Linear Polarization Resistance Sensor Using the Structure as aWorking Electrode
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
corrosion, sensors, structural health monitoring
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.
The Prognostic and Health Management Society advocates open-access to scientific data and uses a Creative Commons license for publishing and distributing any papers. A Creative Commons license does not relinquish the author’s copyright; rather it allows them to share some of their rights with any member of the public under certain conditions whilst enjoying full legal protection. By submitting an article to the International Conference of the Prognostics and Health Management Society, the authors agree to be bound by the associated terms and conditions including the following:
As the author, you retain the copyright to your Work. By submitting your Work, you are granting anybody the right to copy, distribute and transmit your Work and to adapt your Work with proper attribution under the terms of the Creative Commons Attribution 3.0 United States license. You assign rights to the Prognostics and Health Management Society to publish and disseminate your Work through electronic and print media if it is accepted for publication. A license note citing the Creative Commons Attribution 3.0 United States License as shown below needs to be placed in the footnote on the first page of the article.
First Author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 United States License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.