Preparation of Fe₂O₃-HNTs hybrid Material and Its Effect on Properties of Epoxy Resin Coating

Through chemical precipitation method, nano ferric oxide particles (Fe₂O₃) were evenly coated on the surface of halloysite nanotubes (HNTs) to prepare Fe₂O₃-HNTs hybrid material. And the coating effects were analyzed with X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). Then the Fe₂O₃-HNTs hybrid material was further modified with silane coupling agent KH560. And the Fe₂O₃-HNTs/EP composite coating was prepared by mixing the modified Fe₂O₃-HNTs hybrid material and epoxy resin. Friction-wear experiment and electrochemical impedance spectroscopy (EIS) testing were carried out respectively to evaluate the wear resistance and corrosion resistance of the composite coating. The results show that the wear resistance, toughness and corrosion resistance of the Fe₂O₃-HNTs/EP composite coating were improved significantly compared with the pure epoxy coating.