Internal deposits have two potential adverse effects on waterwall tubes: a. under-deposit corrosion and hydrogen damage; and b. insulating effects with subsequent metal-temperature increases. Repeated chemical cleanings may not completely remove scab-like deposits. Hydrogen failures can occur several years after the original chemical upset. This paper presents examples of delayed failures and temperature effects of internal deposits.

Subject
Hydrogen damage, Carbides, Microstructure, Tubes, Intergranular cracking, Waterwalls, Metals, Steel, Scale, Boilers, Deposit corrosion, Conductivity, Hydrogen
Keywords:
Hydrogen Damage, ID Scale, Creep Failures, Waterwall Tubes
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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