Exposure to air does it to all types of Aluminum.
Aluminum Oxide is so hard that it's used as sandpaper grit and very inert
to most chemical reactions.
That's probably one reason that people don't constantly get Aluminum
poisoning from, what...the third most common element on the planet??
ode
At 10:29 AM 6/11/2008 -0600, you wrote:
Ode Coyote wrote:
..... like Aluminum quickly makes itself an virtually impervious and
inert VERY hard Aluminum Oxide layer that prevents further oxidation for
thousands of years.
Under what circumstances does that happen? And to what types of aluminum?
thanks,
sol
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