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|Title:||Phase-field model of pitting corrosion kinetics in metallic materials||Authors:||Ansari TQ
|Issue Date:||2018||Publisher:||Nature Publishing Group Published in partnership with the Shanghai Institute of Ceramics of the Chinese Academy of Sciences||Source:||NPJ computational materials, 2018, v. 4, no. 1, 38, p. 1-9 How to cite?||Journal:||NPJ computational materials||Abstract:||Pitting corrosion is one of the most destructive forms of corrosion that can lead to catastrophic failure of structures. This study presents a thermodynamically consistent phase field model for the quantitative prediction of the pitting corrosion kinetics in metallic materials. An order parameter is introduced to represent the local physical state of the metal within a metal-electrolyte system. The free energy of the system is described in terms of its metal ion concentration and the order parameter. Both the ion transport in the electrolyte and the electrochemical reactions at the electrolyte/metal interface are explicitly taken into consideration. The temporal evolution of ion concentration profile and the order parameter field is driven by the reduction in the total free energy of the system and is obtained by numerically solving the governing equations. A calibration study is performed to couple the kinetic interface parameter with the corrosion current density to obtain a direct relationship between overpotential and the kinetic interface parameter. The phase field model is validated against the experimental results, and several examples are presented for applications of the phase-field model to understand the corrosion behavior of closely located pits, stressed material, ceramic particles-reinforced steel, and their crystallographic orientation dependence.||URI:||http://hdl.handle.net/10397/79980||EISSN:||2057-3960||DOI:||10.1038/s41524-018-0089-4||Rights:||Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
© The Author(s) 2018
The following publication Ansari, T. Q., Xiao, Z., Hu, S., Li, Y., Luo, J. -., & Shi, S. -. (2018). Phase-field model of pitting corrosion kinetics in metallic materials. NPJ Computational Materials, 4, 38, 1-9 is available at https://dx.doi.org/10.1038/s41524-018-0089-4
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