Cumulative localized corrosion rate and cumulative maximum localized corrosion rate factors are introduced for corrosion monitoring using coupled multielectrode array sensor probes. Maximum localized corrosion rate is the corrosion rate on any of the electrodes of a probe that has the highest corrosion rate at a given moment of time. Cumulative maximum localized corrosion rate is the corrosion rate of the electrode that has been corroded the most in a given time period. The cumulative maximum localized corrosion rate is directly related to the corrosion damage (maximum localized corrosion depth); the maximum localized corrosion depth equals the integration of the cumulative maximum localized corrosion rate. Maximum localized corrosion rate should be used for process control purposes, but cumulative maximum localized corrosion rate should be used to evaluate the localized corrosion effect on metal damage.

Subject
Sensors, Arrays, Corrosion rate, Maximum localized corrosion, Average corrosion rates, General corrosion rate, Penetration, Metals, Anodic current, Localized corrosion rates, Corrosion probes, Localized corrosion, Electrodes
Keywords:
Corrosion monitoring, corrosion sensor, localized corrosion, online sensor, crevice corrosion, corrosion probe, real-time sensor, multielectrode sensor, coupled multielectrode
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
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