High alloy stainless steels, such as superduplex and 6%Mo, have been extensively used for seawater cooling systems and in reverse osmosis desalination plants. From time to time corrosion has been observed at flange faces that is not attributable to poor quality material or excessively severe operating conditions. Over the last fifteen years there have been studies looking at corrosion of flanged joints. Some have investigated flange materials, while others have looked at different gasket materials. The present paper reviews the published data and presents some field experience from the authors’ company. These are combined to present some recommendations on combinations to be avoided and the best choice of suitable gaskets for systems operating at different pressures.

Subject
Materials, Stainless alloys, Molybdenum alloys, Gaskets, Flanges, Seawater, Joints, Graphite, Crevices, Fibers, Crevice corrosion, Stainless steel, Titanium alloys
Keywords:
seawater, crevice corrosion, stainless steels, gaskets
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
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