The latest number of the IEEE Transactions on Dielectrics and Electrical Insulation (vol. 19 No. 5 October 2012), the prestigious IEEE publication, published the study by Sea Marconi in collaboration with the University of Missouri Rolla.Our work clarifies and makes the point about methods of quantification of sulfur compounds in used and unused oils. The title of our article is “IEC 62697-2012: State of the art methods for quantification of DBDS and other corrosive sulfur compounds in unused and used insulating liquids” and other corrosive sulfur compounds in unused and used insulating liquids” di Tumiatti, V. Roggero, C. ; Tumiatti, M. ; Di Carlo, S. ; Maina, R. per la Sea Marconi e Kapila, S. dell’università del Missouri, Rolla.
Studies of Sea Marconi appear once again pioneering regarding the assessment and determination of corrosive contaminants in insulating oils. In particular, the article describes the State of the art concerning the methods developed by the IEC TC10 WG37 for quantitative determination of highly corrosive sulfur compounds such as the DBDS and other sulfur compounds in used and unused insulating liquids. The methods described allow an objective approach to corrosiveness assessment of insulating liquids rather than subjective assessment based on the color evaluation of color of the current test methods standardized for sulphur potentially corrosive in insulating liquids. In addition, quantification of total corrosive sulfur (TCS) in insulating liquids permits an objective ranking of sulfur compounds according to their corrosivity towards copper.
