Inorganic ultrahigh-temperature-resistant anti-corrosion anti-oxidation coating and preparation method thereof

A composite inorganic binder was prepared by combining modified inorganic sol with aluminum dihydrogen phosphate, and combined with fillers such as nano-rare earth oxides. This solved the application problems of existing coatings in high-temperature fields, and achieved the stability and protective effect of the coating at high temperatures. It is suitable for metal protection in high-temperature environments.

CN121895791APending Publication Date: 2026-04-21JILIN ASIA PACIFIC ARK TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610173494.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-06
Publication Date
2026-04-21

AI Technical Summary

Technical Problem

Existing inorganic high-temperature protective coatings face difficulties in application in high-temperature fields above 2000°C, and the application of large and complex components is challenging. Furthermore, the high cost of existing coating materials makes it difficult to achieve large-scale industrial application.

Method used

An inorganic ultra-high temperature resistant coating was prepared by using a modified inorganic sol and aluminum dihydrogen phosphate composite as the base material, combined with nano-rare earth oxides, ultrafine refractory oxides, refractory carbides and other fillers, and supplemented with functional additives and deionized water.

Benefits of technology

The coating exhibits good mechanical strength at temperatures above 2500°C, and shows no peeling after being tested with a flame at 4 times the speed of sound. It is suitable for metal protection in high-temperature environments, providing high-temperature self-healing properties, good heat transfer performance, and anti-oxidation properties.

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Abstract

The invention discloses an inorganic ultrahigh-temperature-resistant anti-corrosion anti-oxidation coating and a preparation method thereof, and relates to the technical field of high-temperature-resistant protective paints.The inorganic ultrahigh-temperature-resistant anti-corrosion anti-oxidation coating is prepared through the steps that nanometer rare earth oxide, superfine refractory oxide with the melting point being 3000 DEG C or above, refractory carbide, refractory boride and the like are used as filler, and under the cooperation of multiple functional auxiliaries and deionized water, the inorganic ultrahigh-temperature-resistant anti-corrosion anti-oxidation coating is prepared; the inorganic ultrahigh-temperature-resistant anti-corrosion and anti-oxidation coating is prepared. The high temperature resistance of the coating is greater than or equal to 2500 DEG C, and the coating still has certain mechanical strength when the high temperature reaches 3000 DEG C. The coating of the paint is tested by 4-time sound velocity flame (namely 4-Mach velocity flame) for 5 minutes, the coating is intact and has no damage phenomena such as falling off, and a metal body is well protected.
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