The electrochemical background of the polarization resistance technique used to measure corrosion currents is described. Factors interferring with the interpretation of such measurements will be discussed and a modification of the Stern-Geary method will be presented. A new analysis of polarization curves is described which allows simultaneous determination of the polarization resistance and Tafel slopes and, therefore, direct determination of instantaneous corrosion currents. This new method will be demonstrated for a 24 hour test on iron in 1N H2SO4.

Subject
Corrosion currents, Corrosion rate, Slopes, Cathodic current, Iron, Current measurements, Polarization curves, Metals, Anodic current, Polarization resistance, Tafel slope, Corrosion potential, Electrode potential
© 1973 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).
1973
Association for Materials Protection and Performance (AMPP)
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