Does Aluminum Rust?

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Home > Articles > *Does Aluminum Rust?*
** Does Aluminum Rust? **

Aluminum corrodes but it does not rust. Rust refers only to iron and steel
corrosion.

Aluminum is actually very prone to corrosion. However, aluminum corrosion
is aluminum oxide, a very hard material that actually protects the aluminum
from further corrosion. Aluminum oxide corrosion also looks a lot more like
aluminum (dull gray to powdery white in color), so it isn't as easy to
notice as rusted iron.

When iron corrodes the color changes and it actually expands. This
expanding and color change can produce large red flakes that we all know as
rust. Unlike aluminum oxide, the expanding and flaking off of rust exposes
new metal to further rusting. This is why it is so important to provide a
barrier so rust doesn't start.

While aluminium doesn't rust, it often becomes dull from corrosion, and is
often encrusted with brake dust, calcium, lime, tarnish, grease, oil and
hard water stains. Simply washing it off


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does aluminum rust

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