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Research on influencing factors of corrosive sulfur attacking copper in insulating oil and prevention
Author(s) -
Qian Yihua,
Su Wei
Publication year - 2013
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.21894
Subject(s) - sulfur , transformer oil , copper , benzotriazole , oxygen , corrosion , oil field , oil tank , flue gas desulfurization , chemistry , nitrogen , metallurgy , materials science , inorganic chemistry , transformer , chemical engineering , organic chemistry , voltage , petroleum engineering , engineering , electrical engineering
The influencing factors (temperature, electric field, and oxygen) of sulfur attack in transformer oil are studied through comparative tests on new oil, oil in service, and these two oils with the deactivator additive BTA (benzotriazole, C 6 H 4 N 3 H). The influence of these factors on the chemical reaction between copper and corrosive sulfur is analyzed in further. The results show that temperature, electric field, and oxygen can promote the reaction between copper and corrosive sulfur. Moreover, oxygen also accelerates the aging of the insulating oil. On the contrary, recharging nitrogen can remove oxygen and reduce sulfur's corrosive activity. Adding the BTA deactivator can also prevent corrosion, even during the accelerated aging of oil with oxygen. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.