Five types of organic coatings designated for atmospheric use and applied on carbon steel panels by personnel at the Naval Civil Engineering Laboratory (NCEL) have been subjected to full immersion in aerated ASTM sea water and evaluated for corrosion performance using electrochemical impedance spectroscopy (EIS). Rusting/blistering changes which occurred were also visually monitored and documented. Five samples of each type, removed periodically from the immersion tanks and evaluated under identical EIS conditions, are intended to develop a statistically acceptable EIS data base of coating performance. A sixth sample of each type was monitored for 30 days in an undisturbed environment to determine initial coating changes. The first year exposure data with respect to coating capacitance, coating impedance, pore and parent metal corrosion development, as well as visual degradation results are presented and discussed.

Subject
Primers, Electrochemical impedance spectroscopy, Zinc rich coatings, Water, Coatings, Electrochemical cells, Impedance, Pores, Capacitance, Epoxy coatings, Epoxies, Blistering, Samples
Keywords:
organic coatings, electrochemical testing, EIS, electrochemical impedance spectroscopy, immersion testing, non destructive testing, artificial sea water
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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