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Vol. 214, Issue 7, July 2017, pp. 28-33




Membrane-Coated Electrochemical Sensor for Corrosion Monitoring in Natural Gas Pipelines

1 J. Beck, 1 D. M. Hall, 2 M. Ziomek-Moroz and 1, 3, 4 S. N. Lvov

1 Earth Mineral Sciences Energy Institute, The Pennsylvania State University, University Park, PA 16802, USA
2 National Energy Technology Laboratory, U.S. Department of Energy, Albany, OR 97321, USA
3 Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA 16802, USA
4 Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA

E-mail: Margaret.Ziomek-Moroz@netl.doe.gov, lvov@psu.edu


Received: 1 June 2017 /Accepted: 12 July 2017 /Published: 31 July 2017

Digital Sensors and Sensor Sysstems


Abstract: Electrochemical sensors can be used for a wide range of online in- situ process monitoring applications. However, the lack of a consistent electrolyte layer has previously limited electrochemical monitoring in gas and supercritical fluid streams. A solid state sensor is being designed that uses an ion conducting membrane to perform conductivity and corrosion measurements in natural gas pipelines up to 1000 psi. Initial results show that membrane conductivity measurements can be correlated directly to water content down to dew points of 1C with good linearity. Corrosion monitoring can also be performed using methods such as linear polarization resistance and electrochemical impedance spectroscopy (EIS), though care must be taken in the electrode design to minimize deviation between sensors.


Keywords: Sensor, Corrosion, Conductivity, Electrochemical impedance spectroscopy, Natural gas, High-pressure, Moisture, Carbon dioxide.


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