Cathodic protection (CP) of rebars in concrete structures has become a widely used method to stop corrosion. Efforts have been concentrated on the use of systems applied onto or into the concrete surface. This paper discusses the use of internal anodes, mounted in drilled holes, offering advantages such as: No additional weight, Independence of surface condition, Reduced problems with short circuits, Short installation time, Ultimate options for monitoring - and comparatively low cost.

The method requires use of very high current densities. This and the current distribution will be discussed, and some projects executed with CP by internal anodes will be presented.

Subject
Acids, Costs, Anodic protection, Cathodic protection, Acid attack, Structures, Installation, Anode surfaces, Slabs, Current densities, Construction, Concrete, Anodes
Keywords:
Corrosion, Concrete Reinforcement, Hot Spot, Anodes, Internal, Current density, Current distribution, Interface, Acidification
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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