In case it is inconvenient to interrupt power supply or there exists stray current, the cathodic protection test probe can be applied to evaluate the efficiency of the cathodic protection system. The measurement accuracy of the test probe largely depends on its structure, and is studied extensively in this work, including the porous tip’s porosity and aperture, the coupons’ geometry and distance, as well as the type of the built-in reference electrode and electrolyte. Both laboratory experiments and field tests are carried out, showing that the designed cathodic protection test probe performs well in measuring the polarized potential and the native potential.

Subject
CP coupons, Materials, Piping, Probes, Reference electrodes, Penetration, Stray current, Corrosion probes, Corrosion coupons, Polarization, Corrosion potential, Electrolytes, Electrode potential
Keywords:
cathodic protection, test probe, coupon, built-in reference, electrolyte
© 2012 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).
2012
Association for Materials Protection and Performance (AMPP)
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