Marine Growth Prevention System / Antifouling System

What is Marine Growth?

Ships while sailing use seawater for several purposes. The seawater is used in the ship’s system and discharged after the use. However, seawater contains several marine organisms which enter the ship along with the seawater and deposit and flourish on the parts of the ship’s system. These macro and micro marine organisms such as sea worm, molluscs barnacles, algae, hard shells like acorn barnacles etc. These organisms stick to the surface of the ship and flourish over there, resulting in marine growth.

Effects of Marine Growth

As the marine organisms flourish they block and narrow the passage of cooling water in the ship’s system resulting in the following factors:

  • Impairing the heat transfer system
  • Overheating of several water-cooled machineries
  • Increase in the rate of corrosion and thinning of pipes
  • Reduced efficiency which can lead to loss of vessel speed and loss of time

Fighting Marine Growth

The system consists of a CONTROL UNIT which supplies impressed current to Anodes. The COPPER anode produces ions, which are carried away by the sea water into the piping and machinery system. Concentration of copper in the solution is less then 2 parts per billion but enough to prevent marine life from settling.

Basic principle on which MGPS runs is electrolysis. The process involves usage of Copper, Aluminum and Ferrous Anodes.

The anodes are normally fixed in pairs in the main Sea Chests (Click on thumbnail for larger preview)

The anodes can also be fitted in Sea Strainers (Click on thumbnail for larger preview)

and in Reactions Tanks where vessels do not have drydocking schedules like FPSO & FSO. (Click on thumbnail for larger preview)

The ions, spread over the system and produce a anti fouling and anti corrosive film over the Sea Water Pipelines , Intercoolers, Condensors, Heat Exchangers, Valves, Refrigeration Systems, Box Coolers and AC units internally. Increasing seawater circulation and eliminating corrosion in the pipelines, increasing its duration and efficiency. That means energy savings.

Box Cooler Anodes (Click on thumbnail for larger preview)