Re: Negative Terminal Clamp Corrosion
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I'd hazard a guess & say it would be caused by the two dissimilar metals being the lead battery post & the battery terminal, which obviously isn't lead, being in contact with an electrolyte, (even water can be a weak electrolyte).
There's probably some form of leakage of gas, or even the battery acid, between the seal of the battery casing & the battery post.
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