| Cured EP has a high crosslinking density, high friction coefficient(COF) and poor wear resistance. It is an important to prepare an anticorrosion and wear resistance EP coating. Epoxy value is an important impact on the performance of EP coating. First, in this paper, we prepared three common EP coating with different epoxy value, and then researched their anticorrosion and wear resistance performance. Then, we optimized one of the EP coating with superior anticorrosion and added graphene(G) and graphene oxide(GO) to improve its tribological and anticorrosion performance further and analyzed and discussed the different improvement mechanism of G and GO in EP coating. Finally, in the research, we found that GO not only can improve the anticorrosion and wear resistance of EP coating efficiently, but also has an excellent interfacial structure with EP and inorganic fillers. As a result, GO can be used to improve the interfacial structure and achieve excellent anticorrosion and wear resistance of inorganic-EP composites.In order to research the mechanism of anticorrosion and wear resistance of EP and its composite coatings, flourier transform infrared spectrometer(FT-IR) was used to detect the different organic groups of EP before and after cured. X-ray photoelectron spectrometer(XPS) was used to research the composition, chemical valence and valence band structure of the element in the coatings. Scanning electron microscope(SEM) was used to detect the cross-section topographies of the coatings, the dispersion of fillers in the coating, the interfacial structure of between fillers and EP, and the wear trace topographies of the coatings. Electrochemical workstation was used to research the anticorrosion performance of the coatings. UMT-3 tribology tester was used to test the COFs and surface profiler was used to characterize the wear rate of the coatings. The results are as follows:(1) With the increasing of epoxy value, the anticorrosion performance of EP coating improved,the COF and wear rate of EP coating increased.(2) G and GO can improve the anticorrosion and wear resistance of EP coating efficiently. Gcan improve the anticorrosion performance of EP coating further comparing to GO, andGO can improve the wear resistance of EP coating further comparing to G. The interfacialstructure between GO and EP is better than that between G and EP. A excessive fillercontent will cause the agglomeration of fillers and some defect in the coating, then theperformance of the EP coating reduced.(3) GO can improve the interfacial structure of Si C and EP inefficiently, and then improve theanticorrosion and wear resistance of EP coating. |
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