A thermal spray coating sealant and method of making the same

By using a combination of terpene resin, turpentine, and zinc phosphate as a sealing agent, the corrosion problem of thermal spray coatings in high-salt and high-humidity environments was solved, achieving long-term improvement in the coating's corrosion resistance and extending its service life.

CN122326115APending Publication Date: 2026-07-03NANTONG RUISHENG NEW MATERIAL TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202610479272.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-13
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing thermal spray coatings are prone to cracking and porosity defects in high-salt and high-humidity marine environments, leading to accelerated corrosion. Traditional organic sealing agents are insufficient in abrasion resistance and corrosion resistance, making it difficult to effectively extend the coating life.

Method used

A combination of terpene resin, turpentine oil, and zinc phosphate was used as the raw materials for the sealing agent. The sealing agent was prepared by stirring and mixing, and then coated onto the surface of the thermal spray coating to form a sealing layer with high adhesion, which inhibits the regeneration of cracks and pore defects.

Benefits of technology

It significantly improves the long-term corrosion resistance of thermal spray coatings in high-salt and high-humidity environments, reduces corrosion current density and passivation current density by two orders of magnitude, and extends the service life of the coating.

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Abstract

This invention discloses a sealing agent for thermal spray coatings and its preparation method. The sealing agent comprises the following components: 6-10 parts terpene resin, 10-25 parts turpentine oil, 1-5 parts zinc phosphate, 3-16 parts organic solvent, and 5-15 parts propylene glycol butyl ether. The preparation method is as follows: under continuous heating, turpentine oil is added to the organic solvent and stirred for the first time to obtain a first solution; then, terpene resin and zinc phosphate are added to the first solution, and stirred for the second time to obtain a second solution; finally, propylene glycol butyl ether is added to the second solution, and stirred for the third time to obtain the sealing agent. The sealing agent can be used to seal thermal spray coatings. This invention introduces terpene resin, zinc phosphate, and turpentine oil as raw materials for the sealing agent, significantly improving the long-term corrosion resistance of thermal spray coatings in high-salt and high-humidity environments.
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