Marine gowth leads to the following problems: Serious biological corrosion to pipeline facilities Value of ser chest cannot close completely because of the overgrowing of the marine growth, which will lead to heavy safety problem. Cooling & circulating system and engines must be repaired or overhauled at rergular intervals with lots of time and money involved. Enormous financial resources and energy are inevitable for ships with no marine growth prevention system to remove marine growth at regularterminalson unscheduled. Fuel cost considerably increases as a result of low heat exchange rate caused by marine growth blocking seawater inlet, pipeline, filter and cooler. The merits of the device: The electrolyte can be obtained directly from seawater and is to be reduced into seawater finally. This solution has advantages such as little pollution, long electrode lifetime (universally 5years), unlimit for the electrode replacement even during the dock period, but regular maintenanceis needed to clean electrolyte such as magneslum hydroxide. Function: Directory electrolyze seawater to generate hypochlorite ion, which can efficiently kill the marine growth and ensure the flow inside the seawater pipeline. Application: Marine ships with different tonnage, ports and seawater power plants.