Zinc Hull Anodes

Coatings are the first barriers to protect vessel hulls against corrosion. Due to microscopic pinhole defects in the coating and damage to it whilst in service localised pitting will occur. Hull/flush mounted anodes are used to complement the coating at areas of exposed steel prolonging the life of the coating. Hull anodes are also employed to reduce corrosion rates on areas of the hull that are local to propellers and the propellers themselves. Magnesium alloy anodes are very active electrochemically, and they are usually recommended only for short exposes or temporary protection and in positions where replacement is easy in seawater. Magnesium alloy anodes are often used for hull protection of fresh water vessels i.e. narrow boats/barges.