Corrosion monitoring in oil field operations and process streams can be accomplished in different ways with varying success. Corrosion coupons, resistance probes, instantaneous corrosion rate meters, galvanic probes, iron counts, equipment failures, and equipment replacement records can be used to monitor corrosion. The last two methods are very costly and possibly unsafe, while iron counts can only be used in certain clean systems and get more attention than they deserve. Instantaneous corrosion rate probes are used in aqueous systems or in high water cut production systems with sufficient conductivity. In gas or crude oil systems, these corrosion rate meters cannot be used. The corrosion coupon, whether a preweighed pony rod or pipe nipple or a true coupon inserted at a tee in the line, may be rather simple and unsophisticated, but it is one of the most reliable and foolproof methods for obtaining data on the average corrosion rate in a system, The degree of success in using a coupon or any other probe to determine the corrosivity of a particular system depends on the type of system being monitored (oil, gas, water, paraffinic, scaling, etc) and the location of the coupon.

Subject
Electric current, Corrosion rate, Probes, Walls, Oil wells, Current densities, Fingers, Corrosion inhibitors, Corrosion data, Corrosion probes, Corrosion coupons, Hydrogen, Oil
© 1977 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).
1977
Association for Materials Protection and Performance (AMPP)
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