Abstract
The "stepping down the current (SDC)" method measures the corrosion of reinforcing steel, protected cathodically in concrete. The technique applies an incremental current step creating a small, transient potential response (< 30 mV). The resulting potential shift (ΔE) can then be used to calculate the interfacial resistance and capacitance, which are confirmed by using electrochemical impedance spectroscopy (EIS). The technique has been used to measure the electrochemical parameters for three cases: an electrochemical cell simulating steel encased in concrete, steel embedded in mortar and a prestressed concrete pipe.
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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