Preparation and properties of high-temperature (600 ℃) and corrosion-resistant coatings

Organic silicon high-temperature resistant coatings have a wide range of applications in many fields. However, due to the cracking of organic silicon resin at high temperatures, the corrosion resistance of organic silicon high temperature-resistant coatings decreases after heating, and they cannot meet the requirements of some harsh application scenarios. In order to address the above problems, a two-component titanium ester-modified siloxane resin was used as a film-forming material, combined with reactive fillers, low-melting fillers and anti-corrosion fillers to prepare a high temperature (600 ℃) and corrosion-resistant coating. Heat resistance tests demonstrated that the resulting coatings can withstand heating for more than 500 hours at 600 ℃. In other tests, the coatings demonstrated a resistance to neutral salt spray and heat and humidity for over 1200 hours, both before and after heat resistance tests. Optical microscopy and electrochemical impedance spectroscopy revealed the mechanism of temperature and corrosion-resistance. These coatings exhibit excellent heat resistance and corrosion resistance, and have potential for a long service life in high-temperature and corrosive environments.