Abstract
Electrochemical analysis provides a non-destructive estimation of rebar corrosion in older concrete structures as well as a real-time performance evaluation of various anti-corrosive treatments. However, the main concerns that limit inferring the rate of development and the amount of corrosion are the narrow range of responses and the lack of interdependency among the observed parameters. The selection of an adequate anti-corrosive treatment, therefore, typically depends on economic factors rather than scientific advances. In the present study, measurements of the rebar potential, polarization resistance, and impedance for RCC beam specimens exposed to 0% and 20% chloride are used to compare the anti-corrosive capabilities of embedded Zn anodes and Zn-rich coatings. The embedded Zn-anode system showed enhanced protection, showing increased corrosion resistance independent of the chloride exposure circumstances, based on a 70% drop in rebar potential, a high corrosion potential (340 mV), and a decreased net current density (by two orders of magnitude). Electrochemical potential can be successfully utilized to infer corrosion progress, according to the statistical analysis of the obtained data, which is based on the degree of correlation and fitness with the selected dependent parameters. A methodical strategic approach is presented to overcome the inherent limitations of potential-based electrochemical analysis and develop a reliable structural health monitoring system.
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Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Jayaraman, A., Vasudevan, M. & Natarajan, N. Electrochemical Assessment of Zinc-based Anti-corrosive Solutions for Reinforced Concrete Structures and Strategies for a Reliable Monitoring Plan. Iran J Sci Technol Trans Civ Eng 48, 707–725 (2024). https://doi.org/10.1007/s40996-023-01189-5
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DOI: https://doi.org/10.1007/s40996-023-01189-5