Corrosion of underground infrastructures under metro-induced stray current: A review

Corrosion poses a significant risk to critical infrastructures. Practice indicates that metro-induced stray current corrosion is a significant threat to underground infrastructures, which may be an obstacle to expanding the subway transportation network. The present study employed bibliometric analysis to capture the evolution of research progress, gaps, and future directions in this field. A comprehensive review was conducted on the mechanisms of stray current corrosion in subway systems and its detrimental effects on track infrastructure. Commentaries emphasized the importance of incorporating measures to address stray current corrosion into the construction, design, and planning of subway projects. Specific recommendations were put forth for governments, industries, and research institutions, encompassing policy considerations, safety measures, economic factors, and technological advancements.