The efficiency of corrosion inhibitors is affected by environmental and metallurgical factors, such as temperature, CO2 pressure, flow conditions, solution pH, metal composition, etc. A flow through corrosion test rig was developed, that can generate reliable data on inhibitor performance in high pressure CO2 systems. The use of a flow through system avoids problems resulting from changes in the pH and concentration of dissolved species in solution, and the precipitation of a crystalline, highly protective FeCO3 scale from a saturated solution. The test procedure involves pre-corroding the specimens before inhibitor addition, since inhibitor performance is negatively affected by the presence of a corrosion product scale. Results obtained using this new procedure are in good agreement with field experience.

Subject
Inhibitor performance, Cylinders, Corrosion rate, Protective scales, Iron, Dissolved iron, Corrosion scales, Pressure, Scale formation, Corrosion inhibitors, Steel, Brines, Corrosion protection
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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