The applicability of AC Impedance Spectroscopy (ACIS) for detecting corrosion on rebar in concrete is explored theoretically. Corroding rebar is simulated as a one-dimensional electrical transmission line of twenty one-meter segments embedded in a uniform concrete matrix, with the corrosion being restricted to one segment. The simulations indicate that corrosion can only be detected at very low frequencies (<1mHz), but that the impedance and the peak voltage monitored at the concrete surface may be used to locate the site of the corrosive attack.

Subject
Water, Voltage, Rebar, Impedance, Concrete surfaces, Corrosion detection, Corrosion attacks, Transmission lines, Electrical resistivity, Corrosion modeling, Steel, Reinforced concrete, Concrete
© 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)
You do not currently have access to this content.