An L-80 grade, 15% Cr martensitic stainless steel has been developed for CO2 containing gas wells as a partial substitute for 22% Cr duplex stainless steels. In this study, environmental limitations of the developed steel are discussed from the viewpoints of general corrosion, pitting corrosion, SSCC and SCC resistance. The developed steel shows excellent corrosion resistance in the conditions of several percent NaCI solution within PH2S = 0.1 atm., at temperatures below 200°C, and shows higher CO2 corrosion resistance, a little higher pitting corrosion resistance and similar SSCC and SCC resistance compared to Type 420.

Subject
Hydrogen sulfide, Immersion tests, Corrosion rate, Precipitates, Partial pressures, Tubing, Mechanical failure, Steel, Pitting, Corrosion resistance, Duplex stainless steel, Stress corrosion cracking, Types of corrosion
Keywords:
15% Cr stainless steel, Oil country tubular goods, CO2 corrosion resistance, Pitting corrosion resistance, Type 420, Duplex stainless steel, Toughness, SCC, SSCC, Cost performance
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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