Abstract
The paper will briefly describe the cathodic protection systems used for the first generation of semi-submsersible rigs in the North Sea and the experience gained.
An extensive research in the last 7 years has put high-lights to the original design criteria with respect to current density requirements, calculation of anode output and lifetime, anode’s shape and strength. From this a second generation cathodic protection system was generated.
The paper will also give some experiences gained with the "new" systems. Furthermore the paper will give examples on good and bad cathodic protection systems and will also give examples of how to retrofit the cathodic protection system which mainly has been designed for five years service.
© 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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