The corrosion of URD cable direct buried concentric neutral wires has been found on many underground installations across the United States. Corrosion investigators, to date, have clearly proven the prevailing corrosion mechanisms to be of a galvanic or stray DC current nature. Furthermore, mitigative strategies including cathodic protection have been devised and shown to be effective.

Testing under laboratory conditions has consistently associated the corrosion of concentric neutrals with AC current. However, field investigations have not commonly reported any problems from AC current corrosion.

Subject
Materials, Insulation, Aluminum, Inspection, Installation, Joints, Corrosion products, Cables, Current densities, Copper, Galvanic current, Soil, Types of corrosion
© 1987 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).
1987
Association for Materials Protection and Performance (AMPP)
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