The inner surfaces and components of wet limestone flue gas desulfurization (FGD) systems are exposed to very aggressive corrosive environments. Temperatures at times approach boiling, acids can concentrate to pH levels less than 1, and chloride concentrations especially in crevice conditions often exceed 100,000 ppm. To resist these ultra-corrosive conditions advanced corrosion resistance nickel alloys are required. Some of the most recently developed alloys offer excellent resistance to environments which have caused excessive corrosion of some of the most corrosion-resistant alloys heretofore available. This paper looks at case histories of some recent applications and compares the performance of several nickel-chromium-molybdenum corrosion-resistant alloys. In addition, the corrosion performance of weldments are evaluated.

Subject
Weld attack, Materials, Corrosion resistant alloys, Stainless alloys, Filler metals, Nickel based alloys, Molybdenum alloys, Nickel chromium molybdenum alloys, Flue gas desulfurization, Weldments, Welding, Corrosion resistance, Alloys
© 1996 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).
1996
Association for Materials Protection and Performance (AMPP)
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