This publication examines the issue of hydrogen embrittlement of CRA materials under the cathodic protection conditions often found in the up stream oil and gas industry. The environment in question is thus oxygenated seawater. The different possible mechanisms of hydrogen embrittlement for CRA materials under these conditions are discussed, as are the different factors affecting susceptibility and mitigation of susceptibility. The susceptibility of the different classes of materials is examined, and susceptible materials highlighted. The importance of undertaking a materials/CP review at different stages of a given project is proposed, and two case studies are described. Finally, a flow plan is put forward indicating the procedures that can be followed.

Subject
Steel structures, Hydrogen embrittlement, Materials, Stainless alloys, Cathodic protection, Nickel based alloys, Permeability, Welding, Lead, Mechanical failure, Metals, Monel alloys, Hydrogen
© 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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