In the laboratory tests described in the present paper, it was found that differences in the surface history during the test startup phase could lead to variations of up to two orders of magnitude in the steady state corrosion rates observed. The existence of such multiple steady states therefore invalidates the popular belief that CO2 corrosion can be predicted from a simple equation. Any reliable prediction technique must necessarily be based on a detailed understanding of the mechanisms which govern the protectiveness of corrosion layers, together with the ability to control the hysteresis between acquisition and loss of protectiveness, and a better analysis of the influence of service conditions of this process.

Subject
Cementite, Corrosion rate, Oxide layers, Sodium chloride, Iron, Iron content, Solubility, Siderite, Precorrosion, Acidity, Sodium chloride solution, Steel, Corrosion protection
© 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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