Corrosion control is a critical element in the successful operation of the Prudhoe Bay Field. The field contains about 70 large (16 to 24 inch) diameter multiphase gathering lines These lines can be up to five miles long and cross environmentally sensitive areas. Continuous application of corrosion inhibitor is used to control corrosion in the low alloy carbon steel lines.

To improve the corrosion inhibition program we conducted laboratory testing of candidate inhibitors and compared them to the incumbent products currently in field use. The three techniques we used were stirred kettle tests, rotating cylinder electrode (RCE) tests, and a high speed flow loop.

There were a number of products which performed well in the stirred kettle tests. However, under high shear stress conditions there were fewer effective products. The results from the RCE test and the flow loop are comparable under similar shear stress conditions. Based on the test results we were able to recommend a candidate for field testing.

Subject
Test methods, Water, Inhibitor performance, Flow loop, Corrosion rate, Pipelines, Dosages, Corrosion products, Stress, Shear, Fluids, Corrosion inhibitors, Brines
Keywords:
carbon dioxide, multiphase flow, corrosion inhibitors, laboratory testing
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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