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Sensors 2010, 10(4), 4145-4158; doi:10.3390/s100404145
Article

Corrosion Sensor for Monitoring the Service Condition of Chloride-Contaminated Cement Mortar

*  and
Received: 4 March 2010; in revised form: 13 April 2010 / Accepted: 19 April 2010 / Published: 26 April 2010
(This article belongs to the Section Physical Sensors)
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Abstract: A corrosion sensor for monitoring the corrosion state of cover mortar was developed. The sensor was tested in cement mortar, with and without the addition of chloride to simulate the adverse effects of chloride-contaminated environmental conditions on concrete structures. In brief, a linear polarization resistance method combined with an embeddable reference electrode was utilized to measure the polarization resistance (Rp) using built-in sensor electrodes. Subsequently, electrochemical impedance spectroscopy in the frequency range of 1 kHz to 50 kHz was used to obtain the cement mortar resistance (Rs). The results show that the polarization resistance is related to the chloride content and Rs; ln (Rp) is linearly related to the Rs values in mortar without added chloride. The relationships observed between the Rp of the steel anodes and the resistance of the surrounding cement mortar measured by the corrosion sensor confirms that Rs can indicate the corrosion state of concrete structures.
Keywords: corrosion sensor; cement mortar resistance; corrosion rate; reference electrode; linear polarization resistance corrosion sensor; cement mortar resistance; corrosion rate; reference electrode; linear polarization resistance
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Lu, S.; Ba, H.-J. Corrosion Sensor for Monitoring the Service Condition of Chloride-Contaminated Cement Mortar. Sensors 2010, 10, 4145-4158.

AMA Style

Lu S, Ba H-J. Corrosion Sensor for Monitoring the Service Condition of Chloride-Contaminated Cement Mortar. Sensors. 2010; 10(4):4145-4158.

Chicago/Turabian Style

Lu, Shuang; Ba, Heng-Jing. 2010. "Corrosion Sensor for Monitoring the Service Condition of Chloride-Contaminated Cement Mortar." Sensors 10, no. 4: 4145-4158.


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