Anode treatment method of aluminium alloy

Abstract

An anode treatment method of aluminium alloy is used for coloring treatment of die castings of aluminium alloy. The method comprises the following steps: (1) providing a die casting of the aluminium alloy for pre-treating; (2) using an anodized polishing liquid for chemical polishing of the die casting of the aluminium alloy; (3) performing a first glaring treatment for the chemically polished die casting of the aluminium alloy; (4) performing a second glaring treatment for the die casting of the aluminium alloy; (5) dipping the die casting of the aluminium alloy with the second glaring treatment in an acid storage, and electrifying for the anode oxidation treatment; (6) putting the die casting of the aluminium alloy into a staining solution to dye in accordance with required colors; and (7) immersing the dyed die casting of the aluminium alloy into a sealant to seal pores. The anode treatment method of the aluminium alloy can produce uniform-color die-casted aluminum alloy products which can be colored with various colors.

Description

【Technical field】 [0001] The invention relates to an aluminum alloy anodic treatment method, in particular to a surface treatment method for anodic coloring of aluminum alloy die castings. 【Background technique】 [0002] Anodic treatment is a widely used surface treatment technology. It is a surface treatment technology that has long been used in electrochemistry. Anodized treatment is generally used in: A. Increase corrosion resistance; B. Increase wear resistance; C , Improve the adhesion between the substrate and the coating; D, provide an insulating surface; E, heat dissipation; F, protect the polished and machined surface; G, improve the appearance, etc. [0003] At present, the anodic oxidation treatment seen on the market is mostly used in aluminum, aluminum alloy sheet or extruded profile products, and aluminum die castings are more and more widely used recently, such as radiators, automobile fasteners and other products, but due to aluminum alloy Die-casting materi...

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Problems solved by technology

[0003] At present, the anodic oxidation treatment seen on the market is mostly used in aluminum, aluminum alloy sheet or extruded profile products, and aluminum die castings are more and more widely used recently, such as radiators, automobile fasteners and other products, but due to aluminum alloy Die-casting materials contain many metal elements, such as copper, silicon, iron and other special metal components, which make the metal structure of die-casting uneven, making it difficult to obtain samples with uniform color after anodizing the surface of aluminum die-casting parts, and the yield rate is relatively low, which limits its widespread use

[0004] Chinese patent CN200810155521.9 discloses an anodic oxidation surface treatment process for aluminum alloy die castings. In this method, it is mentioned that the aluminum alloy die casting process, sandblasting process and anodic oxidation surface treatment process can be ideally applied in aerospace The aluminum alloy die-casting parts of the product, but the related coloring treatment technology is not mentioned

Chinese patent CN200510018682.X discloses a bronze coloring process of die-casting aluminum alloy, which only mentions the bronze coloring process of die-casting aluminum alloy, and the color is relatively single, and how to deal with other colors is not mentioned

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