The development of a mechanistic-chemometrics model with multi-degree of freedom for pitting corrosion of HP-13Cr stainless steel under extremely oilfield environments. (1st April 2021)

• Record Type: Journal Article
• Authors: Zhao, Yang; Hua, Yong; Liu, Bin; Li, Xuanpeng; Xie, Junfeng; Zeng, Guanxin; Zhang, Tao; Wang, Fuhui
• Is Part Of: Corrosion science. Volume 181(2021)
• Publication Date: 2021-04-01
• Subjects: A. Stainless steel -- B. Modeling studies -- B. Polarization -- C. Pitting corrosion; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109237
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: A multi degree of mechanistic-chemometrics model for predicting pitting of HP-13Cr stainless steel is developed. The prediction model is reconstructed by considering the influence of single factors and their interaction. The weight coefficients of single factors and their interaction effects were determined by factorial design method. The prediction results are consistent with the six-year-served field data of HP-13Cr SS along the well. Abstract: 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.