Electrochemical impedance spectroscopy (EIS) is used to evaluate the influence of a topcoat to impact corrosion protection after accelerated exposure testing (QUV, xenon arc, Prohesion). The ability to monitor early undercoat corrosion, at progressive stages of the accelerated weathering tests, was a major factor in selecting the EIS testing method. We compare various resin chemistries, typically used for high performance topcoats, for any contribution to the corrosion protection of the metal substrate. In this study, we compare commercially available two-component topcoat systems. This paper examines the performance of FEVE, polyurethane, and polysiloxane topcoat systems to provide additional corrosion protection for metal substrates.

Subject
Primers, Electrochemical impedance spectroscopy, Zinc rich coatings, Silicones, Vinyls, Top coats, Substrates, Impedance, Gloss, Polyurethanes, Corrosion protection, Electrolytes, Resins
© 2019 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).
2019
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.