A rotating cylinder electrode was used to generate shear stresses representative of the shear stresses as may be encountered in pipelines and downhole production. Linear polarization measured the corrosion rates of the 1018 steel electrode in a solution made of NACE solution mixed with treated kerosene and purged with carbon dioxide. The tests were run both with and without commercial corrosion inhibitors provided by the 19 oil and gas companies which made up the industrial consortium. The pipeline inhibitors were run at 30°C while the downhole inhibitors were run at 70°C.

As expected, as the shear stresses increased, a drop in the effectiveness of protection was measured. The solubility characteristics of the CO2 inhibitors seemed to play a role in their effectiveness.

Subject
Water, Cylinders, Corrosion rate, Turbulent flow, Kerosene, Pipelines, Solubility, Linear polarization, Stress, Shear, Fluids, Corrosion inhibitors, Electrodes
Keywords:
inhibitors, high velocity, shear stress, rotating electrode
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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