> My research indicates that these dissimilar metal reactions can *only*
take
> place in the presence of air & moisture (the electrolyte).
>
> One year old copper radial to aluminum plate connections, pre-treated with
> petroleum jelly, are still less than one DC ohm, still shiny. The excess
> coating has long since washed off, but it sure is hanging in well, inside
> the compressed bolted connections.
If I'm not mistaken, moisture must be present, but not air. A wet cell can
be overfilled with electrolyte and therefore have no air, but it will still
work just fine. Your use of petroleum jelly keeps out both air and water so
it works quite well.
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