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Multi-state Markov modeling of pitting corrosion in stainless steel exposed to chloride-containing environment

机译：含氯环境下不锈钢点蚀的多状态马尔可夫模型

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摘要

Although stainless steels (SSs) have excellent general corrosion resistance, they are nevertheless susceptible to pitting corrosion. The variation of pit depth and density is significant for the prediction of likelihood of corrosion damage occurring in service. Among the available pitting corrosion models, it is difficult to identify a specific model capable of characterizing all the pit formation processes observed and one that can be used for estimating the evolution of pit density distribution with time. A physics-based multi-state Markov model giving a full description of pitting corrosion states is presented. The transition rates used in the model are determined by fitting the model to experimental data. The variation of pit depth and density is simulated. The simulation is verified by experimental scenarios of SS exposed to chloride-containing environments. (C) 2017 Elsevier Ltd. All rights reserved.
机译：尽管不锈钢（SSs）具有出色的耐一般腐蚀性能，但它们仍易于产生点蚀。凹坑深度和密度的变化对于预测使用中发生腐蚀损坏的可能性具有重要意义。在可用的点蚀模型中，很难确定一种能够表征观察到的所有点蚀过程的模型，并且可以用来估计点蚀密度分布随时间的变化。提出了基于物理的多状态马尔可夫模型，全面描述了点蚀状态。通过将模型拟合到实验数据，可以确定模型中使用的过渡速率。模拟了坑深和密度的变化。通过暴露于含氯环境的SS的实验场景验证了该模拟。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Reliability Engineering & System Safety》 |2018年第4期|239-248|共10页
  • 作者

    Xie Yi; Zhang Jinsuo; Aldemir Tunc; Denning Richard;

  • 作者单位

    Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA;

    Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA;

    Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA;

    Ohio State Univ, Nucl Engn Program, Columbus, OH 43210 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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