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A Study on Ageing Characteristics of RTV Silicone Coating Materials by Corona Discharge  

한세원 (한국전기연구원)
한동희 (한국전기연구원)
조한구 (한국전기연구원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.52, no.8, 2003 , pp. 359-364 More about this Journal
Abstract
Ageing characteristics of RTV coating materials by corona discharge have been studied. The hydrophobicity recovery of RTV coating materials with 300${\mu}{\textrm}{m}$ thickness was identical with a bulk silicone materials. The RTV coating materials hydrophobicity has been almost lost when its were discharged during 40 seconds by corona discharge of 10㎸, and recovered after about 45 hours. The resistivity of RTV coating materials has not been recovered after 45 hours, though after 80 hours the initiation resistivity value has been recovered up to 95%. There was no critical change of compounds(such as Si and Al) on RTV surfaces by the corona discharge treatment until 100 seconds. In the test of arc erosion, it was seen that the coating sample with silicone rubber as a base material have more longer burn-out time than other samples with FRP or glass base.
Keywords
RTV silicone coating; corona discharge ageing; hydrophobic; arc erosion; tracking test;
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