The combination of localized turbulence, increased flow rate and crevice effects at partial blockages in condenser tubes is responsible for a significant number of tube failures in service, particularly in seawater. Few data are available on this form of erosion-corrosion. This paper presents the results of controlled tests on tubes of copper alloys C70600, 71500, 71640 and 72200 utilizing artificial blockages and flowing natural seawater. In general, alloy C72200 exhibited performance significantly superior to that of the other alloys. Pitting unrelated to the presence of blockages, was observed in tubes of alloys C72200 and C71640 after twelve months of service.

Subject
Pits, Water, Tubes, Flow velocity, Oxide films, Corrosion products, Crevices, Corrosion attacks, Crevice corrosion, Pitting, Copper, Erosion corrosion, Alloys
© 1982 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).
1982
Association for Materials Protection and Performance (AMPP)
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