Will the aluminum alloy rust?

Aluminum alloy will rust, but it has a good anti-corrosion effect.

Rust, in fact, is mostly metal oxidized by oxygen in the wet air. Oxygen is the most trouble some thing for iron. After the iron rust, because the rust is loose, oxygen can take advantage of the gap attack. Aluminum is not, aluminum can easily be with oxygenation synthetic aluminum rust - aluminum trioxide, or simply alumina for short. This layer of alumina is tightly attached to the surface of the aluminum, preventing the aluminum in the inside from being combined with oxygen.

Because aluminum alloy is also a metal material, so it will rust, but aluminum alumina after oxidation to produce a dense layer of alumina "protection film", can prevent further oxidation of aluminum, its corrosion resistance is mainly due to the surface of the oxide film coating isolated itself and the outside air, water vapor contact, Avoid chemical reactions between each other to prevent corrosion.

The rust it contains clings to its surface, preventing oxygen from getting into the interior of the aluminum, which no longer rusts, and this layer of rust becomes a protective film of the properties of aluminum products, which we call alumina. Alumina has a characteristic that wipes it off and will soon produce a new layer of alumina that continues to act as a protective feature.