Abstract
Electrochemical techniques are practical and powerful for monitoring the corrosion process of rebar in the concrete. A brief review of electrochemical techniques used in the concrete industry is given in this paper. The corrosion process of rebar in the concrete with the immersion in NaCl solution was studied with Linear Polarization Resistance (LPR) technique, Electrochemical Frequency Modulation (EFM) and Electrochemical Impedance Spectroscopy (EIS). Polarization resistance of rebar using LPR, EFM and EIS techniques exhibits a good agreement to some degree in the present researches. Analysis of EIS for rebar in the concrete was discussed. An integration of multiple electrochemical techniques into one system is practical and useful for the corrosion monitor and corrosion mechanism of rebar in the concrete.
