Close interval potential surveys (CIPS) are the backbone of pipeline integrity. They determine the effectiveness of the cathodic protection system which provides protection against corrosion. Direct current voltage gradient surveys (DCVG) indicate defects or damage in the coating on the pipeline but do not indicate the level of cathodic protection. CIPS and DCVG surveys have traditionally been undertaken independently making it difficult to correlate coating defects with the level of cathodic protection as indicated by pipe-to-soil potentials. This paper will explore the effectiveness of combined CIPS and DCVG surveys for improved data correlation.

Subject
Voltage, Cathodic protection, Pipe to soil potential, Reference electrodes, Pipelines, Close interval potential surveys, Coating surveys, Rectifiers, Defects, Equipment, Engineers, Cathodic protection survey, Coating defects
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
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