Increasing attention has been focused in recent years upon development of sacrificial anode cathodic protection systems for corrosion control of steel in atmospherically exposed concrete. While effectiveness of this type of cathodic protection can be assessed by depolarization testing and perhaps other techniques, no method presently exists for analytically characterizing the relative influence of various system and cell parameters. Of particular interest is the electrochemical behavior of the anode, since its characteristics are generally rate controlling. In view of this, a procedure has been developed in terms of relevant electrochemical terms which permits cathodic polarization of embedded steel in concrete to be quantitatively characterized and for the role of different system variables to be identified. Utility of the method is demonstrated in terms of reported data from laboratory tests and from field structures.

Subject
Cathodes, Sand, Cathodic potential, Zinc anodes, Cathodic current, Density, Anode resistance, Current densities, Electrical resistivity, Anodic current, Steel, Concrete, Anodes
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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