A modern high strength ternary alloy containing 15Ni-8Sn-Cu has been developed and delivers new combinations of high strength and corrosion resistance. This alloy is in commercial use in aggressive tribological environments and has exhibited excellent performance characteristics. Prior work demonstrated excellent seawater corrosion resistance and reasonable corrosion resistance in NACE Levels I, III and V solutions. The alloy also exhibited SCC resistance in similar solutions. This paper documents the basic SCC and corrosion rate behavior of a new 150 ksi yield strength TS temper in Levels I, II, IV, V and VII environments. Microstructural observations, corrosion rate and resistance to SCC in full immersion proof ring static tensile tests are reported.

Subject
Environmental cracking, Test methods, Marine environments, Materials, Intergranular stress corrosion cracking, Composition, Corrosion rate, Rods, Copper alloys, Corrosion resistance, Fracture, Yield strength, Stress corrosion cracking
Keywords:
copper alloy, C72900, sour, corrosion, SCC
© 2007 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).
2007
Association for Materials Protection and Performance (AMPP)
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