缓蚀剂BTA对变压器热老化油硫腐蚀的影响

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Abstract To study the influence of corrosion inhibitor BTA on sulfur corrosion of transformer oil, a series of accelerated thermal aging tests was carried out by adding corrosive sulfur and BTA to new transformer oil in the laboratory. The surface state, microstructure and element components of copper winding and insulation paper were analyzed by macroscopic observation, scanning electron microscope (SEM) and energy-dispersive x-ray spectroscopy(EDX) analyzer. Meanwhile, the breakdown voltage, dielectric loss and volume resistivity of transformer oil after thermal aging tests were measured by insulating oil dielectric strength automatic tester and insulating oil dielectric loss/resistivity tester. Electrochemical analysis of copper windings was analyzed by three-electrode electrochemical system. The results show that the surface state of copper windings represents its corrosive level Adding BTA can inhibit oil sulfur corrosion, protect copper windings, and slow down the oil aging. BTA can not only act on both new copper winding and the corroded copper windings, but also increase the winding linear polarization resistance and decrease corrosion current.

Key words： Transformer oil-paper insulation copper winding dibenzyl disulfide inhibitor BTA thermal aging

Published: 03 March 2016

PACS:

TM835

Fund:国家自然科学基金（51277187）和国家创新研究群体基金（51021005）资助项目

Corresponding Authors: 周湶男,1973年生,博士,教授,主要从事电气设备在线监测与故障诊断、电力地理信息系统和绝缘材料老化等研究。E-mail: zhouquan@cqu.edu.cn

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	Zhou Quan
	Rao Junxing
	Chen Yao
	Pu Yayun
	Wang Shizheng
	Xie Huili

Cite this article:

Zhou Quan,Rao Junxing,Chen Yao等. The Influence of Corrosion Inhibitor BTA on Sulfur Attack of Transformer Oil[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 203-210.

URL:

https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I4/203

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