Corrosion Progress Evaluation of a Rebar in Concrete by the Corrosion Monitoring Using the Tafel Extrapolation

Abstract

To evaluate progress of the rebar corrosion in the RC structure quantitatively, the change with time of corrosion rate of a rebar in concrete is measured by the corrosion rate monitoring using the Tafel extrapolation method and the small size embedded sensor. As a result, using the prediction model of the corrosion rate from result of the measurement, the measurement from the middle of in-service period can estimate corrosion mass loss with around ±20％ of real corrosion mass loss.