Research on Interface Modification and Thermal Insulation/Anticorrosive Properties of Vacuum Ceramic Bead Coating

The thermal insulation effect of the coating was closely related to content filler, but too much filler would cause interfacial compatibility problems various substances in coating, micro-defects and affect anti–corrosion performance coating. Therefore, solving interface problem key preparing a with heat anticorrosion functions. In this study, organic–inorganic hybrid polymer used modify surface vacuum ceramic microbeads, epoxy–silicone resin as film–forming material prepare heat-insulating anticorrosive that can withstand 200 °C. SEM morphology showed beads modified by agent film-forming were improved, dispersibility significantly tightly arranged; conductivity reached 0.1587 W/(m·K), which decreased 50% after adding 20% beads, ANSYS finite element simulation has good performance; underwent aging test at °C for 600 h, microstructure dense, low-frequency impedance modulus still around 109 Ω·cm2. There no obvious defect alternating cold h; above 108 Ω·cm2, 1010 Ω·cm2 130d immersion test, indicating had resistance anti-corrosion performance.