Ships use seawater for several purposes, and one of the primary functions is cooling the engine and parts of the ship while while sailing. However, as the seawater passes through the various pipes and parts to cool the ship’s engine, marine organisms could deposite along their surface. Biological marine fouling (biofouling) happens when intrusive marine species settle on hulls, box coolers, seawater intakes and other submerged metal parts. These intrusive species can vary from plants, algae or other animals. With the correct temperature, pH, nutrients and flowrates, fouling takes place extremely fast. This in turn, will create bigger problems like blocked pipes, overheating, slower flowrates, accelerated corrosion and much more.
To protect and purify the surface of ship’s seawater pipework and mechanical parts, electrolytic antifouling is regarded as the most easy and economical method achieving marine biofouling protection. The marine growth prevention system (MGPS) system consists of a power control unit, a copper anode and a anti-corrosion anode. Depending on material in the sea water pipes, the anti-corrosion anode should be either aluminium or iron. In general, iron-based anode are used in conjunction with copper anode to mitigate corrosion in non-ferrous sea water systems, e.g. copper-nickel, aluminium-brass and nickel-aluminium-bronze alloys. The ionic products formed by the copper anode 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. Low concentration iron ions by released by iron anode is intended to repair and maintain the piping oxide films. When anti-corrosion anode installed, the corrosion rates are significantly reduced, extending the life of pipes and any other equipment that is connected to the seawater system.
Our anti-corrosion anodes are available for various kinds of vessels and boats including luxury yachts and pleasure craft. They have been installed on sea chest, strainer, treatment tank, box cooler, etc. The size (diameter and length) of the anodes is determined based on seawater velocity (inlet water debit), design life and consideration of the maintenance or dry docking schedule for the vessels. Standard sizes range from 50mm to 150mm in diameter and 100mm to 2,000mm length.