Preparation and Properties of Graded SiO2/EP Wear-resistant Composite Coating postprint

Abstract: To improve the over sedimentation of fillers, the poor adhesive strength and wear resistance of ceramic/epoxy (EP) composite coating, SiO2 powder with particle size of 5~50 μm was sprayed on the surface of liquid epoxy coating to let the particles settling naturally in the coating. The graded SiO2/EP composite coating was prepared by controlling the curing temperature and time and thereby the sedimentation depth of the SiO2 particles of different sizes. It follows that the adhesive strength and wear resistance of the SiO2/EP composite coating prepared by the new process is higher than that prepared by the traditional blending method.