This work attempts to assess the possibility of using reciprocal frequency (1/f) electrochemical noise as a monitoring technique in the performance of sacrificial anodes used in cathodic protection systems. Electrochemical noise data measured as the fluctuations of the anode potential was obtained for zinc sacrificial anodes immersed in artificial sea water. Good correlation was found between the galvanic current and the standard deviation of the potential fluctuations. The spectra obtained appeared to characterise the type of attack for the sacrificial anode in laboratory conditions. Preliminary results for an aluminum alloy (Al-Zn-In) were obtained in the field and are also presented.

Subject
Water, Galvanic anodes, Anode potential, Cathodic protection, Electrochemical noise, Slopes, Deviation, Density, Electric potential, Immersion, Galvanic current, Electrode potential, Sampling
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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