The control of internal corrosion of carbon steel structures is a critical element of asset integrity management program in oil and gas production facilities. The selection of a corrosion inhibitor for field deployment is typically based on laboratory screening tests, followed by field trials. This paper describes some of the experience gained in using new localized corrosion monitoring (LCM) technique in laboratory beaker and flow loop tests to differentiate the capability of corrosion inhibitors in controlling localized corrosion. A new data analysis program was employed to identify the occurrence of localized events in terms of magnitude, duration and distribution. This information is used to assess severity and time and spatial distribution of localized corrosion activities. Good correlation with post exposure metallographic examination of the test electrodes was obtained. Examples of monitoring localized corrosion processes including mild steel and stainless steel in various environments are also presented.

Subject
Pits, Electric current, Corrosion rate, Repassivation potentials, Corrosion initiation, Sodium chloride solution, Corrosion inhibitors, Pitting, Carbon steel, Localized corrosion, Stainless steel, Electrodes, Electrode potential
Keywords:
localized corrosion, monitoring, corrosion inhibitors
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
You do not currently have access to this content.