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首页> 外文期刊>IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society >The Minimum Concentration of 1,2,3-benzotriazol to Suppress Sulfur Corrosion of Copper Windings by DBDS in Mineral Transformer Oils
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The Minimum Concentration of 1,2,3-benzotriazol to Suppress Sulfur Corrosion of Copper Windings by DBDS in Mineral Transformer Oils

机译：The Minimum Concentration of 1,2,3-benzotriazol to Suppress Sulfur Corrosion of Copper Windings by DBDS in Mineral Transformer Oils

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摘要

The incubation criterion of the 62535 standard procedure of the International Electrochemical Commission (IEC) was modified to obtain the depletion profiles for different concentrations of each of 1,2,3-benzotriazol (BTA) and dibenzyl disulfide (DBDS) when both are present in a mineral oil matrix. Measurements on BTA concentrations ranging from 0 to of 70 mg L-1 show that its depletion profile after incubation for 72 h, at room temperature, and at 150 degrees C in the presence and absence of a copper strip, is the same irrespective of the DBDS concentration. Similar measurements on DBDS at concentrations ranging from 10 to 300 mg L-1 show that identical depletion profiles are obtained as long as the BTA concentration is maintained in excess of 5 mg L-1. The results show that a minimum BTA concentration of 5 mg L-1 is needed to make the copper windings in contact with the mineral oil passive and in turn suppress their sulfur corrosion by DBDS.

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