Popular science: Will aluminum rust?

In the fact, aluminum also rusts. But when aluminum rusts, it does not keep rusting until the rust is finished like iron.  
It is rusting that metal is oxidized by oxygen in the air. Aluminum reacts with oxygen and becomes aluminum oxide, which is aluminum rust. It is very thin. The thickness is only one ten thousandth of a millimeter, but the rust is very hard and wear-resistant. It is close to the surface of the aluminum, so that the aluminum inside cannot reach the outside air, which prevents the aluminum from continuing to rust.

(Tips: The dense aluminum oxide film on the surface of aluminum stops the interior from reacting, so that aluminum is not easy to be oxidized. However, there are also “destroyers”: one is alkali and the other is acid. Chemical reaction occurs between aluminum and them. The resulting compounds is liable to fall off. Dishes often contain acid and alkali components, therefore, do not put the fruit wine in aluminum ware to avoid the corrosion and damage. In addition, do not wipe the rust stains for it is gray and embarrassing. Although you wipe a scale of aluminum oxide out, you can only be happy for a little while for a brighter pan. Without the protection of the film on its surface, the aluminum pan will continue to oxidize. Not only the gray color is still there, but the aluminum pan is getting thinner and thinner, which will shorten its service life.)