Laboratory corrosion tests simulating environments of superheater tubes in waste incinerators were conducted to obtain information on the performance of 17 commercial "corrosion resistant" steels and alloys. The steels and alloys were corroded in a simulated flue gas atmosphere containing 1000 ppm HCl -50 ppm SO2 -10% O2 -10% CO2 -20% H2O -bal.N2 at 450 and 550° C for 50 and 100 h. These corrosion tests were conducted at five different laboratories. Four types of corrosive ashes, two tube deposits taken from a stoker-type furnace and a fluidized bed combustor, and two synthetic ashes with different chemistry, were used to simulate the corrosion environments. Corrosion weight-loss measurements as well as microscopic observations were performed to evaluate resistance of steels and alloys not only to general corrosion but also to localized corrosion such as grain boundary attack.

Subject
Coatings, Molybdenum, Corrosion resistant alloys, Nickel based alloys, Tubes, Molybdenum alloys, Chromium, Corrosion testing, Steel, Ash, Corrosion resistance, Deposit corrosion, Alloys
Keywords:
high temperature corrosion, waste incinerator, waste-to-energy plant, fireside corrosion, fuel slag corrosion, hot corrosion
© 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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