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9th World Congress on Spectroscopy & Analytical Techniques

Paris, France

Nemer Muhanna

Nemer Muhanna

King Fahd University of Petroleum and Minerals, Saudi Arabia

Title: The minimum concentration of 1,2,3-benzotriazole to suppress sulfur corrosion of copper windings by DBDS in mineral transformer oils


Biography: Nemer Muhanna


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 shows 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 shows 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 to suppress their sulfur corrosion by DBDS.