[RE-wrenches] Incompatible Metals

[Hugh]

>Hi Kelly:
>     Are you sure about the XHHW listing.  Doesn't that designate 
>aluminum wire?  You mentioned CU before.
>     I have seen some discolloration from copper wire against module 
>frames, but not real corrosion.

The way I understand galvanic corrosion is that it is produced by a 
current as in a battery, and if the base metal side of the equation 
is large in area, and the noble metal is small then the effect is 
diluted.  If you use aluminium rivets in a copper vessel then they 
might disappear fast, but copper rivets will have little effect on an 
aluminum vessel.  So much for the theory anyway.
-- 
Hugh Piggott

Scoraig
http://www.scoraigwind.co.uk