During the early 70’s the oil embargo created the need for alternative power sources and since then intensive development of coal gasification technology has been carried out. In most of the commercially available technologies today, heat exchangers are used to evaporate steam at 350-450°C and some future applications may encounter temperatures up to 500-600°C such as in super-heaters. The corrosive effects of the produced syngas lead to oxidation, sulfidation, chlorination, and carburization attack with sulfidation generally being the predominant corrosion mechanism, and its corrosive potential cannot be precisely defined because it may vary widely for the different technologies, even under identical pressure and temperature conditions. Hence, testing of material in laboratory simulated environments or actual operation is the only way to gain a more precise knowledge. This paper reviews some of the published data on various alloys tested and presents data on a new high chromium-high silicon alloy 45TM in coal gasification type environments.

Subject
Sulfur, Materials, Partial pressures, Gasification, Corrosion attacks, Corrosion scales, Oxide scales, Silicon, Sulfidation, Coal, Oxygen, Aluminum alloys, Alloys
Keywords:
coal gasification, syngas, heat exchangers, sulfidation, alloy 45TM, Uns N06045
© 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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