Fundamentals of Corrosion and Corrosion Control for Residential Subsurface Transformers

The severe and varied environment of residential sub- surface transformers (RST) requires different materials and means of corrosion protection from the pole-top transformer. The galvanic characteristics of mild steel and stainless steels are presented along with corrosion test data on mild steel and ferritic stainless steels in RST environments. Also, field test data on corrosion and cathodic protection of transformers in typical RST installations are given.