Galvele introduced a new quantitative framework for localized corrosion through his seminal paper on acidification and chloride accumulation in pits and the need for a critical product of current density and pit depth to sustain this local chemistry. This concept, introduced in 1976, holds good today, but has been enhanced by the ability to conduct more complex computations, better modeling of concentrated solutions that could be present in local areas, and the ability to perform in-situ chemical analyses in pits. The purpose of this paper is to review the progress in these areas with a particular focus on the relationship between localized chemistry and repassivation potential. The paper discusses the results of different reactive-transport modeling approaches in understanding local chemistry changes during repassivation, and the use of different in-situ chemical analyses in understanding localized corrosion.

Subject
Pits, Salts, Repassivation, Repassivation potentials, Corrosion initiation, Crevices, Current densities, Corrosion modeling, Film formation, Metals, Localized corrosion, Electrodes, Electrolytes
Keywords:
Localized corrosion, pitting, crevice corrosion, repassivation potential, pH, chloride, stainless steels, Ni-base alloys
© 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)
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