A multi-degree of freedom mechanistic-chemometrics model for predicting the pitting damage of HP-13Cr stainless steel is developed by combining the mechanistic models and chemometrics method. The mechanistic model is reconstructed by considering the effect of single factors, such as high temperature, high CO₂ pressure, flow rates and complex stress distribution. The single mechanistic models are combined together considering the weight coefficients of variable interaction using the chemometrics method. Finally, the predicted results are validated by six-year-served field data, which indicates that the newly developed mechanistic-chemometrics model is accurate and highly reliable.

结合力学模型和化学计量学方法，建立了预测HP-13Cr不锈钢点蚀损伤的多自由度力学化学计量学模型。考虑到高温，高CO ₂压力，流速和复杂应力分布等单一因素的影响，重建了机械模型。考虑到可变相互作用的权重系数，使用化学计量学方法将单个力学模型组合在一起。最后，通过六年的现场数据验证了预测结果，表明新开发的机械化学计量学模型是准确且高度可靠的。