High temperature resistant anti-corrosion coating and its preparation method

Abstract

The invention relates to a high-temperature resistant and anticorrosive coating and a preparation method thereof. The coating uses organic phosphate and isocyanate modified epoxy organic siliconresin as main materials. The epoxy organic siliconresin has good high-temperature resistant and anticorrosive performance; the introduction of organic phosphate radical not only can improve the high-temperature resistant performance of the resin, but also can improve the anticorrosive performance of the later period of the coating; during the film forming process of the coating, the organic phosphate radical and substrate metal can form a compact phosphate protecting film to lead the surface of the metal to be passivated so as prevent water molecules and salt ions from being contacted with the metal, thus leading the coating to have good anticorrosive function; isocyanate radical is introduced and reacts with epoxy radical to generate high-temperature resistant polyoxazolidine radical, thus improving the high-temperature resistant performance of the coating; the modified epoxy organic siliconresin is used by being matched with a high-temperature resistant pigment, thus leading the coating to be capable of not only keeping proper physical and mechanical performances, but also having good anticorrosive performance under the environment of high temperature of 550 DEG C.

Description

technical field [0001] The invention relates to a high-temperature-resistant anti-corrosion paint, in particular to a modified epoxy organic silicon anti-corrosion paint resistant to a high temperature of 550°C and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of high-tech, the requirements for high-temperature-resistant structural materials and high-temperature-resistant coatings have become higher and higher. Practice has proved that high-temperature structural materials must have good high-temperature strength and excellent anti-corrosion properties. Oxidation and corrosion resistance are more difficult and expensive. In contrast, high-temperature-resistant coatings have the above two advantages, which can not only improve the high-temperature resistance of materials, but also have certain corrosion resistance. Therefore, since the 1950s, people's research on high temperature resistant coatings has been in the asc...

AI Technical Summary

Problems solved by technology

Patent 200710098668.4 discloses an epoxy silicone anti-corrosion coating, the cumulative time of salt spray can reach up to 360h, and the corrosion resistance is excellent, but the heat resistance and corrosion resistance have not been improved at the same time