J. Mater. Sci. Technol. ›› 2012, Vol. 28 ›› Issue (5): 427-432.

• Reviews • 上一篇    下一篇

Mesoscopic simulation of diffusion characteristics in the corrosion film

王海涛1,韩恩厚2   

  1. 1. 中国科学院金属研究所
    2. 中国科学院金属研究所腐蚀与防护国家重点实验室
  • 收稿日期:2011-05-12 修回日期:2011-08-26 出版日期:2012-05-30 发布日期:2012-05-29
  • 通讯作者: 王海涛
  • 基金资助:

    National Science and Technology Major Project;National Natural Science Foundation of China

Mesoscopic Simulation of Diffusion Characteristics in the Corrosion Film

Haitao Wang, En-Hou Han   

  1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-05-12 Revised:2011-08-26 Online:2012-05-30 Published:2012-05-29
  • Contact: Hai-Tao Wang
  • Supported by:

    the National Science and Technology Major Project (No. 2011ZX06004{009) and the National Natural Science Foundation of China (No. 51001110)

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摘要： A cellular automata model is used to study the diffusion characteristics in the corrosion film at a mesoscopic scale. The model focuses on a metal/film/electrolyte system, including a series of local evolution rules. The effect of diffusion rate on the film growth and metal corrosion is investigated. The result shows that the growth rate of the film follows a power law with the diffusion steps, and the corrosion rate has the same law as that of the film growth in the model with the feedback effect. There exists a diffusing plane in the film, where the concentration of the diffusing species does not depend on time. The diffusion steps are found to have a great influence on the position and species concentration of the diffusing plane.

Abstract: A cellular automata model was used to study the diffusion characteristics in the corrosion film at a mesoscopic scale. The model focused on a metal/film/electrolyte system, including a series of local evolution rules. The effect of diffusion rate on the film growth and metal corrosion was investigated. The result showed that the growth rate of the film followed a power law with the diffusion steps, and the corrosion rate had the same law as that of the film growth in the model with the feedback effect. There existed a diffusing plane in the film, where the concentration of the diffusing species did not depend on time. The diffusion steps were found to have a great influence on the position and species concentration of the diffusing plane.

Key words: Corrosion, Simulation, Diffusion, Cellular automata