基于元胞自动机法的铝合金腐蚀行为模拟
Simulation of Aluminum Alloy Corrosion Behavior Based on Cellular Automaton Method
摘 要
基于元胞自动机方法从介观的尺度对铝合金的腐蚀行为进行模拟。结合金属的局部腐蚀机理，建立了一个新的扩散和空间分离电化学反应耦合的点蚀模型，根据阴极和阳极半反应的物理化学过程，对铝合金点蚀的扩展、离子的扩散和腐蚀产物的生成进行模拟。通过调节参数λ和ε的值模拟了蚀坑内阳极区的自催化现象，并得到了单个蚀坑的腐蚀形貌随着模拟时间的变化情况，将模拟结果与铝合金的实际腐蚀形貌进行对比。结果表明，元胞自动机方法可以实现铝合金电化学腐蚀的复杂模拟，这对于理解铝合金腐蚀以及研究材料的结构完整性有着重大的意义。
元胞自动机
腐蚀
电化学
aluminum alloy
cellular automaton
corrosion
electrochemistry
Abstract
The corrosion behavior of aluminium alloy was simulated from a mesoscopic scale based on cellular automaton method. Combined with the localized corrosion mechanism of metal, a new pitting model with the coupling between diffusion and spatially separated electrochemical reaction was established. The expansion of pitting, diffusion of ions and formation of corrosion products were simulated according to the physical and chemical processes of the cathodic and anodic semi-reactions. The autocatalytic phenomenon in anodic region was simulated by regulating the values of λ and ε, and the corrosion morphology of a single pit changing with simulation time was obtained. The simulated results were compared with the actual corrosion morphology of aluminium alloy. The results show that cellular automaton is a feasible approach to model the electrochemical corrosion of aluminum alloy, which is important to understand the corrosion of aluminum alloy and study the structural integrity of the alloy.
中图分类号 TG172.9 DOI 10.11973/fsyfh-201810011
所属栏目 应用技术
基金项目
收稿日期 2017/5/25
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引用该论文: CUI Yanyu,ZHAO Yuanyuan. Simulation of Aluminum Alloy Corrosion Behavior Based on Cellular Automaton Method[J]. Corrosion & Protection, 2018, 39(10): 794
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参考文献
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【5】PIDAPARTI R M,PALAKAL M J,FANG L. Cellular automation approach to model aircraft corrosion pit damage growth[J]. AIAA Journal,2004,42(12):2562-2569.
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【9】SAUNIER J,DYMITROWSKA M,CHAUSSE A. Diffusion,interactions and universal behavior in a corrosion growth model[J]. Journal of Electroanalytical Chemistry,2005,582:267-273.
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【14】贺俊光,文九巴,孙乐民,等. 用循环极化曲线研究Al和铝合金的点蚀行为[J]. 腐蚀科学与防护技术,2015,27(5):449-453.
【15】朱绒霞. 沿海地区飞机铝合金部件点蚀坑形成的探讨[J]. 环境作用机理与防护,2004,3(1):36-39.
【16】CAPRIO D D,VAUTRIN-UI C,STAFIEJ J,et al. Morphology of corroded surfaces:contribution of cellular automaton modelling[J]. Corrosion Science,2011,53:418-425.
【17】CAPRIO D D,VAUTRIN-UI C,STAFIEJ J,et al. Cellular automata approach for morphological evolution of localised corrosion[J]. British Corrosion Journal,2011,46:223-227.
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【19】朱立群,谷岸,刘慧丛,等. 典型高强铝合金材料的点腐蚀坑前缘特征的研究[J]. 航空材料学报,2008,28(6):61-66.
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