Electromagnetic (em) techniques are well proven and accepted for subsurface exploration to locate mineral deposits and aquifers as well as for defining the depth of permafrost in the north. Over the past 4 years the use of this technique has been investigated as an aid to optimizing cathodic protection groundbed location and for pre-predicting groundbed resistance.

This paper outlines the equipment and procedures used in measuring and interpreting subsurface conductivity values for use in the design of deep and shallow groundbed systems.

Examples are given showing the methods of interpretation used and the correlations obtained between actual and predicted resistance levels for deep vertical beds to 90 m depth and for shallow vertical and horizontal beds.

Subject
Coils, Test methods, Correlation, Groundbeds, Soil resistivity, Anode surfaces, Instrumentation, Anode resistance, Electrical resistivity, Surveys, Soil, Conductivity, Anodes
© 1987 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).
1987
Association for Materials Protection and Performance (AMPP)
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