Polymer superhydrophobic coating is one of the effective strategies to solve the icing problem of transmission lines icing and insulator wet flashover; however

it is difficult for the low hydrophobicity of pure polymer to meet the needs of transmission lines anti-icing and insulator anti-wet flashover. Therefore

amorphous silica was formed by co-hydrolysis of tetraethyl silicate

and fluorinated silica (SiO2@F) was successfully anchored on the surface of the substrate to prepare a superhydrophobic coating with high insulation performance. Under optimal loading conditions

the coating exhibits excellent superhydrophobic properties

with a contact angle of 165.1°

and a sliding angle of 0.3°. After undergoing UV radiation

salt spray corrosion

rainwater erosion

sandpaper abrasion

and ultra-low temperature testing

the coating still maintains excellent superhydrophobicity. Additionally

the wet flashover strength of the coating is 74.26% higher than that of room-temperature vulcanized silicone rubber (RTV) coating

which improves the insulation performance of insulators. Finally

the superhydrophobic properties of the polymer coating were verified on different substrates

proving the universality of the polymer coating. In summary

the superhydrophobic coating studied in this paper provides new insights for the design of new materials for anti-icing applications in power transmission lines.