SCC in oxidizing environments such as in BWRs is very effectively mitigated by electrocatalysis of wetted surfaces provided there is a stoichiometric excess of reductants over oxidants. The mechanisms and criteria for effective SCC mitigation are summarized, with particular focus on the critical location for the catalyst in a crack and recent experimental support for these concepts. Resolution of vulnerabilities of electrocatalysis are addressed from theory and experiment.

Subject
Crack growth, Water, Corrosion rate, Diffusion, Noble metals, Corrosion cracking, Crack chemistry, Intergranular cracking, Crack length, Stainless steel, Cracks, Corrosion potential, Stress corrosion cracking
Keywords:
stress corrosion cracking, crack mitigation, catalysis, platinum, high temperature water, stainless steel, crack growth rate, corrosion potential
© 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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