A thin layer of semi-conductive material was developed and combined with MMO coated titanium tape anodes for reinforced concrete structures. This system was developed to overcome the problems experienced with existing cathodic protection systems. These problems include poor CP current distribution caused by near-short circuits and shallow concrete cover, acid generation at the anode-concrete interface and dryness of the anode-concrete interface for structures which are not exposed to direct moisture such as tunnels or deck soffit and substructures. In addition, by eliminating complex CP anode engineering and installation, the CP system becomes more users friendly and cost effective for many structure owners and contractors.

This paper discusses the problems with existing CP systems and describes an innovative state-of-the art impressed current CP system. Data obtained from the laboratory and the field trials will be presented.

Subject
Ribbons, Circuits, Steel structures, Anode systems, Tape, Rebar, Installation, Grout, Meshes, Current distribution, Titanium, Concrete, Anodes
Keywords:
impressed current cathodic protection, Conducrete, MMO titanium tape anode, concrete, rebar corrosion, concrete structures
© 2014 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).
2014
Association for Materials Protection and Performance (AMPP)
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