The test methods for laboratory evaluation of paint coatings are used despite well known problems of interpretation of data and lack of correlation with practical experience. Our laboratory is trying to develop a test method based on electrochemical impedance, to be used as a method for the routine evaluation of commercial quality protective coatings. Important impedance parameters included the low-frequency impedance magnitude, coating resistance, and breakpoint frequency.

Subject
Primers, Electrochemical impedance spectroscopy, Protective coatings, Coatings, Materials, Vinyls, Cathodic protection, Impedance, Capacitance, Epoxy coatings, Potable water, Paints, Electrolytes
Keywords:
Potable water, anticorrosive coatings, corrosion, vinyl coatings, electrochemical impedance, capacitance, high frequency
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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