Method for preparing Al-Al2O3-TPU mixed corrosion-resistant coating through low-pressure cold spraying and application of Al-Al2O3-TPU mixed corrosion-resistant coating

Through low-pressure cold spraying technology, Al powder, Al2O3 ceramic particles and TPU powder are mixed and sprayed, which solves the problems of pores and cracks in traditional coating preparation technology, and achieves efficient and environmentally friendly coating preparation, which is suitable for harsh environments such as marine engineering.

CN119663266AActive Publication Date: 2025-03-21LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202411536724.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-31
Publication Date
2025-03-21
Estimated Expiration
2044-10-31

AI Technical Summary

Technical Problem

Traditional corrosion-resistant coating preparation technology has problems of pores and cracks, and the high-temperature spraying process consumes high energy and is seriously polluted, making it difficult to meet the demands of harsh environments such as marine engineering.

Method used

Low-pressure cold spraying technology is used to mechanically mix Al powder, Al2O3 ceramic particles and TPU powder, and low-pressure cold spraying is applied to the substrate to form an Al-Al2O3-TPU mixed corrosion-resistant coating.

Benefits of technology

It realizes the preparation of dense and uniform coatings at lower temperatures, improves the adhesion and corrosion resistance of the coating, reduces energy consumption and environmental pollution, and is suitable for various application environments such as marine engineering.

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Abstract

The invention provides a method for preparing an Al-Al2O3-TPU (Thermoplastic Polyurethane) mixed corrosion-resistant coating through low-pressure cold spraying, which comprises the following steps: carrying out surface treatment on a base material, and sequentially grinding, polishing, cleaning, drying and sandblasting to obtain a base material to be sprayed; the preparation method comprises the following steps: mechanically mixing Al powder, Al2O3 ceramic particles and thermoplastic polyurethane (TPU) powder to obtain cold spraying prefabricated powder; and the cold spraying prefabricated powder is subjected to low-pressure cold spraying to a to-be-sprayed base material, after the coating is cooled and cured, polishing and correction are conducted, and the Al-Al2O3-TPU mixed corrosion-resistant coating is obtained. The prepared coating is good in compactness and uniformity, has good mechanical performance and corrosion resistance, can be applied to the ocean engineering environment and can resist seawater scouring and corrosion.
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