Artificial testing and evaluation of RTV coatings in a salt-fog chamber

Author

Kim, S.H. ; Cherney, E.A. ; Hackam, R.

Author_Institution

Dept. of Electr. Eng., Windsor Univ., Ont., Canada

Volume

26

Issue

4

fYear

1991

fDate

8/1/1991 12:00:00 AM

Firstpage

797

Lastpage

805

Abstract

The electrical performance of room-temperature vulcanizing (RTV) silicone rubber insulator coatings under accelerated aging in a salt-fog chamber is reported. The RTV coatings were evaluated in fog produced from saline water at 900 μS/cm conductivity. The effect of the contaminants deposited during dry band arcing was evaluated with respect to the performance of RTV coatings. The increase of the leakage current and the corresponding decrease of the contact angle on the surface of the coating are shown to be related to contaminants on the RTV-coated surfaces. Five cleaning methods to remove the contaminants from the coated surface are examined, using leakage current and contact angle measurement as indicators of their comparative effectiveness

Keywords

insulation testing; rubber; silicones; accelerated aging; contact angle; contaminants; dry band arcing; electrical performance; leakage current; room temperature vulcanising coatings; salt-fog chamber; silicone rubber insulator coatings; Accelerated aging; Arc discharges; Cleaning; Coatings; Conductivity; Dielectrics and electrical insulation; Leakage current; Rubber; Surface contamination; Testing;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.83705

Filename

83705