Comparative Analysis of Measures to Reduce Wear on Ship Hull Structures in Areas Around Ballast System Suction Pipes

During the operation of a ship, it is necessary to take in and discharge ballast water. This is carried out with the help of the ship's ballast system. When the system is in operation, ulcers form in the areas beneath the suction pipes. This phenomenon is due to cavitation erosion, which is common in this type of system. The article examines measures to increase the wear resistance of the ship hull structure, most often the bottom plating of the ship hull in these areas. Criteria for evaluating two types of measures with the same purpose are proposed. It has been proven that by installing additional wear-resistant plates beneath the suction pipes of the ballast system, the wear problem is eliminated. On one hand, this measure helps reduce the time needed for hull repairs during docking and class repairs. On the other hand, it saves a significant amount of money for the shipowner, as additional activities related to providing repair conditions are not necessary.