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A Remote Monitoring System Featuring GPS Synchronized Instant-Off Potential And Line-Current Measurements

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There are several ways to validate the performance of a cathodic protection (CP) system for buried pipelines. Over the years, pipeline networks and their corrosion challenges have become increasingly complicated, not least due to the many sources of both AC and DC interference that affects CP operation. Also, the various measurement techniques that can be applied to test CP effectiveness has increased over the years. Finally, the sheer number of buried pipeline miles has been constantly increasing.

Product Number: 51322-17635-SG
Author: Andreas Junker Olesen, Lars Vendelbo Nielsen
Publication Date: 2022
Industries: Cathodic Protection , Corrosion Monitoring and Control , Coatings
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The traditional instant-off survey is time-consuming and will not provide information on the continuous evolution of the pipeline instant-off potential. This paper presents results from a small- and large-scale test of a remote-controlled GPS time-synchronized remote monitoring system, that is capable of capturing the instant-off potential at every logger position, when synchronized with a rectifier interrupter unit. Additionally, the loggers have a built-in line-current measurement module, that allows for detection of changes in the CP consumption in between logger positions, allowing for detection of 3rd party coating damage incidents. Finally, the loggers are capable of full AC/DC interference analysis with associated ER probe corrosion rate measurements.

The traditional instant-off survey is time-consuming and will not provide information on the continuous evolution of the pipeline instant-off potential. This paper presents results from a small- and large-scale test of a remote-controlled GPS time-synchronized remote monitoring system, that is capable of capturing the instant-off potential at every logger position, when synchronized with a rectifier interrupter unit. Additionally, the loggers have a built-in line-current measurement module, that allows for detection of changes in the CP consumption in between logger positions, allowing for detection of 3rd party coating damage incidents. Finally, the loggers are capable of full AC/DC interference analysis with associated ER probe corrosion rate measurements.

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