Traditionally, a zinc-rich primer, epoxy midcoat and polyurethane topcoat have been the standard 3-coat solvent borne system used for coating structural steel, such as in the maintenance of bridges. This study describes the performance of waterborne acrylic coating systems in an accelerated testing protocol including corrosion resistance and cyclic weathering. A comparison of systems based solely on waterborne acrylic coatings, as well as hybrid systems (e.g., zinc rich primer with waterborne topcoats), to the industry standard will be discussed.

Subject
Volatile organic compounds, Test methods, Primers, Coating performance, Zinc rich coatings, Top coats, Zinc-rich primers, Salt spray corrosion testing, Rust, Epoxies, Blistering, Coating systems, Acrylics
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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