reduce the risk of transporting organisms from other parts of the world to non-native areas. Although most ships do ballast water management not all are able to clear the tanks. In an emergency, when the crew can clean out residual organisms, they use sodium chloride (salt) brine to treat the ballast tanks. Vessels arriving in the Great Lakes, and North Sea ports, were exposed to high concentrations of sodium chloride until the mortality rate of 100% is reached. Results show that an exposure of 115% of brine is extremely effective treatment resulting in a 99.9 mortality rate of living organisms in ballast tanks regardless of the type of organism. There was a median of 0%. About 0.00–5.33 of organisms are expect to survive treatment of the sodium chloride. The Ballast Water Management Convention, adopted by the International Maritime Organization (IMO) on 13 February 2004, aims to prevent the spread of harmful aquatic organisms from one region to another, by establishing standards and procedures for the management and control of ships' ballast water and sediments. This entered into force worldwide on 8 September 2017. Under the convention, all ships in international traffic are required to manage their ballast water and sediments to a certain standard, according to a ship-specific ballast water management plan. All ships will also have to carry a ballast water record book and an international ballast water management certificate. The ballast water management standards will be phased in over a period of time. As an intermediate solution, ships should exchange ballast water mid-ocean. However, eventually most ships will need to install an on-board ballast water treatment system. A number of guidelines have been developed to help implement the convention. The convention will require all ships to implement a Ballast Water and Sediments Management Plan. All ships will have to carry a Ballast Water Record Book and will be required to carry out ballast water management procedures to a given standard. Existing ships will be required to do the same, but after a phase-in period. One of the most common problems in vessel maintenance is the corrosion that takes place in the double hull space ballast tanks occupy in merchant vessels. Bio-degradation of ballast tank coatings takes place in marine environments. Ballast tanks usually carry bacteria and other organisms, some of which can damage the ballast tank coating and structure. Micro-cracks and small holes have been found in ballast