It is a specific feature of the corrosion phenomena in the petroleum industry that it occurs in a two-phase medium (water and hydrocarbon). It can easily be shown that the rigorous elimination of water reduces corrosion rates to an almost negligible level; it does not, however, follow that water soluble inhibitors are the most efficient. To the contrary, oil soluble inhibitors are found to be much more active. While the latter show activity in the low ppm range, the water soluble inhibitors are almost always used from 100 ppm on up, generally between 1,000 - 10,000 ppm. As a consequence, oil soluble corrosion inhibitors, such as used in the petroleum industry, must necessarily be evaluated in a two-phase system. This has a number of consequences which will be discussed in various contexts throughout this paper.

Subject
Hydrogen sulfide, Water, Corrosion rate, Metal surfaces, Iron sulfides, Constants, Corrosion inhibitors, Steel, Brines, Corrosion probes, Oxygen, Corrosion protection, Electrical resistance probes
© 1974 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).
1974
Association for Materials Protection and Performance (AMPP)
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