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Old 03-26-2012, 03:05 PM
marxist marxist is offline
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Join Date: Aug 2007
Posts: 181
Hi Bizzy,

if I remember correctly some Physics classes from a while ago, then "blank" aluminum does not exist in nature because an aluminum surface instantly oxidizes, when exposed to oxygen (in nature primarily from air or water).
This oxidized top layer is non-conductive and consequently aluminum plates are automatically insulated.
The controlled technical application of this process is called
Anodizing - Wikipedia, the free encyclopedia.

Last edited by marxist; 03-26-2012 at 03:09 PM.
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