corrodes, but generally gets only a thin layer of corrosion and is then
pretty much inert (similar to silver which tend to tarnish rather than rot).
That's why it was often used to clad domes of buildings and such - Boston
still has tons of copper construction (Paul Revere was a copper magnate
don'tchaknow).
In other words there's a tarnish, but not "rust through" like you'd see with
steel. The tarnish is unsightly, but not really structurally dangerous in
any way.
So we always talking about corrosion, but some corrosion is worse than
others. ;^)
Jim Davis
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From: Ben Doom [mailto:[EMAIL PROTECTED]
Sent: Wednesday, May 19, 2004 4:50 PM
To: CF-Community
Subject: Re: Deck construction question
> But it really seems to matter why aluminum is an issue. If it's an
> integrity issue then you should definitely throw some padding. It might
> just be a cosmetic issue however - maybe the two metals will turn green if
> they come into contact for long periods. That's bad on the outside, but
> fine for your ledger.
When two differing types of metals are in contact, they tend to
chemically react, creating an electric charge and corroding both metals.
This is why knives should be stored in knife blocks, by the way. It's
also why the clamps on your battery terminals should be tight -- to seal
out air and prevent corrosion between the clamp and post.
Wow! I finally knew something useful!
--BenD
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