Preliminary studies have been performed aimed at the application of EIS techniques to the monitoring of coating integrity in buried pipelines. Electrochemical techniques are promising for the investigation of coating condition in large components, since they are non destructive and little perturbative. On the other hand, the selection of accurate models is of importance for data reduction and for the understanding of the obtained results. In literature, experimental studies and models are available for application to the case of rebar embedded in concrete. The present work was aimed at designing an experimental program to apply electrochemical techniques to large buried pipelines, using the cathodic protection system as a tool for obtaining impedance spectra

Subject
Circuits, Test methods, Electrochemical impedance spectroscopy, Piping, Modeling, Cathodic protection, Impedance, Pipelines, Interfaces, Defects, Below ground pipelines, Coating defects, Soil
Keywords:
Buried pipelines, Coating defect, Coating disbonding, Electrochemical Impedance Measurements, Resistance, Coating Integrity Monitoring
© 1998 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).
1998
Association for Materials Protection and Performance (AMPP)
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