Adhesion of Rime and Glaze on Conductors Protected by Various Materials

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Abstract
A layer of about 2 cm of either glaze or rime was accumulated on a stranded aluminum conductor covered by various non-conducting substances. This ice accretion was formed by exposing the conductor to an air stream containing supercooled water droplets at an ambient temperature of –12°C in an open 23 x 23-cm wind tunnel. The maximum air speed was 20 m/s. The adhesion measurements were made on a 5-cm sample cut in the center of the ice accretion. Results show that of the eleven substances tested, three (3) were found to have low adhesion. Taking into account other considerations such as the durability of the protective layer and the possibility of auto-release of the ice accretion, silicone rubber appears to be the most promising material amongst those tested.

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