Electrochemical impedance techniques have been utilized to study organic coatings on HY-80 steel in ASTM artificial ocean water. The coatings studied consisted of single coat primers similar to those utilized for anti-corrosion purposes in marine environments. Information was obtained concerning the rate of coating deterioration and steel corrosion behavior, as a function of exposure time, for the coating systems studied. Equivalent electrical analog circuit models aided in the analysis of the data obtained. Degradation of the coating and subsequent corrosion of the substrate were measured simultaneously with much greater accuracy than previously possible using conventional techniques. The techniques used are nondestructive in nature and have in-situ test capabilities.

Subject
Circuits, Films, Water, Coatings, Substrates, Corrosion rate, Diffusion, Impedance, Epoxy coatings, Polyamides, Corrosion resistance, Epoxies, Electrical resistance
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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