| Autor: |
N. A. Mehanna, A. M. Y. Jaber, Abdalla M. Abulkibash, G. A. Oweimreen |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Dielectrics and Electrical Insulation. 22:859-863 |
| ISSN: |
1070-9878 |
| DOI: |
10.1109/tdei.2015.7076785 |
| Popis: |
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°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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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