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. Aluminium alloy anodes are now mostly preferred due to their higher electrochemical efficiency which enables them to operate at different temperature co-efficient. The anodes are less dense than zinc making them lighter and easier for handling when fitting.