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Corrosion Behavior of Rockbolts in Simulated Underground Mining Solutions Using Macro-scale and Micro-scale Electrochemical Measurements

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Abstract

This paper focused on the corrosion of rockbolts with different S contents and yield strengths in simulated underground mining solutions using macro-electrochemical and micro-electrochemical measurements. The effect of Cl- ion on the pitting behavior was also investigated. It was found that the increase in Cl- concentration decreased the corrosion potential and corrosion current of anode polarization. The MnS inclusion was found to be the preferred site for corrosion. Based on in-situ observation and SEM characterization, it was found that the corrosion process started with the formation of corrosion trenches around the MnS, which accelerated the dissolution of the surrounding matrix.

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Acknowledgments

This study was sponsored by CCTEG Coal Mining Research Institute. Some authors also want to thank the support of Guangdong Natural Science Foundation (2020A1515011033) and National Natural Science Foundation of China (51901254).

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Author notes

  1. Weijian Yang, Shuji Zeng, and Xiaowei Chu contribute equally to the article.

Authors and Affiliations

  1. School of Materials, Sun Yat-sen University, No. 135, Xingang Xi Road, Guangzhou, 510275, People’s Republic of China

    Weijian Yang, Shuyi Zeng, Qi Guo, Yunlong Wu & Jian Xu

  2. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, People’s Republic of China

    Xiaowei Chu

  3. CCTEG Coal Mining Research Institute, Beijing, 100013, People’s Republic of China

    Xiaowei Chu

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  1. Weijian Yang
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  2. Shuyi Zeng
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  4. Qi Guo
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Correspondence to Yunlong Wu or Jian Xu.

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Yang, W., Zeng, S., Chu, X. et al. Corrosion Behavior of Rockbolts in Simulated Underground Mining Solutions Using Macro-scale and Micro-scale Electrochemical Measurements. J. of Materi Eng and Perform 30, 2632–2644 (2021). https://doi.org/10.1007/s11665-021-05612-8

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  • DOI: https://doi.org/10.1007/s11665-021-05612-8

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