Impressed current cathodic protection (ICCP) has been proven to effectively control corrosion of reinforcing steel in concrete. But very little long-term data have been presented regarding the effectiveness of ICCP for extending the service life of concrete bridge repair. This paper presents results of testing of ICCP systems on three bridges in Ohio 23 years, 20 years, and 16 years after installation. Even after this time, the systems were functioning as intended. Comparison of protected areas to unprotected areas provided conclusive evidence of the prevention of damage due to corrosion.

Subject
Electric current, Voltage, Impressed current cathodic protection, Reference electrodes, Steel, Corrosion protection, Surveys, Bridges, Polarization, Chlorides, Concrete, Electrode potential, Anodes
Keywords:
anode, cathodic protection, concrete, concrete repair, reinforcing steel, corrosion
© 2012 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).
2012
Association for Materials Protection and Performance (AMPP)
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