In this study (Part II), the empirical formulation of corrosion model of a ship’s ballast tank was developed to predict nonlinear time-dependent corrosion wastage based on the advanced data processing technique proposed by Part I. The detail on how to propose generalised mathematical formulation of corrosion model was precisely documented in the previous paper (Part I). The statistical scatter of corrosion data at any exposure time was investigated by the refined method and formulated based on a 2-parameter Weibull distribution which selected the best fit PDF. Throughout the nine (9) steps, empirical formulation of the ship’s seawater ballast tank was successfully proposed and four (4) key step results were also obtained. The proposed method in Part I was verified and confirmed by this application of seawater ballast tank, thus making it possible to predict accurate behaviours of nonlinear time-dependent corrosion. Developed procedures and obtained corrosion damage model for ship’s seawater ballast tank can be used for development of engineering software.

在本研究（第二部分）中，基于第一部分提出的高级数据处理技术，开发了一种船舶压载舱腐蚀模型的经验公式来预测非线性随时间变化的腐蚀损耗。有关如何提出广义数学公式的详细信息腐蚀模型的精确描述已在先前的论文（第一部分）中进行了详细记录。通过改进的方法研究了在任何暴露时间下腐蚀数据的统计散布，并基于选择最佳拟合PDF的2参数Weibull分布进行了公式化。在整个九（9）个步骤中，成功提出了船舶海水压载舱的经验公式，并且还获得了四（4）个关键步骤的结果。第一部分中提出的方法已通过海水压载舱的应用得到验证和确认，因此，可以预测非线性随时间变化的腐蚀的准确行为。所开发的程序和获得的船舶海水压载舱腐蚀损伤模型可用于工程软件的开发。