Four distinct purchase lots of indium activated, aluminum alloy, sacrificial anodes have been evaluated using the NACE Standard Test Method, TM0190-90. A comparison of the Faradaic efficiency values using the H2 evolution and weight loss methods showed quite reasonable agreement. The short-term (two week) laboratory test results agreed with the equivalent data from several samples in limited long-term testing up to 13 months in natural, full strength sea water. The test method itself is reviewed and testing problems and the rational for suggestions of minor changes to the Standard are also presented.

Subject
Activated aluminum, Test methods, Water, Materials, Electrochemical cells, Quality assurance, Anode surfaces, Current densities, Indium, Weight loss, Heat, Aluminum alloys, Anodes
Keywords:
Aluminum alloys, Sacrificial anodes, Cathodic protection, Indium activator, Test methods
© 1993 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).
1993
Association for Materials Protection and Performance (AMPP)
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