The effectiveness of cathodic protection to control corrosion of steel components of concrete pipelines has become widely accepted. Both field and laboratory results have been presented for many years demonstrating the effectiveness of cathodic protection. However, it has frequently been reported that cathodic protection is only required under a limited number of conditions particularly where there is a damaged structure involved. 1,2,3  This paper will address itself to three questions:

  1. Under what conditions is cathodic protection required for concrete pipelines?

  2. What pipe-to-soil potential criterion should be used?

  3. What cathodic protection current densities are required?

Subject
Piping, Cathodic protection, Pipe to soil potential, Pipelines, Soil resistivity, Potential measurements, Current densities, Steel, Cement, Chlorides, Soil, Damage, Concrete
© 1978 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).
1978
Association for Materials Protection and Performance (AMPP)
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