Corrosion Assessment in Reinforced Concrete Elements using Half-Cell Potentiometer – A Review

Abstract

The early failure of structure is due to the corrosion of reinforcement steel bars which leads to decrease in serviceability and durability of the structures then causing structural properties of structural elements [1,2]. Although the reinforcing steel bar is covered with concrete in passive film like form to enhance high alkalinity, if pH is enormously decreased the protecting film is damaged. To avoid the failure, forecasting of corrosion rate is to be done to reduce the maintenance cost. To this end, non-destructive evaluation methods are to estimate the corrosion rate on reinforcement bar. There are few non-destructive methods instruments are commercially available in markets. A brief comparative study has been performed and presented in this review paper using half-cell potentiometer.