Abstract
Performance of Power and Converter transformers has been severely affected by the presence of reactive and corrosive sulphur in transformer oil. It is reported that mitigation of the problem of corrosion of copper conductors due to presence of reactive/corrosive sulphur in transformer oil is possible by the use of metal passivator which forms a thin film on copper surface to prevent interaction of oil with copper. In service transformers have been saved and experience has shown that metal passivator is effective. However, data, on both qualitative and quantitative measure of the performance of transformer oil after addition of metal passivator is not available in literature. Hence an attempt is made to understand the role of metal passivators in preventing corrosion of copper conductors in transformers.
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