Corrosion tests were conducted at 500°F(260°C) and 600°F(316°C) in simulated municipal solid waste (MSW) boiler flue gas with bare coupons and coupons coated with chloride salts, sulfate salts, or salt mixtures. Alloys tested were carbon steel, Alloy 825 (UNS N08825), and Alloy 625 (UNS N06625). Both oxidizing and reducing gases with HCl were tested. Carbon steel suffered high corrosion rates when covered with chloride containing salts in both oxidizing and reducing gases at 600°F(316°C). The oxidizing gas/chloride salt environment appeared more corrosive than the reducing gas/chloride salt environment. The sulfate salts were less aggressive than the chloride salts. Corrosion rates were much higher at 600°F(316°C) than 500°F(260°C). N08825 and N06625 were resistant to all test conditions.

Subject
Salts, Corrosion rate, Tubes, Steel coupons, Metals, Steel, Boilers, Carbon steel, Gases, Corrosion coupons, Deposit corrosion, Alloys, Chlorides
Keywords:
MSW boilers, salt corrosion, gaseous HCl corrosion, carbon steel, nickel alloys
© 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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