This study shows properly selected corrosion inhibitors can be used to control corrosion in wet, sour gas lines containing elemental sulfur. Laboratory tests indicate certain types of inhibitors are more effective than others in the presence of elemental sulfur. Certain water soluble inhibitors are shown to increase the corrosion rate in the presence of deposited sulfur. The laboratory test data were generated in the presence of 65% CO2, 5% H2S and sulfur over a temperature range of 40°C to 120°C. Field corrosion coupon data over a three-year period agreed well with laboratory test data generated under simulated field conditions. The results indicate that for effective inhibition to take place, inhibitor films must be in place before sulfur deposition occurs.

Subject
Sulfur, Water, Corrosion rate, Metal surfaces, Inhibitor films, Autoclaves, Steel coupons, Solubility, Flowlines, Deposition rate, Corrosion inhibitors, Corrosion protection, Deposit corrosion
Keywords:
corrosion inhibitor, sour gas, wet, gas line, elemental sulfur, temperature, carbon steel, deposited, dispersed, field test
© 1992 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).
1992
Association for Materials Protection and Performance (AMPP)
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