Internal corrosion of oil/ballast water pipes on oil tankers is a major problem which causes expensive and laborious repairs. A specially arranged internal cathodic protection could be the solution to this problem. The effect of two different designs of galvanic cathodic protection has been studied in a one year pilot investigation, partly with a so called wire anode, extending throughout the entire pipe system, and partly with a single anode. The current distribution from the single anode along the pipe was controlled by potential measurements vs. permanent reference electrodes. A two year investigation was also made with wire anodes installed in the pipes of an oil tanker in normal service.

Subject
Pipe surfaces, Water, Materials, Piping, Anodic protection, Cathodic protection, Zinc anodes, Couplings, Reference electrodes, Wiring, Inspection, Corrosion attacks, Anodes
© 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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