The Rp determinacion has been widely used by the authors to measure the corrosion rate of steel bars embedded in concrete in many different situations. The A.C. impedance measures are now being starting used within the same system.

In the present paper some theoretical bases on the accuracy and limits of both types of techniques are presented. The use of potentiostatic regulation in linear polarization is justified. A comparison of both techniques applied to the measuring of corrosion of steel reinforcements embedded in concrete with their respective advantages and disavantages is discussed, concluding that, at present, the RD method is more accurate than A.C. impedance in determining the corrosion rate of steel in concrete, although the A.C. impedance may be useful for knowing the type of control of the corrosion process and the morphology of the attack.

Subject
Circuits, Materials, Voltage, Corrosion rate, Impedance, Electrolyte resistance, Mortar, Linear polarization, Constants, Steel, Polarization, Concrete, Reinforcement
© 1985 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).
1985
Association for Materials Protection and Performance (AMPP)
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