There is an increasing need in the petroleum industry to develop green products due to more severe environmental legislation. Recently, several environmentally friendly corrosion inhibitors became available commercially. We evaluated the performance of five of these commercial green corrosion inhibitors in CO2 saturated 3% sodium chloride solution with or without hydrocarbon. We used the Electrochemical Impedance Spectroscopy technique in the Rotating Cylinder Electrode system for the performance evaluation. Results showed that three of five commercial products gave acceptable inhibition performance and the performance ranking among these products also varied significantly in brines with or without 20% hydrocarbon. This indicates that partitioning characteristics of these products are different.

Subject
Circuits, Electrochemical impedance spectroscopy, Inhibitor performance, Corrosion rate, Sodium chloride, Sodium chloride solution, Corrosion modeling, Inhibition efficiency, Corrosion inhibitors, Brines, Linear polarization resistance, Polarization resistance, Hydrocarbons
Keywords:
Environmentally friendly corrosion inhibitors, CO2 corrosion, performance evaluation, partitioning, EIS, RCE
© 2002 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).
2002
Association for Materials Protection and Performance (AMPP)
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