The corrosion resistance of martensitic stainless steel at a high CO2 and simulated acidizing condition was studied. Modified 13Cr steels and new 15Cr steel show good corrosion resistance at the very high CO2 environment of 160°C and 50 MPa CO2. Martensitic stainless steels showed high corrosion rate in the live acid condition, but those corrosion rates were lower than 22Cr duplex stainless steel. No localized corrosion was observed in martensitic stainless steels, but selective dissolution was observed between austenite and ferrite in 22Cr duplex stainless steels. The corrosion rate of new 15Cr in the spent acid condition was the lowest in these steels. The martensitic stainless steels showed better corrosion resistance than 22Cr duplex stainless steel in the inhibitor containing conditions. New 15Cr showed good corrosion resistance in the high CO2 environment and acidizing condition.

Subject
Acids, Films, Steel surfaces, Materials, Corrosion rate, Corrosion testing, Partial pressures, Steel pipes, Steel, Corrosion resistance, Duplex stainless steel, Austenite, Martensitic steel
Keywords:
martensitic stainless steel, Chromium, Nickel, Molybdenum seamless pipe, OCTG, carbon dioxide corrosion, high temperature, acidizing
© 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)
You do not currently have access to this content.