A computer advice system that addresses alloy scaling corrosion by gases has been created. The system considers corrosion mechanisms that form corrosion products based upon mixtures of sulfide and oxide compounds (sulfidation and mixed sulfidation/oxidation). Uses of the system include assisting alloy selection, designing equipment, analyzing failed components, and studying alloy corrosion. Corrosion data from diverse sources are screened, archived, statistically analyzed, and then used to construct equations that are consistent with theoretical understanding. Corrosion kinetics are correlated with gas composition, temperature, exposure time, and alloy composition. Extrapolations and interpolations, relative to the data bases, are possible and clearly indicated. There are currently about 50 commercially available alloys in the data bases and they represent a significant sample of the alloys commonly used in high temperature process equipment. The incentives to create the privately developed and operated system, concepts used, and the system logic are described.

Subject
Stability, Correlation, Corrosion rate, Corrosion products, Commercial alloys, Experimental data, Gas composition, Sulfidation, Corrosion data, Sulfides, Gases, Corrosion mechanisms, Alloys
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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