External corrosion direct assessment process (ECDA) implemented in accordance with the NACE Recommended Practice RP0502-02 relies on above ground DA techniques to prioritize locations at risk for corrosion. Frequently, common ECDA techniques (such as CIS, DCVG) are employed in locations affected by stray currents. The paper investigates the limitations to applicability of the CIS and DCVG techniques under stray current conditions.

Subject
Holidays, External corrosion direct assessment, Piping, Electrochemical noise, Stray current interference, Pipelines, Defects, Anomalies, DC interference, Equipment, Electric potential, Stray current, AC interference
Keywords:
ECDA, CIS, DCVG, stray current, limitations, resolution, measurements
© 2008 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).
2008
Association for Materials Protection and Performance (AMPP)
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