Corrosion Assessment of Steel Bar in Concrete by Using Electrochemical Test Method

The assessment of steel corrosion in concrete is the global concern, particularly for RC structures in hostile environments. Despite a decade of rigorous research on steel corrosion in concrete, measuring corrosion technology continues to present. This study provided a comprehensive overview of corrosion evaluation using electrochemical methods, such as half-cell potential measurement, electrical resistivity of concrete, and rate of corrosion, after explaining the corrosion process. Half-cell potential measurement has proved a highly valuable, method of non-destructive for locating corrosion regions for monitoring, condition assessment, and estimating repair efficacy. The resistivity of concrete may reveal the permeable areas, where the penetration of chloride is most likely to be rapid and value of rate of corrosion in the future will be the highest; appropriate preventive action can be taken. Corrosion rates are classified as the average value and direct value of rate of corrosion. The average value of rate of corrosion is the medium for a long time period of measurement process by checking the weight loss or cross-sectional loss of steel bars. In contrast, the direct rate of corrosion can be measured electrochemically, specifically resistance of polarization tests. The goal of this work is not only to provide information on concrete corrosion assessment, but also to shed light on modern corrosion assessment techniques for accurate and rapid detection. © 2023 American Institute of Physics Inc.. All rights reserved.