Is special coating for the ballast tanks necessary?
No special coating is required for the ballast tanks.
The Bawat BWMS using the in-voyage circulation mode, an additional deoxygenation process, also known as oxygen stripping, is included in the process. A small amount of nitrogen is injected into the water flow. In fact, a benefit of the deoxygenation is a significant reduction of ballast water tank corrosion.