Gus:

All metals have different chemical properties.  Putting any 2 (non-noble;
i.e., gold, platinum) metals together creates a very small galvanic charge
that eventually will corrode one or both metals.  In the case of aluminum,
if you want to make it non-reactive, you can have the aluminum "passivated"
.  See http://en.wikipedia.org/wiki/Passivation  I have used this process
many times to prevent aluminum corrosion.

It is not cheap so it depends on your application.  

Rich 

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
AGSCalabrese
Sent: Monday, June 15, 2009 6:56 PM
To: Microcontroller discussion list - Public.
Subject: [Tech] Will a Aluminium and Brass junction corrode in the presence
of water ?

I am trying to learn what metals will be safe when mated with aluminium.

Gus
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