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Bonding of Steel Suport Structures to Copper Ground Grid

Bonding of Steel Suport Structures to Copper Ground Grid

Bonding of Steel Suport Structures to Copper Ground Grid

(OP)
Hello members,
I had raised this question in electrical forum but was not lucky enough to get a solid answer.
In outdoor electrical substations the steel support structures (hot dipped galvanized) are bonded to the underground Copper ground grid (designed for safety & protection) using copper conductors. At some places where the soil is soft, these support structures are sitting on steel piles (screw piles) driven about 4-5m into the ground. To my knowledge this situation creates a corrosion cell where the two electrodes (copper & steel) are bonded together from outside using a wire and inside by the soil surrounding the copper grid and the steel pile.My question is, doesnot this arrangement corrode the steel support structure and subjected to a weight loss?

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