Corrosion inhibitors are commonly added to oil and gas production systems to control corrosion. In this research, flow loop tests conducted in a CO2 environment with sand examined the ability of an inhibitor to provide protection for a carbon steel elbow in 4.6 m/sec liquid flows with entrained sand particles in high sand concentrations. Both iron carbonate scale-forming conditions and non-scale-forming conditions were examined. The inhibitor maintained good corrosion protection for all non-scale-forming tests in which an inhibitor concentration of at least 100 ppm was used. In scale-forming tests with sand, the inhibitor appeared to prevent localized corrosion that had been observed at sand impingement points in the elbow in tests without inhibitor, although some degradation in protection was observed over extended periods of time.

Subject
Sand, Corrosion rate, Metal surfaces, Scale inhibitors, Protective scales, Metal loss, Corrosion scales, Scale formation, Corrosion inhibitors, Corrosion protection, Localized corrosion, Erosion corrosion, Linear polarization resistance
Keywords:
corrosion, erosion, erosion-corrosion, inhibitor, carbon dioxide, sand, iron carbonate, scale, localized corrosion
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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