Metal oxide activated tubular titanium anodes (LIDA* anodes) mounted onto tensioned cables are being installed onto five offshore structures in the Gulf of Mexico. The economics, design, and installation of these retrofit impressed current anode systems are discussed. The installed cost of these impressed current systems will be less than 1/2 of the cost for retrofitting the structure with aluminum anodes. The design includes a secondary installation rope and a shear pin near the top of the assembly. The secondary rope allows initial installation of the system without divers and reinstallation without divers in case of shear pin failure.

Subject
Steel structures, Costs, Water, Galvanic anodes, Offshore structures, Installation, Springs, Cables, Impressed current anodes, Rectifiers, Shear, Impressed current, Anodes
Keywords:
oxide anodes, ceramic anodes, cathodic protection, sea water
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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