The focus on DBDS is not without reasons. They are:
• The degradation byproducts have been shown to be corrosive
• Many oils involved in recent failures due to corrosive sulfur have had high concentrations of DBDS
• Trending analysis of DBDS in highly loaded transformers shows a reduction of its concentration with
time
• Laboratory analysis of oils spiked with DBDS has shown that as DBDS concentrations decline the
corrosive nature of the oil increases, especially in sealed systems