In order to study the corrosion promotion activity of graphene,it is modified in insulation through loading nano SiO2 on its surface.The obtained silica/graphene materials are characterized by means of FT-IR,XPS,TEM and four-point probes,and are added into the waterborne epoxy resin to test the coating protection and physical properties.Work results reveal that embedding silica/graphene composites into anticorrosive coating greatly enhances its corrosion resistance and physical properties.Compared with pure waterborne epoxy resin coating,the coating embedded with silica/graphene has a decrease of 96.1％and 95.4％in oxygen transmission rate and water vapor transmission rate,respectively.Electrochemical measurement demonstrates that encapsulating graphene with nano SiO2 can shield its conductivity,thereby inhibiting its corrosion promotion activity.
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