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The industrial way is both coating and cathodic protection ( sacrificial anodes/aluminum).The coating greatly reduces the amperage needed from the anodes. In your case it would be so easy and cheap to drive several inch lengths of aluminum angle into the ground that I would put in several ( each one attached with a wire to the steel frame). For a limited ...


3

If it's not too late, I feel that a properly applied heavy duty corrosion resistant coating would be a more effective (and simpler) solution than cathodic protection. The movement of the unit during use would likely interrupt continuity at the joints, making bonding jumpers necessary. Just seems like a difficult way to tackle this problem...


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