腐蚀损伤的相场模拟

IF 2.7 4区材料科学 Q3 ELECTROCHEMISTRY

Corrosion Reviews Pub Date : 2022-05-16 DOI:10.1515/corrrev-2021-0063

A. Imanian, M. Amiri

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引用次数: 1

摘要

摘要提出了一种基于相场的电化学模型来模拟电偶腐蚀。通过将PF变量与电化学耦合，得到了阳极和阴极表面电解质电势和电流密度的分布。在不跟踪演化边界的情况下，通过求解PF方程自然地获得了表面衰退的演化。数值实现包括在固定网格上求解控制方程。作为PF模型极限的尖锐界面通过渐近分析得到。讨论了两个基准问题：暴露在5%NaCl溶液中的镁合金-软钢偶和镍在1N硫酸中的缝隙腐蚀。考虑到可用的实验数据以及通过任意拉格朗日-欧拉方法的其他模拟数据，进行了比较。达成了良好的协议。

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Phase field modeling of corrosion damage

Abstract A phase field (PF) based electrochemical model is presented for simulation of galvanic corrosion. Distributions of electrolyte potential and current density on anode and cathode surfaces are obtained by coupling the PF variable with electrochemistry. Evolution of surface recession is naturally obtained by solving the PF equations without tracking the evolving boundary. Numerical implementation involves solving the governing equations on a fixed mesh. The sharp interface as the limit of the PF model is shown by an asymptotic analysis. Two benchmark problems are discussed: a magnesium alloy–mild steel couple exposed to 5% NaCl solution and crevice corrosion for nickel in 1 N sulfuric acid. A comparison is made considering available experimental data as well as other simulation data by an arbitrary Lagrangian–Eulerian method. Good agreement is obtained.

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来源期刊

Corrosion Reviews 工程技术-材料科学：膜

CiteScore

5.20

自引率

3.10%

发文量

审稿时长

4.5 months

期刊介绍： Corrosion Reviews is an international bimonthly journal devoted to critical reviews and, to a lesser extent, outstanding original articles that are key to advancing the understanding and application of corrosion science and engineering in the service of society. Papers may be of a theoretical, experimental or practical nature, provided that they make a significant contribution to knowledge in the field.