The basic equations relevant to the operation of the vibrating probe technique have been presented. The role of the probe height above the surface as it affects the determination of the current densities at the metal surface, the resolution of the anodic or cathodic areas, and the amplitude of the probe vibration have been analyzed and discussed. The analysis incorporates the lock-in amplifier operation in determining the effects of nonuniform fields on the observation for a point current source. The approaches have been applied to the corrosion behavior of iron in a dilute chloride and sulfate solution.

Subject
Electric current, Corrosion rate, Metal surfaces, Probes, Cathodic current, Iron, Anode surfaces, Current densities, Anodic current, Vibration, Oxygen, Electrodes, Corrosion potential
© 1989 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).
1989
Association for Materials Protection and Performance (AMPP)
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