In selecting materials for corrosive sour oil field environments, both age-hardened and cold-worked solid solution nickel-base alloys offer many advantages such as high-strength, toughness and excellent corrosion resistance. Alloy 028 (UNS N08028), alloy 825 (UNS N08825), alloy G-3 (UNS N06985), alloy 050 (UNS N06950) and alloy C-276 (UNS N10276) are among the primary solid solution high nickel CRA's currently used in the cold worked condition for OCTG's mechanical tubing in sour gas wells. A comparison of corrosion resistance of these nickel-base alloys for applications in severe sour service is presented. Many commercially significant alloys are ranked as to corrosion resistance up to 230°C (450°F) depending on the chloride concentration and H2S content.

Subject
Materials, Corrosion resistant alloys, Secondary cracks, Nickel based alloys, Molybdenum alloys, Sour environments, Cracking resistance, Oilfields, Corrosion resistance, Pitting resistance equivalent number, Alloys, Chlorides, Stress corrosion cracking
Keywords:
nickel-base alloys, sour environments, corrosion resistance, oil country tubular goods, age-hardened, tube, mechanical tube, oil field
© 2004 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).
2004
Association for Materials Protection and Performance (AMPP)
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