Aluminium does not rust. Aluminium reacts very quickly with the oxygen in the air. This results in a thin layer of aluminium oxide on the outside of the metal. Any further contact with oxygen on the inside of the aluminium part is made impossible. Thus, the metal will not be affected by corrosion. The oldest aluminium sea-going yacht – built in 1936 – is still very much afloat.
An aluminium hull is stiff and little affected by vibration. An aluminium hull behaves well in heavy swell and choppy seas.