Silicon rubber being colonised by algae has been reported worldwide.But due to lack of a direct experimental standard

measurement of the species and amount of algae that colonise silicon rubber has rarely been reported.Because of factors such as the difference in algae species in different areas

no uniform understanding about the influence of algae on insulators has been reached.Consequently

we firstly got algae sample from the insulators covered with algae in substations of Sichuan province to test the algae through gene sequencing

and it was found to be green algae.Then it was cultivated in the lab and its cell number per m L was measured in a blood cell counting chamber.According to the method described in ASTM G29 and GB/T 24127

we immersed the SIR sample in the algae suspension and found that the suspension of 1×107algae cellsper m L could form a hydrophilic layer on the sample in 72 h

and its contact angle was lower than 30° when it was dried in natural environment.It is found that the green algae with numerical density of 4×104 cells/cm2 can suppress the ability of hydrophobicity transfer on Kaolin and randanite.The results help to understand the influence of the algae on the hydrophobicity property of silicon rubber

give a way of algae quantification in the experiment

and provide a reference for further studies.