Options for stray current corrosion monitoring in reinforced concrete structures in Slovakia

University of Zilina, Faculty of Electrical Engineering and Information Technology, 010 26 Zilina, Slovakia

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Published online: 11 June 2026

Abstract

Corrosion of steel reinforcement is a major cause of degradation in concrete structures, leading to reduced service life and increased maintenance costs. This phenomenon occurs more frequently in locations which are heavily exposed to stray currents generated mostly by DC traction systems and other DC power sources. Reliable monitoring systems are therefore essential for assessing corrosion activity and implementing timely preventive measures. This paper presents an evaluation of probes designed for monitoring corrosion of steel in reinforced concrete structures used in Slovakia and Czechia. Various monitoring systems embedded in concrete during construction are described, together with the relevant standards and norms governing their use. The experimental part focuses on measurements performed on a laboratory sample of reinforced concrete made with several types of probes. The specific types of probes reflect practical experience from Slovak and Czech infrastructure, including bridges, tunnels, retaining walls, and buried pipelines. Using standard electrochemical measurement methods, corrosion processes were observed and data from the installed probes were collected. The study examines the behavior and specifics of CMS, ERE, and Rho probes while under stress from stray currents. The results provide insight into available monitoring systems currently used. Paper forms a basis for future development and field application of monitoring techniques in reinforced concrete structures.