SUMMARY

This paper presents results obtained using a computer program to evaluate the performance of a cathodic protection system of a North Sea platform. The CP software model package has been developed using potential and current density readings obtained from existing offshore structures.

The data presented in this paper was obtained from a platform jacket protected by a hybrid CP system. The jacket showed good protection with areas of overprotection. This study examined the possibilities of avoiding overprotection and retrofitting sacrificial anodes to the pile sleeve area. A computer model was used to establish optimum parameters for the retrofit and for subsequent operation of the impressed current system. The main areas of application of this approach is as follows:

  • Design of CP for offshore platforms

  • CP trouble shooting and retrofitting of anodes

  • Training simulator

  • Diagnosis, support of CP surveys, CP maintenance and operation.

Subject
Galvanic anodes, Modeling, Overprotection, Impressed current anodes, Negative potentials, Current densities, Steel, Electric potential, Piles, Impressed current, Jackets, Calcareous deposits, Electrode potential
© 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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