Preparation and properties of GO-SiO₂ anticorrosive coatings

Abstract

Epoxy resin is often used as raw material of anticorrosion, but in the curing process of resin, a large number of micropores are prepared in the solvent evaporation method, which reduces the performance of anticorrosion. In order to reduce internal defects and improve corrosion resistance, GO was compounded with SiO2 modified by KH550 to prepare for GO-SiO2. By means of mechanical stirring and ultrasonic dispersion, GO-SiO2 was added to epoxy resin to prepare for the anticorrosive coating. SEM was used to observe the coating morphology, and the physical and electrochemical properties of the coatings with different mass fractions of GO-SiO2 are tested for corrosion resistance. The results show that 3 wt% GO-SiO2 coating shows the best performance, the coating hardness reaches H, the adhesion grade is II.