[IN54NITY]

Hack, my ignorance shines through, thanks for the response and explanation. Do you know what the fastener materials are? I'll try finding it now with a search.

racey, you're right, I should have said coating instead of galvanizing, or anodized aluminum. I understand that Zn does have greater electronegativity than Fe (or do I have it backwards? college chem was a long time ago), but there is electro potential nonetheless and we're talking about a relatively long time in contact. I've seen aluminum and steel parts welded by this process that could not be broken with a sledge hammer.