Meeting a cathodic protection criterion does not always mean corrosion is arrested. Unbonded coatings sometimes act as a shield to cathodic protection current and allow ongoing corrosion. Hands on investigation is recommended to learn more about ones pipeline coating system and use this information for either corrective action or the design and selection of new coating systems.

Subject
Coating performance, Coating inspection, Coating application, Coatings, Cathodic protection, Pipe to soil potential, Cathodic current, Pipelines, Inspection, Surface preparation, Coating defects, Soil, Coating systems
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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