Nickel-aluminum bronzes are metallurgically complex alloys. Small variations in composition can result in markedly different microstructures. In a previous study, the microstructures of selected alloy compositions were characterized and correlated with seawater corrosion resistance. The present study discusses the results from seawater jet impingement tests conducted on these same alloy compositions.

Specimens prepared from two different experimental heats of nickel-aluminum bronze were subjected to various heat treatments prior to jet impingement testing in seawater. As-cast commercial nickel-aluminum bronze was also tested, as an experimental control. Both experimental heats and the experimental control are in compliance with UNS C95800 and MIL-B-24480, except that one of the experimental heats, at 8.1% Al, was intentionally melted to be below the lower limit of the specified aluminum compositional range of 8.5 to 9.5%. The microstructures of both experimental compositions were characterized and compared with seawater jet impingement test results.

Subject
Test methods, Composition, Microstructure, Impingement, Mass loss, Seawater, Corrosion attacks, Jet impingement, Aluminum alloys, Alloys, Heat treatment, Cleaning, Oil
Keywords:
Aluminum Bronze, Nickel-Aluminum Bronze, Seawater, Microstructure, Martensite, Bainite, Eutectoid, Alpha, Widmanstatten, Phase
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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