The main advantage of
aluminum boats compared to steel is that they are lighter in weight but have nearly the same strength and stiffness at the same thickness.
Aluminium boats are strong: these boats are used for yachts on long journeys, especially in polar seas. It is a non-ferrous metal, so it will not rust. Only its surface finish will be discolored due to its thin layer of gray aluminum oxide that protects it from corrosion.