Preparation and Properties of Nano Zirconia/Carbon Fiber Modified Epoxy Composite Coatings

Abstract

For improving the corrosion resistance of the epoxy coating in 3.5%NaCl solution and extending the service life of the metal， the ZrO2-Cnf was prepared by the hybridization of nano-ZrO2 and carbon fiber (Cnf) with silane coupling agent KH560.Moreover， the ZrO2/EP coatings and ZrO2-Cnf /EP coatings were prepared by spraying method by adding 1%， 2%， 3%and 4%(atomic fraction) of ZrO2 and ZrO2-Cnf fillers into epoxy (EP) coatings， respectively.The modified fillers and modified epoxy composite coatings were characterized by scanning electron microscopy， Fourier transform infrared spectroscopy， electrochemical tests， Vickers hardness tests and friction and wear tests.Results showed that modified fillers could completely improve the corrosion resistance of epoxy resin coatings.When the content of filler was 2%， the corrosion resistance of ZrO2/EP coating and ZrO2-Cnf /EP coating was the best， and the wear loss was the smallest.When the content of the two fillers was 3%， the maximum hardness values were 32.9 HV5.0 and 46.6 HV5.0， respectively.

Keywords

• coating|epoxy resin|nano zirconia|carbon fiber|electrochemical impedance spectroscopy (eis)