Experimental study of the role played by dibenzyl disulfide on insulating oil corrosivity-effect of passivator irgamet 39

摘要

The presence of potentially corrosive sulfur species in insulating oil has caused a significant number of catastrophic failures, which have been reported over the last few years. However, the sources of corrosive sulfur in oil have not yet been completely identified. Corrosive sulfur species can be residuals of the refining process, but mainly they are formed under normal operating conditions. It has been shown that noncorrosive sulfur can become corrosive after being exposed to, for example, elevated temperature, electrical stress, and hot metal surfaces, producing metal sulfides [1], [2].