Corrosion-resistant aluminum alloy profile and preparation method thereof

By optimizing the composition of the aluminum alloy substrate and forming a corrosion-resistant coating on its surface, combined with laser cladding technology and extrusion treatment, the problem of insufficient corrosion resistance when improving strength is solved, and the comprehensive performance of high corrosion resistance and high strength is achieved.

CN120505548AActive Publication Date: 2025-08-19广东豪美技术创新研究院有限公司 +1
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Patent Information

Application Number
CN202510673389.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-23
Publication Date
2025-08-19
Estimated Expiration
2045-05-23

AI Technical Summary

Technical Problem

While increasing the strength of existing aluminum alloy profiles, plastic toughness and corrosion resistance are reduced, resulting in easy corrosion and oxidation in complex environments, affecting service life.

Method used

By optimizing the composition of the aluminum alloy substrate and forming a corrosion-resistant coating on its surface, the coating consists of nickel powder, boron nitride, lanthanum oxide and ceria, formed by laser cladding technology, combined with three-stage extrusion treatment, the tissue structure is regulated and adhesion is improved.

Benefits of technology

It significantly improves the corrosion resistance and mechanical properties of aluminum alloy profiles, enhances the adhesion and wear resistance of the coating, reduces pores and cracks, and ensures the apparent quality of the material.

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Abstract

The invention discloses a corrosion-resistant aluminum alloy profile and a preparation method thereof, and belongs to the technical field of aluminum alloy profiles. By optimizing the components of the corrosion-resistant aluminum alloy, the strength of the aluminum alloy profile can be guaranteed, and the corrosion resistance of the aluminum alloy profile is positively influenced. Besides, the corrosion-resistant coating is formed on the surface of the corrosion-resistant aluminum alloy base material in a laser cladding mode, the corrosion resistance of the aluminum alloy profile can be remarkably improved while the application performance of the aluminum alloy profile is guaranteed, and in the corrosion-resistant coating, nickel powder can enhance pitting corrosion resistance and intergranular corrosion resistance, so that the corrosion resistance of the aluminum alloy profile is improved. The adhesive force with an aluminum alloy base material is improved; the boron nitride can improve the acid resistance and wear resistance of the surface of the aluminum alloy profile and block a corrosion channel; the lanthanum oxide and the cerium dioxide have a synergistic effect, so that surface grains can be refined, air holes generated in the cladding process are reduced, the compactness of the coating is improved, the compatibility with an aluminum alloy base material is promoted, and the apparent quality of the aluminum alloy profile is guaranteed.
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