Corrosion of steel in concrete is typically studied in uncracked concrete. Field concretes, however, often have cracks that extend down to the reinforcing steel. In this paper electrochemical corrosion testing in cracked concrete of two qualities is performed and compared to the physical examination of the embedded reinforcement. The resistance to corrosion is significantly improved as the concrete properties and reinforcement cover approach that recommended in ACI 318. Calcium nitrite (DCI Corrosion Inhibitor1) additions to the concrete significantly reduce corrosion. The results indicate that testing in cracked concrete should be conducted in concrete that is representative of that specified in ACI 318.

Subject
Test methods, Corrosion currents, Corrosion rate, Rebar, Corrosion cracking, Corrosion products, Calcium nitrite, Macrocell current, Steel, Corrosion resistance, Chlorides, Polarization resistance, Concrete
Keywords:
corrosion, reinforcing bar corrosion, concrete, corrosion inhibitors, calcium nitrite, concrete cracking, macrocell corrosion, polarization resistance
© 1993 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).
1993
Association for Materials Protection and Performance (AMPP)
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