistance to corrosion, but the natural oxide film is very thin and soft, and is easily damaged and loses its protective effect on the aluminum alloy.

[0003] In order...

Claims

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