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Old 10-08-2013, 04:08 AM   #198 (permalink)
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Originally Posted by Allch Chcar View Post
Yes, bare aluminum is like mild steel. It's very prone to corrosion. Which is why aluminum is always coated with something like zinc to prevent corrosion.
Say what? Steel might be, Aluminum alloys aren't.

Aluminum in the presence of Oxygen very quickly forms an oxidized layer on the surface. That oxididized layer is stable and is what protects the rest of the Aluminum from further corrosion. The layer may be made thicker and harder using an anodising process. That type of layer is resistant to the mild acid that is ethanol.
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