Skip to Main content Skip to Navigation
Conference papers

Compact Passive Wireless Reinforced Concrete Corrosion Initiation Sensor That Can Be Installed in Existing Steel

Abstract : It is important to detect corrosion at the initiation stage for effective intervention to minimize the impact of corrosion. In this paper, we present a passive inductively coupled coil sensor that can detect corrosion potential with respect to a reference electrode. The sensor has a sensitivity of 0.13 kHz/mV. Several experiment results of different geometry of this sensor show that it can measure corrosion potentials with a resolution of less than 10 mV. The sensor is 25 mm in diameter and is intended to be installed by drilling a 25 mm or greater hole into existing concrete. The bottom of the hole is filled with mortar and the sensing electrodes are embedded within the mortar. Chlorides from the concrete diffuse into the mortar eventually reaching the electrodes leading to rise in the corrosion potential. This corrosion potential can be used indicate the level of chlorides within the concrete. The generated potential is a measure of the transfer of electron charge between the metal and its environment, here between the steel and the concrete. This is a property of the steel/concrete interface and not of the metal itself. Thus, it is impossible to determine the absolute value of this electrochemical potential and it is necessary to have a reference electrode to measure the potential difference of steel with respect to this reference electrode. The presented sensor can be fabricated at very low cost and is suitable for corrosion monitoring of existing structures.
Complete list of metadata

Cited literature [11 references]  Display  Hide  Download
Contributor : Anne Jaigu Connect in order to contact the contributor
Submitted on : Wednesday, July 9, 2014 - 10:25:41 AM
Last modification on : Wednesday, July 9, 2014 - 3:27:04 PM
Long-term archiving on: : Thursday, October 9, 2014 - 11:29:04 AM


Files produced by the author(s)


  • HAL Id : hal-01021239, version 1



Khalada Perveen, Greg E. Bridges, Sharmistha Bhadra, Douglas J. Thomson. Compact Passive Wireless Reinforced Concrete Corrosion Initiation Sensor That Can Be Installed in Existing Steel. EWSHM - 7th European Workshop on Structural Health Monitoring, IFFSTTAR, Inria, Université de Nantes, Jul 2014, Nantes, France. ⟨hal-01021239⟩



Record views


Files downloads