The nature of coal ash corrosion and factors affecting its severity are examined. Laboratory results for iron- and nickel-base alloys from a number of sources are compared. Flue gas composition (SO2 content), coal ash alkali sulfate content, surface temperature and alloy composition are related to corrosion behavior. Results from in situ plant exposures will also be discussed; the role of key alloying elements will be addressed.

Subject
Materials, Corrosion resistant alloys, Corrosion rate, Metal surfaces, Nickel based alloys, Molybdenum alloys, Sulfates, Corrosion attacks, Superalloys, Ash, Boilers, Coal, Alloys
Keywords:
coal ash corrosion, oxidation, sulfidation, alkali sulfates, laboratory testing, field exposure, alloying elements, ferritic steels, austenitic stainless steels, nickel-containing alloys
© 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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