The majority of internal corrosion damages in hydrocarbon production systems are associated with sweet corrosion and the limited performance of carbon and low alloy steels (C-steels) to this type of corrosion threat. Whilst past efforts to studying CO2 corrosion have largely been in relation to addressing system chemistry/operating conditions, less attention has been directed at metallurgical parameters.

This paper focuses on both alloy chemistry and microstructure in addressing CO2 corrosion of C-steels. In this, a systematic analysis of corrosion damages combining operational and experimental data has been carried out in an attempt to elucidate influential steel properties that affect corrosion behavior. Steel performance has been characterized through determination of uncombined/free Cr and V and the influence of other alloying elements together with microstructural features. The results are exceptional and unique, pointing towards key variables influencing corrosion behavior of C-steels in CO2-containing fluids.

Subject
Piping, Carbides, Composition, Materials performance, Microstructure, Solid solutions, Alloying elements, Corrosion behavior, Film formation, Steel, Corrosion protection, Corrosion resistance, Elements
Keywords:
Alloying elements, CO2 corrosion, carbon and low alloy steels, free Cr and V, microstructure
© 2014 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).
2014
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.