In order to investigate the effect of acid and antioxidant 2, 6-di-tert-butyl-p-cresol (DBPC) on the sulfur corrosion in oil, antioxidant DBPC and two kinds of acid were added into transformer oil which contains corrosive sulfur DBDS.Then the oil-paper insulation was experienced accelerated thermal aging under N2 environment.After the aging experiment, the copper winding was unfolded and the corrosion depositions on the copper and paper surface were observed.The GC-MS was used to measure the residual DBDS concentration in the oil.The activation energy of the corrosion reaction between DBDS and copper winding under the effect of acid was calculated using the Arrhenius equation.The results show that the corrosion degree of the copper conductor surface will be accelerated by acid; DBPC can mitigate the corrosion on copper surface to a certain extent; and Cu2S deposition can be hardly formed on the paper surface under N2 condition.In addition, the activation energy of the reaction between DBDS and copper winding is about 88.37 kJ/mol using the Arrhenius equation, whereas with the effect of the acid the activation energy decreased by almost 30.64%.The corrosion reaction between DBDS and copper winding will be easier to conduct under the effect of acid.
廖瑞金,胡恩德,杨丽君,黄加佳. 变压器油中酸与抗氧化剂协同作用对油硫腐蚀的影响[J]. 电工技术学报, 2016, 31(11): 204-210.
Liao Ruijin Hu Ende Yang Lijun Huang Jiajia. The Effect of Acid and DBPC on the Sulfur Corrosion Mechanism in Power Transformer. Transactions of China Electrotechnical Society, 2016, 31(11): 204-210.
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2016, Vol. 31 
