100% solids, aromatic or aliphatic, rigid polyurethane coating technology has become one of the main technologies that provides long-term corrosion protection of steel utility poles in North America for underground or aboveground applications. This paper outlines the corrosion mechanisms of these applications and highlights the challenges of the use of these coatings on galvanized surfaces of both embedded portions and aboveground portions of today’s steel utility poles. The paper reviews the basic chemistries and the development of the 100% solids, aromatic and aliphatic, rigid polyurethane coating technology for the steel utility pole industry as well as how these advanced coatings meet the application challenges in terms of design and fabrication, surface preparation, application, performance and quality inspection. Several new developments are also discussed.

Subject
Zinc rich coatings, Coating application, Steel surfaces, Solids, Galvanized coatings, Polyurethanes, Oxide surfaces, Galvanized steel, Coating adhesion, Polyurethane coatings, Steel, Corrosion protection, Zinc
© 2003 Association for Materials Protection and Performance (AMPP). All rights reserved. This work is protected by both domestic and international copyright laws. 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).
2003
Association for Materials Protection and Performance (AMPP)
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