Development work on the field application of the polarization resistance technique for determining the rate of corrosion of reinforcing steel in concrete has proceeded under a contract to the Federal Highway Administration. The feasibility of this technique using a computer driven system developed by the NBS was demonstrated in field trials on three bridges as described in NBS Publication NBSIR 86-34561. This paper describes recent development work to make the equipment more rugged for field use and simpler to operate and understand. This paper also provides information on additional field trials and laboratory correlation of the results which provide corrosion currents in micro-amps as well as instantaneous corrosion rate in mils per year.

Subject
Test methods, Voltage, Corrosion currents, Corrosion rate, Rebar, Instrumentation, Open circuits, Weight loss, Equipment, Polarization resistance, Tafel slope, Concrete, Electrode potential
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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