Stainless steels can be considered as good candidates for use in H2S-CO2 containing gas fields provided that their limits of use are accurately known. As the main problem for these materials is the resistance to stress corrosion cracking, laboratory tests were conducted on various stainless steels either austenitics or duplexes in NACE TM 01-77 solution as well as in simulating field environments.

The combination of Constant Load and Slow Strain Rate tests results permitted stating conservative limiting environmental conditions for SCC expressed as PH2S and temperature values. Moreover, the resistance of the steels appeared to be mainly dependent on their chemical composition by considering chromium, molybdenum and nitrogen additions (PREN).

Subject
Hydrogen sulfide, Materials, Passive films, Partial pressures, Sodium chloride solution, Solutions, Nitrogen, Pitting, Corrosion resistance, Stainless steel, Pitting resistance equivalent number, Stress corrosion cracking, Rest potential
Keywords:
oil & gas, sour gas, localized corrosion, stress corrosion cracking, duplex stainless steel, super-austenitic stainless steel, nitrogen, alloying elements
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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