The development and production of low carbon Cr-containing steels with superior resistance to CO2 corrosion for downhole production applications is presented in this paper. It covers the outcome of an extensive and systematic development programme focusing on metallurgical conditioning and micro-alloying additions to substantially improve CO2 corrosion behaviour whilst ensuring a degree of tolerance to H2S corrosion. The paper presents details of alloy compositions, mechanical treatments and extensive corrosion evaluation of both laboratory and industrially produced steels. The outcome is a major development and influential in the provision of steels with superior corrosion resistance for downhole production applications whilst ensuring economy.

Subject
Composition, Flow loop, Corrosion rate, Sodium chloride, Mechanical properties, Steel, Corrosion data, Carbon steel, Carbon, Corrosion resistance, Elements, Sulfide stress cracking, Linear polarization resistance
Keywords:
Carbon and Low Alloy Steels, CO2 Corrosion, Downhole, H2S Corrosion, Metallurgical Conditioning, Microalloying Elements, Oilfield Applications
© 2003 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).
2003
Association for Materials Protection and Performance (AMPP)
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