A study on the effect of environmental stresses on the hydrophobic characteristics and field performance of RTV silicone rubber coatings

Author

Hernandez, Rarniro ; Moreno, Victor M. ; Ponce, Marco A. ; Valle, Esteban ; Jimenez, Diana

Author_Institution

Inst. de Investigaciones Electr., Morelos, Mexico

Volume

2

fYear

1999

fDate

1999

Firstpage

735

Abstract

This paper presents the results of a study on the hydrophobic characteristics of Room Temperature Vulcanizing (RTV) silicone rubber coatings exposed to accelerated weathering in several degrading environments. Accelerated climatic stresses (UV light, rain), thermal treatment, ozone atmospheres and chemical oxidation were used to simulate aging. The dynamic behavior of the hydrophobicity recovery on both corona-treated and artificially polluted RTV coating surfaces was studied. The flashover performance of coated cap-and-pin insulators was evaluated after exposure of the coating to a chemically oxidizing environment. The physical changes occurring on the coating surface as a consequence of aging and its effect on the property of hydrophobicity recovery and on the electrical performance of coated ceramic insulators are analyzed and discussed

Keywords

corona; environmental degradation; flashover; insulating coatings; insulator testing; life testing; oxidation; silicone rubber insulators; 20 C; RTV silicone rubber coatings; UV light; accelerated climatic stresses; accelerated weathering; artificially polluted RTV coating surfaces; chemical oxidation; chemically oxidizing environment; coated cap-and-pin insulators; coated ceramic insulators; corona-treated RTV coating surfaces; degrading environments; environmental stresses; field performance; flashover performance; hydrophobic characteristics; ozone atmosphere; rain; room temperature vulcanizing silicone rubber coatings; thermal treatment; Accelerated aging; Acceleration; Chemicals; Coatings; Rain; Rubber; Surface contamination; Temperature; Thermal degradation; Thermal stresses;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on

Conference_Location

Austin, TX

Print_ISBN

0-7803-5414-1

Type

conf

DOI

10.1109/CEIDP.1999.807910

Filename

807910