There are a variety of electrochemical (EC) tests that have been published for characterizing aluminum alloy materials for sacrificial anode applications. This paper expands on a previously disclosed 20 hour QA/QC test method. New data are presented regarding the effects of type, concentration and pH of the test electrolyte, the extent of the influence of the freshly formed oxide film as well as the surface roughness on the EC test results. Evidence of the mal-distribution of the alloy chemistry is also presented and discussed.

Subject
Test methods, Materials, Metal surfaces, Sodium chloride, Roughness, Anode surfaces, Acidity, Oxide surfaces, Aluminum alloys, Alloys, Steel grit, Electrolytes, Anodes
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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