A new nitrided columbium-base alloy, Tribocor 532N, can provide significant economic benefits in a number of corrosive environments, especially those involving a combination of corrosive and erosive conditions.

The material is a surface nitrided Cb-30%-Ti-20%W alloy. It provides an outstanding combination of wear and abrasion resistance similar to that of cemented tungsten carbides along with superior resistance to corrosion in numerous severe chemical exposures. It is being used in valves for devices in oil well stimulation involving handling of hydrochloric and hydrofluoric acids at concentrations ranging up to 28% and temperatures to 350°F. Ball and seat components of this material have improved life by 8 to 10 times that of cemented carbide parts previously used. Crucibles of this material show negligible attack by molten uranium and its alloys. Such crucibles avoid the carbon contamination of the uranium previously experienced with graphite crucibles.

Steam injection components in titanium dioxide production have shown superior resistance to erosion in nozzle areas along with negligible corrosion as compared to the nickel-base alloy currently employed.

Subject
Costs, Materials, Corrosion resistant alloys, Valves, Nickel based alloys, Uranium, Stimulation, Graphite, Metals, Corrosion resistance, Steam, Titanium alloys, Alloys
© 1987 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).
1987
Association for Materials Protection and Performance (AMPP)
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