The basic corrosion process is reviewed and the factors influencing the thermodynamic driving force are discused. The roles played by both the coating and the cathodic protection system are discused and the relationship between the two systems relating to corrosion under a coating film is shown. The importance of treating the coating as part of the cathodic protection system is explained. The need to be aware of the engineering variables of the pipe coating, not only as applied, but as a function of time is presented.

Subject
Steel structures, Water, Coatings, Materials, Piping, Cathodic protection, Corrosion reactions, Mechanical failure, Engineers, Oxygen, Polyethylene, Electrical resistance, Half cells
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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