To resist corrosion from sweat, aluminium may be used as a resistant alloy such as hydronalium.

First of all, the hulls, made of hydronalium (aluminium alloy), had limited durability, especially when sailing at high speed on a rough sea, resulting in cracks.

The Hydronalium alloys originated in Germany in the 1930s and are best known, at least by that name, in Eastern Europe.