Cathodic Protection is accepted to be an effective method for corrosion prevention of reinforcing structures such as bridge decks and off-shore pipelines. Operation of a system on bridge deck requires reference electrodes to be embedded in concrete. These electrodes are used to monitor the steel potential for control of the impressed currents.

The characteristics of embeddable reference electrodes suitable for use in portland cement concrete are reviewed. Two years experience with molybdenum-molybdenum oxide electrodes in the laboratory and in a bridge decks are reported. The results of this study indicate that the potential of this electrode in concrete with respect to time remains stable and the variation of potential from one electrode to another is small.

The mercury-mercury oxide electrode has been used in alkaline solutions, and the record of its performance in these environments has shown to be a good electrode. The possibility of using mercury-mercury oxide electrodes in concrete are given.

Subject
Steel structures, Materials, Cathodic protection, Oxides, Reference electrodes, Metal oxides, Portland cement, Constants, Steel, Bridges, Electrodes, Concrete, Electrode potential
© 1981 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).
1981
Association for Materials Protection and Performance (AMPP)
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