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Chemistry
Elements and Compounds

Does aluminum rust?

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March 08, 2011 12:56AM

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.