Electrochemical Impedance Spectroscopy (EIS) was used to evaluate the performance of two doped polyanilines, PAN, in the emeraldine base form, EB, as protective coatings for carbon steel under immersion in 3.55% NaCl. Coatings A and B consisted of EB doped with tetracyanoethylene (TCNE) and with p-toluenesulfonic acid (PTSA) respectively. The equivalent circuit Re(Cc [Rc(QRa)]) provided a satisfactory fit for the EIS data.

Subject
Circuits, Electrochemical impedance spectroscopy, Protective coatings, Coatings, Materials, Sodium chloride, Impedance, Nyquist plots, Polymers, Steel, Immersion, Corrosion protection, Corrosion potential
Keywords:
electrochemical impedance spectroscopy, coatings, conductive polymers, polyaniline, corrosion, sodium chloride, steel
© 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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