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Yes, but not red rust like iron, or bluegreen "rust" like copper. Aluminum oxidizes ("rusts") extremely fast on all surfaces exposed to air, and that oxidation is almost the same color of the aluminum, but just a hair on the pink side for a week or so.

Aluminum's hard oxidation actually protects the aluminum. In fact, if you scratched a spot in the protective oxidation, the scratch would re-oxidize in a matter of seconds.

When you weld aluminum, you must use a process that eliminates the oxidation, otherwise the welding will simply melt the aluminum.

To paint aluminum, you must use a primer that cuts chemically through the oxidation, or it will not stick.

Answer:No. However, it does corrode. Corrosion often results from salts and contaminants which leach into the aluminum (oxide) surface. Anodizing is a way of putting an artificial oxide coating on the aluminum. This coating is then often dyed and sealed to protect it. Protected aluminum is pretty good stuff and doesn't corrode if given a little bit of care. Natural aluminum also develops the same sort of coating (which is clear so it is hard to see), but it is more porous and fragile compared to anodized coatings.A
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