Ships while sailing use seawater for several purposes, One primarily function seawater serves is to cool the engine and parts of the ship while it’s operating. However, As the seawater passes through the various pipes and parts of the ship’s engine, marine organisms could deposite along their surface
The main fouling organisms (macrofouling) can be inhibited from growing by dosing small quantities of copper into the water. The ionic products formed by the copper anodes are hostile to marine fouling and is carried by the flow of water to settle on surfaces where marine fouling is most likely to adhere.
The copper anodes are generally installed in combination with aluminium anodes. The transport of the copper ions is assisted by aluminium hydroxide created by the aluminium anodes which flocculates with the released copper ions. Aluminum hydroxide colloid formed could provide an anti corrosive film over the sea water piping system.