The surface morphology of the ballast tank has changed due to years of exposure to seawater corrosion. Hence, the severity of pitting corrosion and the random shapes of corrosion pits may affect the remaining life of the ballast tank. Therefore, this paper presents the difference in surface morphologies of corroded ballast tank and its correlation to the geometry of corrosion pits. These morphologies are related to the corrosion pit depth, which is obtained with a 3D laser scan. Furthermore, pit depth distributions are analyzed with some statistical parameters at different volumetric changes. As a result, the difference in pitting severity on several volumetric changes is associated with the corrosion pit geometry. The larger volumetric changes, the lower pitting severity, and thus the corrosion pits become a less sharp form or shallower corrosion pits.

压载舱的表面形态由于多年暴露于海水腐蚀而发生了变化。因此，点蚀的严重程度和腐蚀点的随机形状可能会影响压载舱的剩余寿命。因此，本文提出了腐蚀的压载舱的表面形态的差异及其与腐蚀坑的几何形状的关系。这些形态与通过3D激光扫描获得的腐蚀坑深度有关。此外，利用不同体积变化下的一些统计参数来分析坑深分布。结果，在几个体积变化上的点蚀严重性的差异与腐蚀点的几何形状有关。体积变化越大，点蚀严重性越低，