A procedure for rapid and reproducible screening and comparative evaluation of the film persistence of commercial adsorption-type corrosion inhibitors has been developed. The corrosion potential measurement was demonstrated to be a useful tool in indicating the progressive change of inhibitor film persistence in flowing environments. For this work, the film persistance of downhole corrosion inhibitors was evaluated under simulated oil well conditions found in the Western Operating Area (WQA) of Prudhoe Bay. Flow velocity was found to be a primary parameter controlling the film persistence, followed by carbon dioxide (CO2) partial pressure. The film persistence was nearly independent of temperature effects below 93°C. Therefore, simulation of production fluid hydrodynamics was a prerequisite for screening and determining inhibitor film persistence in the laboratory.

Subject
Films, Inhibitor performance, Inhibitor films, Flow velocity, Film persistency, Partial pressures, Fluids, Corrosion inhibitors, Produced water, Steel, Corrosion monitoring, Corrosion potential, Test specimen
© 1988 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).
1988
Association for Materials Protection and Performance (AMPP)
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