On 21/05/2013 13:32, Bob Hobden wrote:
"Baz" wrote
I read ages ago that dissimilar metals can cause an electric current.
(basics for a small charge). Elecrolite static charge? We can get corrosion
from this and during this process a polaric field can be obtained. It is
arguable that this is how life was formed with the aid of liquid water.



That's why you don't use Stainless Steel screws/bolts in Aluminium. The Ally
will just corrode away.

It depends. Large area of aluminium fastened by stainless steel is
usually considered safe. The other way round and you are asking for
trouble. Up the ante by introducing sea air and it is best to insulate
the joint.
--
Phil Cook