Study on Anti-pollution Flashover Durability of Superhydrophobic Insulating Coating Surface

The anti-pollution flashover performance of superhydrophobic coatings is one of the key factors that determine whether it can be further applied and promoted in the field of external insulation of power systems. However, there is a lack of theoretical and experimental research on the anti-pollution flashover durability of the superhydrophobic coating surface. This paper introduces the influence of corrosion on the anti-pollution flashover performance of the superhydrophobic coating surface, comprehensively analyzes the corrosion resistance mechanism of the coatings from both physical structure and chemical properties, and proposes a method to improve the anti-pollution flashover durability of the coatings. Furthermore, the anti-pollution flashover durability of the superhydrophobic coating surface was evaluated through experiments. The results show that the leakage current of the corroded superhydrophobic coating surface is still far less than that of the RTV coating and uncoated surface.