Article,

THE SURFACE CHEMICAL COMPOSITION OF CORONA CONDlTlONED SILICONE RUBBER INSULATORS

, and .
(2003)

Abstract

It has been found that streamer corona and to a lesser extent glow corona cause a temporary loss of hydrophobicity in room and higb temperature vulcanised silicone rubber insulators. Chemical analysis on the surface of samples has indicated that silicone compound is removed from the surface by corona but returns to the surface by diffusion once the corona activity has ceased. Should this removal and subsequent replenishment of silicone compound by corona continue for an extended period of time, the silicone rubber insulator will permanently lose its hydrophobic properties.

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