[RE-wrenches] Incompatible Metals

[Joel Davidson]

Here is a good powerpoint presentation about galvanic corrosion.
www.rose-hulman.edu/~stienstr/me%20328/Day_36.ppt

----- Original Message ----- 
From: "Hugh" <hugh at scoraigwind.co.uk>
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Sent: Saturday, January 15, 2011 2:46 PM
Subject: Re: [RE-wrenches] Incompatible Metals


> >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
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