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08203 Corrosivity Monitoring System for Pipelines

Picture for 08203 Corrosivity Monitoring System for Pipelines
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Product Number: 51300-08203-SG
ISBN: 08203 2008 CP
Author: Nathan K. Brown and Fritz J. Friedersdorf
Publication Date: 2008
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$20.00
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A water corrosivity sensing system is currently under development that has the potential to combine the strengths of rate measurement techniques such as linear polarization resistance with longer-term cumulative damage measurements typically provided by electrical resistance probes. This sensor technology is applicable not only to water pipeline systems, but a broad range of liquid and gas piping systems used in military facilities as well as electric power, chemical, pulp and paper, and fossil fuel industries. The current sensor embodiment operates on a diaphragm-based principle, where the diaphragm is a sacrificial element that corrodes as the pipeline. Minute changes in diaphragm thickness can be detected by monitoring the diaphragm response to applied pressure. Diaphragm response can be measured using several techniques, including strain gage, optical gap, and capacitive methods. The current sensor embodiment described in this paper uses a high-resolution optical approach to determine the effective diaphragm thickness loss. This development effort will culminate with a field demonstration of the prototype sensing system installed in an Army trial facility.
A water corrosivity sensing system is currently under development that has the potential to combine the strengths of rate measurement techniques such as linear polarization resistance with longer-term cumulative damage measurements typically provided by electrical resistance probes. This sensor technology is applicable not only to water pipeline systems, but a broad range of liquid and gas piping systems used in military facilities as well as electric power, chemical, pulp and paper, and fossil fuel industries. The current sensor embodiment operates on a diaphragm-based principle, where the diaphragm is a sacrificial element that corrodes as the pipeline. Minute changes in diaphragm thickness can be detected by monitoring the diaphragm response to applied pressure. Diaphragm response can be measured using several techniques, including strain gage, optical gap, and capacitive methods. The current sensor embodiment described in this paper uses a high-resolution optical approach to determine the effective diaphragm thickness loss. This development effort will culminate with a field demonstration of the prototype sensing system installed in an Army trial facility.
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