为了考察石墨烯的腐蚀促进活性，在石墨烯表面负载纳米二氧化硅对石墨烯进行绝缘改性，通过FT-IR、XPS、TEM和四探针表征手段对二氧化硅/石墨烯复合材料进行表征。将二氧化硅/石墨烯复合材料添加到水性环氧树脂中测试其涂层防护性能和物理性能。结果表明，加入二氧化硅/石墨烯复合填料能提高水性环氧树脂涂层的防腐性能和物理性能；与纯环氧树脂涂层相比，二氧化硅/石墨烯复合材料水性防腐涂层的氧气透过率（OTR）和水蒸气透过率（WVTR）分别降低了96.1%和95.4%；电化学测试表明石墨烯表面沉积二氧化硅可以屏蔽掉石墨烯的导电性，从而抑制其腐蚀促进活性。

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.