材料科学技术(英文版)2021，Vol.89Issue(30) ：158-166.

Correlation between depassivation and repassivation processes determined by single particle impingement:Its crucial role in the phenomenon of critical flow velocity for erosion-corrosion

L.L.Li Z.B.Wang S.Y.He Y.G.Zheng
材料科学技术(英文版)2021，Vol.89Issue(30) ：158-166.
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Correlation between depassivation and repassivation processes determined by single particle impingement:Its crucial role in the phenomenon of critical flow velocity for erosion-corrosion

L.L.Li 1Z.B.Wang 2S.Y.He 3Y.G.Zheng2
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作者信息

  • 1. CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China
  • 2. CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
  • 3. CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Department of Physics,Southern University of Science and Technology,Guangdong 518055,China
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Abstract

The correlation between depassivation and repassivation processes,which is significant in erosion-corrosion,was quantitatively investigated by single particle impingement tests at various flow velocities and impact angles.The results show that both repassivation and depassivation processes are associated with the kinetic energy of solid particle,and demonstrate that the repassivation is retarded by depas-sivation.This phenomenon probably results from the depassivation-induced microstructure evolution.On this basis,the dependence of critical flow velocity (CFV) for erosion-corrosion on the solid particle concentration and diameter is further theoretically predicted and experimentally verified.Accordingly,the crucial role of depassivation-repassivation in CFV phenomenon is further highlighted.

Key words

Erosion-corrosion/Stainless steel/Depassivation-repassivation/Single particle impact/Passive film

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基金项目

National Natural Science Foundation of China(51801218)

National Natural Science Foundation of China(51571200)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
被引量1
参考文献量71
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