Duplex coatings are used to protect galvanizing in harsh environments, provide aesthetics, and enhance corrosion protection. Surface preparation is critical to achieving long term performance, and abrasive blasting was found to be the most effective surface preparation technique. Epoxy/polyurethane coatings are commonly used as duplex coatings in highly corrosive environments, and these coatings were benchmarked against high-build polyaspartic coatings. Polyaspartic coatings were found to perform as well as epoxy/polyurethane coatings in cyclic prohesion and wet adhesion evaluations over blasted hot-dipped galvanizing substrates.

Subject
Abrasive blasting, Test methods, Zinc rich coatings, Prohesion, Wet adhesion, Galvanized coatings, Epoxy coatings, Polyurethane coatings, Salt spray corrosion testing, Corrosion protection, Surface profile, Zinc, Urethane
© 2015 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).
2015
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.