The electrochemical behaviour of sacrificial anode materials is of vital importance for the reliability and efficiency of cathodic protection systems for seawater exposed structures. As many sacrificial anode materials are proprietary alloys, many users require that anode manufacturers document the service performance and the quality level through laboratory testing. This type of testing has been carried out for nearly 15 years on behalf of both users and manufacturers. The paper describes the test methods applied and the reliability of these in reflecting the service performance of an Al-base sacrificial anode alloy. The relative importance of test parameters such as test duration and anodic current density is discussed.

Subject
Test methods, Materials, Galvanic anodes, Materials performance, Galvanic cathodes, Density, Corrosion products, Anode resistance, Current densities, Anodic current, Alloys, Test specimen, Anodes
Keywords:
cathodic protection, sacrificial anode, aluminium alloy, sea water testing, performance
© 1996 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).
1996
Association for Materials Protection and Performance (AMPP)
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