Aluminum alloy surface enamel-imitating structure Ni-W coating and preparation method thereof

By forming a Ni-W coating with a hybrid nanocrystalline and amorphous structure on the surface of aluminum alloy through ultrasonic-assisted electrodeposition, the problems of insufficient adhesion and uneven performance of traditional coatings are solved, and high wear resistance and corrosion resistance of aluminum alloy surfaces are achieved.

CN120830136AActive Publication Date: 2025-10-24中国石油集团工程材料研究院有限公司 +1
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Patent Information

Application Number
CN202511341965.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-19
Publication Date
2025-10-24
Estimated Expiration
2045-09-19

AI Technical Summary

Technical Problem

Traditional Ni-W coatings suffer from uncontrollable amorphization when deposited on aluminum alloy surfaces, resulting in poor coating quality, insufficient adhesion, and uneven performance, which affects the wear resistance and corrosion resistance of aluminum alloys.

Method used

An ultrasonic-assisted electrodeposition method was used to form a Ni-W coating with a mixed nanocrystalline and amorphous structure on the surface of an aluminum alloy. By adjusting the current density and additive concentration, the distribution of crystals and amorphous materials in the coating was controlled to form a tooth-like enamel structure, thereby improving the adhesion and wear resistance of the coating.

Benefits of technology

It achieves uniform coating distribution and high adhesion, significantly improving the wear resistance and corrosion resistance of aluminum alloys, and enhancing the overall performance of aluminum alloy pipes.

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Abstract

The invention discloses an enamel-imitating structure Ni-W coating on the surface of aluminum alloy and a preparation method of the enamel-imitating structure Ni-W coating, and belongs to the technical field of metal material surface modification. The enamel-imitated Ni-W coating on the surface of the aluminum alloy is of a mixed structure of nanocrystals and non-crystals, and the content of the non-crystals on the inner layer of the Ni-W coating combined with the surface of the aluminum alloy is lower than that of the non-crystals on the outer surface of the Ni-W coating. The Ni-W coating is of a mixed structure in which nanocrystals and non-crystals are uniformly distributed and has the characteristics of fine crystal grains, high density, low porosity and the like, the proportion of amorphous particles on the outer surface layer of the Ni-W coating is relatively high, the corrosion resistance and the wear resistance of the coating are improved, the proportion of crystal particles on the inner layer combined with aluminum alloy is relatively high, and the corrosion resistance and the wear resistance of the coating are improved. The aluminum alloy pipe is high in crystal form adaptability with aluminum alloy and good in binding force, the mixed structure has hardness and toughness, and the corrosion resistance, abrasion resistance and other performance of the aluminum alloy pipe in various application scenes are greatly improved.
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Citation Information

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