High temperature electrochemical techniques are increasingly used to characterize the corrosion behavior of Fe-Cr-Ni alloys in high temperature aqueous environments of the type encountered in nuclear light water reactors. In particular, the development of a reliable, internal silver/silver chloride reference electrode(1) and the development of a dual scan rate potentiodynamic procedure(2) has permitted the measurement of and correlations between steady state corrosion potentials and active-passive transitions for several Fe-Cr-Ni alloys in pH 10 water environments at temperatures up to 316°C. In these studies, effects due to changes in environment, alloy composition and specimen immersion time were observed. However, little effect of alloy thermal treatment could be detected electrochemically, though effects of thermal treatment on corrosion behavior of Fe-Cr-Ni alloys have been previously reported (3-5). Accordingly, electrochemical parameters other than those noted above were explored in an effort to determine whether effects due to heat treatment could be detected.

Subject
Noble potential, Electric current, Water, Aqueous environments, Current measurements, Electrochemical current, Current densities, Oxygen, Alloys, Electrodes, Heat treatment, Corrosion potential, Electrode potential
© 1977 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).
1977
Association for Materials Protection and Performance (AMPP)
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