The sweet corrosion behavior of L-80 grade downhole tubular was investigated in flowing two-phase oil-brine fluids. Depending upon percent water cut, two different phases appeared to exist: a water continuous phase above 50% water cut and an oil continuous phase below 50% water cut. In the oil continuous phase, the presence of local turbulence and the staying time of water droplets on the steel surface were the overriding factors determining the severity of the corrosion. The corrosion in the water continuous phase was predominantly controlled by flow character and temperature. Based on this observation, a corrosion mechanism is proposed and discussed in this paper.

Subject
Pits, Water depth, Water, Metal surfaces, Iron carbonate films, Flow velocity, Penetration, Fluids, Steel, Brines, Crude, Pitting, Oil
© 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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