DocumentCode :
3071771
Title :
On the role of water in the ageing of polymers in air-insulated electrical systems
Author :
Goldman, A. ; Goldman, M. ; Sigmond, R.S. ; Sigmond, T.
Author_Institution :
Lab. de Phys. des Decharges, CNRS, Gif-sur-Yvette, France
fYear :
1990
fDate :
10-14 Sep 1990
Firstpage :
500
Lastpage :
504
Abstract :
Experimental results are presented on the direct interaction between corona and insulating surfaces, including the generation of water by corona oxidation of the polymer. Measurements of indirect corona-polymer interaction by corona exposure of distilled water with submerged polymer samples are also reported. It is shown that corona discharges in ambient air will form a water layer on any exposed polymer surface, both by bringing water to the surface made hydrophilic by the corona, and by producing water from the polymer itself, by oxidation. Water exposed to air corona becomes acid and oxidizing, and causes marked aging effects on polymer surfaces. Thus, any model of the action of air corona discharges on polymer surfaces must include the presence and effects of an intermediary aqueous electrolyte surface layer
Keywords :
ageing; air; corona; electric breakdown of gases; gaseous insulation; oxidation; polymers; water; ageing; air-insulated electrical systems; ambient air; corona discharges; corona oxidation; distilled water; insulating surfaces; intermediary aqueous electrolyte surface layer; polymers; submerged polymer samples; water layer; Aging; Corona; Dielectrics and electrical insulation; Oxidation; Paper technology; Physics; Polymers; Surface discharges; Surface treatment; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
Type :
conf
DOI :
10.1109/ICDL.1990.202953
Filename :
202953
Link To Document :
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