Resistance of a new 13Cr martensitic stainless steel (0.025C-13Cr-4Ni-lMo) to CO2 corrosion and to SSC was investigated and the application limit in oil and gas environments was clarified. The new 13Cr steel had a better CO2 corrosion resistance than the conventional 13Cr (0.2C-13Cr) due to Ni addition. The new 13Cr steel can be used at a CO2 pressure of up to 5MPa at 150°C, compared with that of only below 0.5MPa for the conventional 13Cr. The new 13Cr steel had also better SSC resistance. The new 13Cr steel did not crack in the U-bend test in the 5%NaCl solution saturated with 0.003MPa H2S at 50°C, while the conventional 13Cr steel cracked. This is attributed to the decrease in dissolved hydrogen though the reduction of hydrogen production and penetration due to Ni addition.

Subject
Tubular goods, Materials, Hydrogen permeation, Corrosion rate, Dissolved hydrogen, Stress cracking, Corrosion products, U bends, Penetration, Steel, Corrosion resistance, Sulfide stress cracking, Hydrogen
Keywords:
martensitic stainless steel, seamless pipe, OCTG, carbon dioxide corrosion, sulfide stress cracking
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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