Like other mitigation techniques, the removal of DBDS does not effect corrosion that has already taken
place. However, this process will destroy DBDS and benzyl mercaptan that is remaining in the oil. For
now, it is recommended that besides the process to remove the DBDS, clay treatment followed by the
addition of synthetic oxidation inhibitor to a concentration between 0.22 and 0.30% (by weight) be
incorporated into the process. In removing the DBDS, the oil might be less oxidatively stable and thus
the reason for the addition of an oxidation inhibitor. The reason for this is that most oils with DBDS are
not inhibited and therefore require some sort of stabilization for oxidation after the process of DBDS
destruction and thus the recommendation to add DBPC (BHT) or DBP. For sealed transformers this is
less of a concern.