Abstract
Rock bolts are widely used in the main structure of the DC transit system and play the role of the main body reinforcement and support. Because of the extensive stray current in the subway system, the corrosion risk of rock bolts is greatly increased. Therefore, the rock bolt was experimentally studied by simulating the input stray current and monitoring the polarization potential in this paper. After the stray current corrosion (SCC) process was finished, a tensile and breaking experiment of the corroded specimens was conducted for the mechanical properties. As an important parameter to indirectly characterize the corrosion strength of the stray current, the polarization potential was analyzed. Two types of rock bolts were compared for their mechanical properties and corrosion parameters. The result shows that the rock bolt with stranded steel wire as the rod has better corrosion resistance than the HRB500 rebar. Hence, the bonded stranded steel wire is more resistant to the stray current corrosion than the HRB500 rebar, which is adaptive for rock bolts in the direct current (DC) transit system.
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Acknowledgements
The authors acknowledge the Project Funded by National Science Foundation of China (NSFC) (51775543); the Natural Science Research Project of Jiangsu Higher Education Institutions (18KJB460003); the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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Wang, C., Li, W., Xin, G. et al. Experimental Research Examining the Stray Current Corrosion of Rock Bolts in the DC Transit System. Exp Tech 44, 137–148 (2020). https://doi.org/10.1007/s40799-019-00343-x
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DOI: https://doi.org/10.1007/s40799-019-00343-x