Galvanic cathodic protection systems are increasingly used to protect reinforced concrete structures especially marine bridge structures. Various different types of zinc anodes have been used. In this study an effort was made to document the long-term field performance of five galvanic cathodic protection systems installed on four marine structures and one structure exposed to deicing salts. The cathodic protection systems evaluated in this study utilized arc-sprayed zinc, zinc foil with adhesive, and zinc mesh with compression panels. At the end of the study the age of the systems varied from thirteen months to seven years. As the ability of the cathodic protection system to stop corrosion is well established, the focus of this effort was to ascertain the effectiveness of each anode material and configuration to serve as a cathodic protection anode on reinforced concrete structures. This paper documents the findings of this study.

Subject
Depolarization, Steel structures, Test methods, Cathodic protection, Probes, Rebar, Zinc anodes, Concrete surfaces, Piles, Zinc, Bridges, Concentration cells, Anodes
Keywords:
Cathodic Protection, Marine Pilings, Corrosion of Reinforced Concrete Structures, Arc Sprayed Zinc
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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