The effect of corrosion inhibitor injection has been monitored in selected flowlines topside on an offshore platform. The monitoring was done by different electrochemical methods in parallel. New clean probes were installed and the corrosion rates were measured before and after start of inhibitor injection. The reduction and the corrosion rate on these clean probes varied between 0-98% in the flowlines from the different wells. The piping geometry, oil and water composition and the materials are very similar. Two commercial inhibitors were tested. One of the products worked well at 1.5 m/s, but failed to work at total average velocities above 4.4 m/s.The other product worked at 4.0 m/s, but give a lower protection than the first product.

Subject
Electrochemical impedance spectroscopy, Water, Materials, Piping, Corrosion rate, Probes, Stress, Shear, Corrosion inhibitors, Risk reduction, Elements, Linear polarization resistance, Oil
© 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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