Corrosion in FGD ductwork occurs for many different reasons. If the chemistry of the flue gas stream remains relatively constant throughout one part of the system and physical and mechanical attack also remain constant, one would expect similar corrosion rates on all fronts given the same lining. But when a pattern of accelerated corrosion in one particular area of ductwork is shown other factors must be contributing to the corrosion process. In FGD outlet ducts, the presence and behavior of acid condensates create a particularly troublesome condition on ductwork floors. Special attention needs to be given to these areas. This paper reviews the solutions to these problems by use of creating better drainage of acid condensates through sloping of ductwork floors using acid resistant concrete and masonry.

Subject
Acids, Materials, Substrates, Glass, Slopes, Walls, Condensates, Chemical resistance, Flue gas, Masonry, Linings, Corrosion resistance, Concrete
© 1993 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).
1993
Association for Materials Protection and Performance (AMPP)
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