The corrosion behavior of several steels and nickel-based alloys in high-temperature water was analyzed using a mechanistic model described by Marcus and co-workers. The model was used because it allows for different behavior at short and long times. The analysis provided good fits to the data, and provides an explanation for results previously considered anomalous. It was discovered that the amount of total corrosion of a material deviated from normal parabolic behavior depending on the value of a critical model parameter, xd, the “characteristic film thickness,” which is determined by fitting the data. Materials with intermediate values of xd have apparent corrosion rates that are sensitive to the amount of pick-up of species from other sources, e.g., corrosion of other materials within the same system.

Subject
Mechanistic models, Films, Thin films, Materials, Corrosion rate, Autoclaves, Oxide films, Corrosion behavior, Corrosion modeling, Film formation, Metals, Film thickness, Corrosion data
© 2016 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).
2016
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.