Title :
Effect of acid immersion on RTV silicone rubber coatings in inclined plane tests
Author :
Jahromi, All Naderian ; El-Hag, Ayman H. ; Jayaram, Shesha H. ; Cherney, Edward A. ; Sanaye-Pasand, Majid ; Mohseni, Hosein
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
The paper presents the results of an investigation into the effect of acid immersion on the aging of room temperature vulcanized (RTV) silicone rubber coatings in inclined plane tests (IPT). Two commercial coatings, RTV-A filled with ATH (aluminum tri-hydrate) and RTV-B filled with silica, are compared before and after acid immersion. Acid aging consists of immersing the samples in 3.9 pH nitric acid at a temperature of 90°C for 2 weeks. The relative comparison between the two samples is based on the development of the fundamental and third harmonic of the leakage current during IPT tests, eroded area, the time to failure and SEM microphotographs. All of these observations show that acid rain damages RTV-A more severely than RTV-B. However virgin ATH filled sample showed a better performance compared to the silica filled material.
Keywords :
ageing; air pollution; environmental degradation; filled polymers; insulation testing; leakage currents; microphotography; scanning electron microscopy; silicone rubber; vulcanisation; 2 weeks; 90 C; SEM microphotographs; acid aging; acid immersion; aluminum tri-hydrate; commercial coatings; inclined plane tests; leakage current; pH nitric acid; room temperature vulcanized silicone rubber coatings; silica filled material; Aging; Coatings; Insulation life; Insulator testing; Leakage current; Polymers; Rain; Rubber; Silicon compounds; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2005. CEIDP '05. 2005 Annual Report Conference on
Print_ISBN :
0-7803-9257-4
DOI :
10.1109/CEIDP.2005.1560684
