Water soluble drag reducer chemicals have enabled significant increases in flow rates in many oilfield water injection systems. In some cases there is concern that this could leads to increased oxygen corrosion whenever the dissolved oxygen concentration strays above a typical injection target such as 20 ppb O2. The effect of a chemical drag reducer on oxygen corrosion of carbon steel was examined in a large scale flow loop simulating a sea water injection line. Drag reduction (up to 48%) matched corrosion reduction (up to 39%). This means that drag reducer has a self compensating effect on oxygen corrosion: it permits higher flow rates without increasing the oxygen corrosion rate.

Subject
Water, Degradation, Flow loop, Corrosion rate, Predicted corrosion rate, Constants, Shear, Water injection, Brines, Oxygen, Dissolved oxygen, Oxygen corrosion, Risk reduction
Keywords:
drag, corrosion, flow, oxygen, water injection
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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