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针对气体绝缘组合电器(gas insulated switchgear，GIS)内盆式绝缘子所用的环氧树脂材料，在纳秒脉冲条件下开展沿面闪络老化实验研究。设计不同气压值下沿面闪络新型实验装置，在SF6环境中进行环氧树脂纳秒脉冲沿面闪络特性研究，并对沿面闪络前后材料老化区域的表面形貌和元素组成进行测试，分析环氧树脂材料老化前后表面理化特性的变化规律。实验结果表明，随着SF6气体压强的增大，环氧树脂纳秒脉冲沿面闪络电压升高。闪络老化后环氧树脂表面氧化铝颗粒凸显出来，且随着老化进一步加深，表面聚合物与放电产生的含氟物质发生反应生成有机氟化物，反应产物被电弧溅射出去覆盖在材料表面。而氧化铝颗粒填料的性质在闪络老化过程中并未发生明显变化。以上针对环氧树脂绝缘材料所开展的实验研究可为GIS内环氧树脂绝缘材料改性，以及增强其耐压性能和抗老化性能提供指导。“,”Surface flashover and aging experiments driven by nanosecond pulses were conducted on epoxy resin (EP) materials which have been widely applied in gas insulated switchgears (GIS) for making disc insulators. A novel experimental setup for surface flashover experiments under different gas pressure was developed, and flashover characteristics of EP driven by nanosecond pulses were studied in SF6. Then the surface morphology and elemental composition of the material before and after aging treatment were measured, and the changes of physical and chemical properties of EP in the aging process were analyzed. The results show that, with the increment of SF6 pressure, the flashover voltage of EP increased. In the process of flashover aging, the alumina particles were gradually exposed on the EP surface. As the aging time increased, the organic fluoride, which was produced by the reaction between the polymer on the material surface and the fluorine-containing substances generated by discharge, was sputtered out by the electrical arc and subsequently covered on the material surface. However, there was no obvious change to the properties of alumina particle fillers in the aging process. This research is of significance to those seeking to modify the EP material appliedin GIS, and can also provide some reference to improve the insulating performance and the aging resistance of EP materials.