This paper presents the experimental results for CO2 corrosion of carbon steel in a 101.6 mm ID multiphase flow loop using electrochemical noise measurement. ZRA mode electrochemical noise technique with three nominally identical electrodes was utilized to study the corrosion processes and inhibitor performance in the stationary slug flow. Comparable corrosion rates were obtained from EN, EIS, and ER tests, suggesting EN technique with a “noisy” RE a practical measurement for investigating CO2 corrosion in multiphase slug flow condition. Results from EN signals showed that addition of 100 ppm inhibitor could retard the corrosion process to a satisfied level for stationary slug flow pattern at Fr 6 in the flow loop tests.

Subject
Working electrodes, Electrochemical impedance spectroscopy, Steel surfaces, Water, Voltage, Corrosion rate, Electrochemical noise, Slug flow, Electrochemical current, Corrosion inhibitors, Galvanic current, Electrodes, Sampling
Keywords:
ZRA mode, multiphase, flow loop, slug flow, electrochemical noise (EN), noisy RE
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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