For both safety and environmental reasons, external protection of burmed bullet tanks and above ground storage tank bottoms is now at the top of our industry’s worldwide priorities. To protect these buried structures it is essential to provide efficient cathodic protection systems, combined with external coatings. In fact, regulations in many countries now require the use of both active and passive protection. Cathodic protection for these buried structures presents a real challenge due to the large and complex geometries involved and the proximity of the anodes to the target structure.

This paper details new design criteria for protecting these structures and providing a more efficient engineered solution that will ensure long-term corrosion-free service. It also discusses the field performance assessment of polymeric anode systems installed on both above ground storage tanks and LPG bullet tanks that have been in service for more than five years.

Subject
Circuits, Voltage, Anodic protection, Cathodic protection, Sand, Cables, Impressed current anodes, Coke, Anodic current, Aboveground storage tanks, Tank bottoms, Electrodes, Anodes
Keywords:
cathodic protection, storage tanks, LPG tanks, polymeric anodes, voltage gradient
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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