Linear Polarization Resistance Sensor Using the Structure as aWorking Electrode

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Douglas W. Brown Richard J. Connolly Duane R. Darr Bernard Laskowski

Abstract

A direct method of measuring corrosion on a structure using a micro-linear polarization resistance (mLPR) sensor is presented. The sensor includes three electrodes, where each electrode is fabricated on a flexible substrate to create a circuit consisting of gold-plated copper. The first two electrodes, or the counter and reference electrodes, are configured in an interdigitated fashion with a separation distance of 8mil. The flex cable contains a porous membrane between the pair of electrodes and the structure. A third electrode, or the working electrode makes electrical contact to the structure through a 1mil thick electrically conductive transfer tape placed between the electrode and structure. The reference and counter electrodes are electrically isolated from the working electrode and physically separated from the surface of the structure by 1mil. The flex cable can be attached to the structure through the use of adhesives or in the case of placement in a butt joint or lap joint configuration, by the joint itself. Corrosion is computed from known physical constants, by measuring the polarization resistance between the electrolytic solution and the structure. A controlled experiment using the ASTM G85 Annex 5 standard verifies the precision and accuracy of sensor measurements by comparing the estimated mass loss with witness coupons.

How to Cite

Brown, D. W., Connolly, R. J., Darr, D. R., & Laskowski, B. (2014). Linear Polarization Resistance Sensor Using the Structure as aWorking Electrode. PHM Society European Conference, 2(1). https://doi.org/10.36001/phme.2014.v2i1.1555
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Keywords

corrosion, sensors, structural health monitoring

References
Bockris, J. O., Reddy, A. K. N., & Gambola-Aldeco, M. (2000). Modern electrochemistry 2a. fundamentals of electrodics (2nd ed.). New York: Kluwer Academic/ Plenum Publishers.
Buchheit, R. G., Hinkebein, T., Maestas, L., & Montes, L. (1998, March 22-27). Corrosion monitoring of concrete-lined brine service pipelines using ac and dc electrochemical methods. In Corrosion 98. San Diego, Ca.
Burstein, G. T. (2005, December). A century of tafel’s equation: 1905-2005. Corrosion Science, 47(12), 2858- 2870.
G102, A. S. (1994). Standard practice for calculation of corrosion rates and related information from electrochemical measurements. Annual Book of ASTM Standards, 03.02.
G59, A. S. (1994). Standard practice for conducting potentiodynamic polarization resistance measurements. Annual Book of ASTM Standards, 03.02.
Harris, S. J., Mishon, M., & Hebbron, M. (2006, October). Corrosion sensors to reduce aircraft maintenance. In Rto avt-144 workshop on enhanced aircraft platform availability through advanced maintenance concepts and technologies. Vilnius, Lithuania.
Huston, D. (2010). Structural sensing, health monitoring, and performance evaluation (B. Jones & W. B. S. J. Jnr., Eds.). Taylor and Francis. Introduction to corrosion monitoring. (2012, August 20). Online. Available from http://www.alspi.com/introduction.htm
Twomey, M. (1997). Inspection techniques for detecting corrosion under insulation. Material Evaluation, 55(2), 129-133.
Wagner, C., & Traud, W. (1938). Elektrochem, 44, 391.
Section
Technical Papers

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