Galvanization of reinforcing steel bars is one of the techniques used to inhibit corrosion of reinforcing steel used in concrete. Hot-dip galvanized reinforcing steel bars were used in concrete bridge decks subjected to deicer salts to inhibit chloride-induced corrosion and increase the service life of concrete bridges. In this paper, procedures used to evaluate concrete bridge decks reinforced with galvanized steel were described. Relationships between water-soluble chloride concentrations in concrete and performance of the galvanized coating were evaluated. Evaluation test results of two bridges in the states of Michigan and Wyoming are presented in this paper. Results of this study revealed that the galvanized reinforcing steel showed little evidence of corrosion in these two concrete decks. Observations during the field investigation indicated no evidence of concrete deterioration attributable to corrosion of embedded steel reinforcement after more than thirty years of service.

Subject
Steel reinforcement, Steel surfaces, Rebar, Galvanized coatings, Inspection, Coating thickness, Steel, Electric potential, Surveys, Zinc, Bridges, Chlorides, Concrete
Keywords:
Galvanized Bars, Concrete, Coating, Corrosion, Bridge Deck, Chlorides, Electrical Potentials Metallographic_measurement
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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