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Message: <blockquote data-quote="Avalon" data-source="post: 56573" data-attributes="member: 5184">Aluminium doesn't corrode like for example steel does.When steel starts corroding (aka rusting), the corrosion eats up the steel slowly, until there's nothing left.Aluminium is very different, actually, it corrodes much faster than steel, but aluminium oxide (which is the aluminium's rust, if you want) is transparent, and doesn't eat it up. It forms like a shield around the aluminium core and actually works like a protection shield. It's the same for copper, except that copper oxide looks ugly green.Sweat does no harm to aluminium, so don't worry. Salty water and acids do harm it, as you can see on old aluminium alloy wheels on cars.</blockquote>