Antiseptic treatment method for surfaces of aluminum and aluminum alloy and products thereof

Abstract

The invention provides an antiseptic treatment method for surfaces of aluminum and an aluminum alloy, which comprises the following steps: providing an aluminum base body; conducting chemical degreasing on the aluminum base body; preparing a cerium-doped silane hybridization film on the aluminum base body by adopting a sol-gel method; and forming a ceramic coating composed of an infusible compound on the cerium-doped silane hybridization film through a vacuum coating method. Aluminum products obtained through the antiseptic treatment method comprises the aluminum body, the cerium-doped silane hybridization film formed on the surface of the aluminum base body and the ceramic coating composed of the infusible compound and formed on the cerium-doped silane hybridization film.

Description

technical field [0001] The invention relates to a method for anticorrosion treatment of aluminum and aluminum alloy surfaces and products thereof. Background technique [0002] Aluminum alloy has the advantages of light weight and good heat dissipation performance, and is widely used in communication, electronics, transportation, construction, aerospace and other fields. In the air, an aluminum oxide protective film will be formed on the surface of aluminum alloy. In the general atmospheric environment, the aluminum oxide film on the surface of aluminum alloy can effectively protect the aluminum alloy substrate, but in the moisture containing electrolyte, such as the ocean surface atmosphere The surface of aluminum alloy is prone to pitting corrosion, which seriously damages the appearance of aluminum alloy products and shortens the service life of products. [0003] Salt spray corrosion resistance is an important parameter for the corrosion resistance of aluminum alloys. I...

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Problems solved by technology

In the air, an aluminum oxide protective film will be formed on the surface of aluminum alloy. In the general atmospheric environment, the aluminum oxide film on the surface of aluminum alloy can effectively protect the aluminum alloy substrate, but in the moisture containing electrolyte, such as the ocean surface atmosphere environment, the surface of aluminum alloy is prone to pitting corrosion, which seriously damages the appearance of aluminum alloy products and shortens the service life of products

[0003] Salt spray corrosion resistance is an important parameter for the corrosion resistance of aluminum alloys. In order to improve the salt spray corrosion resistance of aluminum alloys, it is usually necessary to perform surface film-forming treatment on the surface of aluminum alloys. Common treatment methods include anodic oxidation treatment, baking paint, etc. , but these processes have relatively large environmental pollution problems

Although the vacuum coating (PVD) technology is a very environmentally friendly coating process, and it can be coated with a variety of coatings and excellent wear resistance, but the surface of the aluminum alloy usually has many small depressions or pores, and PVD process deposition The film layer usually has a profiling structure on the surface of the substrate, and the film layer deposited in these depressions or voids is often thinner in other areas, so pitting corrosion is often more likely to occur in the depressions or void areas in the salt spray test, resulting in the film being unable to Effectively prevent the erosion of salt spray, that is, the corrosion resistance is poor

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