Preparation method for golden aluminum alloy conductive oxidation film

Abstract

The invention relates to the technical field of aluminum alloy conductive oxidation films, in particular to a preparation method for a golden aluminum alloy conductive oxidation film. The preparation method comprises the steps that impurities are removed through gasoline; soaking is conducted through a sodium hydroxide solution for degreasing; washing is conducted, and soaking is conducted through a nitric acid solution for bright dipping; washing is conducted, and then anodic oxidation is conducted; and washing, dyeing, washing, drying, packaging and the like are conducted, and the compact protecting film is formed on the surface of an aluminum alloy material. Oxidation film holes are formed in the film, so that the color of the surface of the dyed aluminum alloy material is uniform, and the dyeing consistency of the aluminum alloy material is improved; in addition, the thickness of the oxidation film is 0.005-0.008 micrometer, the corrosion resistance of the aluminum alloy material is effectively improved, and it is guaranteed to the greatest extent that the conductivity of the aluminum alloy material is good, so that the surface contact resistance of the aluminum alloy material is 21.7-22.1 m omega.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy conductive oxide film, in particular to a method for preparing an aluminum alloy golden yellow conductive oxide film. Background technique [0002] Aluminum is a relatively active metal, its standard potential is -1.706V, and it is corrosion-resistant in the atmospheric environment. In the production of the aerospace industry, it is necessary to add some trace metal elements to the aluminum material to improve the strengthening effect of the aluminum material. After increasing the strength of the aluminum material, it is used as a raw material; however, as the hardness of the aluminum material increases, its corrosion resistance The performance is greatly reduced, which in turn leads to a shorter service life of the aluminum material, which affects the performance of the equipment and causes potential safety hazards. [0003] At present, in order to ensure that the aluminum alloy material ...

AI Technical Summary

Problems solved by technology

[0005] However, according to the existing technology and the technology adopted by aluminum alloy oxidation treatment manufacturers and the products produced, it is all through chemical oxidation treatment on the surface of aluminum alloy, so that the color of the surface of the film layer appears as an iridescent film layer ; and there are also researchers who use electrochemical oxidation treatment on the surface of aluminum alloy, and then dye it, but due to the inaccurate selection of raw materials and parameter limitations in the treatment process, the surface effect of the obtained aluminum alloy product is poor. In particular, the color is poor, which makes it more difficult to treat the surface of the aluminum alloy material into a golden yellow conductive film layer.

[0006] In addition, due to the aluminum alloy oxidation and dyeing treatment in the prior art, due to improper treatment in the aluminum alloy oxidation treatment process, the thickness of the oxide film formed on the aluminum alloy surface is relatively large, which in turn makes the aluminum alloy surface The resistance is large, which makes it close to the insulating state and loses the conductivity of the aluminum alloy; not only that, in the process of oxide film treatment in the prior art, because a uniform dense porous state is not formed on the surface of the aluminum alloy protective layer, resulting in During the dyeing process, it is difficult to form a uniform color on the surface, which leads to the formation of multiple color bands on the surface of the aluminum alloy material, which reduces the appearance of the aluminum alloy surface after dyeing.