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.

Subject
Electric current, Piping, Voltage, Chainage, Pipelines, Coating damage, Constants, Rectifiers, Electric potential, Remote monitoring, Electrical resistance probes, Instant off potential, Line current
Keywords:
Cathodic Protection, Remote Monitoring, Electrical Resistance Probes, Polarized Potential, Instant-Off, GPS, Line Current, Coating Defect
© 2022 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2022
Association for Materials Protection and Performance (AMPP)
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