A description of the distinctions between hydrogen damage and metal creep failures of waterwall boiler tubes is given. These two failure modes have many similarities in their origin and superficial characteristics, but the failure mechanisms are very different. In some instances, both mechanisms may occur in the same failure, and may each contribute, to some extent, to the failure. The presence of each failure mechanism results from distinctive root causes, and proper recognition of the failure mode(s) will influence the course of action prescribed to minimize future failures.

Subject
Hydrogen damage, Contamination, Tubes, Creep damage, Magnification, Contaminants, Mechanical failure, Waterwalls, Metals, Boilers, Creep, Deposit corrosion, Cleaning
Keywords:
boiler tube failure, hydrogen damage, creep, deposits, equilibrium phosphate, intergranular, waterwall tubing, chemical cleaning
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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