Understanding the corrosion mechanisms prevailing in wet sour gas is the key step in monitoring corrosion. Important parameters contributing to corrosion are pressure, temperature, CO2 and H2S contents, chloride level, elemental sulfur, and fluid flow behavior. General corrosion tends to be very low due to the formation of iron sulfides but isolated pitting rate can be extremely high when the protective scales break down. Common pitfalls in corrosion monitoring are presented. Different intrusive and non-intrusive monitoring devices are highlighted. Successful detection of isolated pitting corrosion by ERM in one case study is presented.

Subject
Pits, Water, Corrosion rate, Walls, Sour gas, Pipelines, Inspection, Equipment, Pitting, Corrosion monitoring, Corrosion mechanisms, Electrical resistance probes, Electrical resistance
Keywords:
pipeline integrity, sour gas corrosion, FSM-IT, electrical resistance matrix, corrosion monitoring
© 2006 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).
2006
Association for Materials Protection and Performance (AMPP)
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