A novel in-situ corrosion monitoring electrode for reinforced concrete structures

Abstract

In this study, an embeddable in-situ corrosion monitoring electrode based on Ce-doped NiFe2O4 was fabricated, and their corrosion performance of the steel rebar was evaluated in the simulated concrete environment under passive and active conditions. The passive and active environment consists of simulated concrete pore solution (SCPS) without and with 3% NaCl. The corrosion performance of embedded steel rebar in concrete was monitored by exposing the concrete specimens under alternate dry and wet condition in 3% NaCl solution. The corrosion behavior of the steel rebar was studied by using open circuit potential, AC-impedance, and potentiodynamic polarization studies. The relative corrosion performance of the embeddable steel rebar was assessed with fabricated corrosion monitoring electrode (FCME) and compared with the surface mounted electrode (SME) by using saturated calomel electrode (SCE). The results revealed that the FCME could use as an in-situ electrode for assessing the corrosion monitoring of the reinforced concrete structures. (C) 2017 Elsevier Ltd. All rights reserved.