This paper demonstrates that electrochemical noise data can be acquired in the nominally dry overhead lines of a debutaniser and that this data can be used to provide an insight to the corrosion activity. The paper seeks to achieve this through providing a series of examples of electrochemical noise data acquired within a debutaniser overhead line while operating under varying conditions.

The study is specific to a debutanizer overhead line for which corrosion control was originally achieved through a water wash and inhibitor injection but which, overtime, led to corrosion problems in the overhead piping upstream of the condensers. After the replacement of this piping, it was decided that the system should be operated dry and that monitoring could be used to evaluate the effectiveness of this process change.

Subject
Films, Water, Piping, Moisture, Electrochemical noise, Reflux, Corrosion activity, General corrosion rate, Electrochemical data, Corrosion inhibitors, Corrosion data, Corrosion probes, Pitting
Keywords:
Corrosion monitoring, electrochemical noise localised corrosion, refineries, real time corrosion monitoring, pitting corrosion
© 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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