Amine solutions are used in the refinery to absorb sour gases from various refinery streams. Because of the variety of components in these streams, the solutions often become more corrosive than the amine solution by itself. A protocol has been developed to examine plant solutions for these corrosive materials. Both analytical and laboratory corrosion tests are used. Analyses are performed for light organic acids, such as formic, acetic, propionic and butyric. The amount of dissolved iron, in excess of about 50 ppm, indicates that the amine may contain chelating agents such as HEOZD, THEED, DEP. Once the causes of high corrosivity have been determined, recommendations are made to deal with the specific problem at each refinery system. An annual survey is useful in detecting problems which are not apparent in day-to-day operations.

Subject
Acids, Hydrogen sulfide, Ions, Iron sulfide films, Corrosion rate, Iron sulfides, Oxide films, Refineries, Solutions, Amines, Film formation, Formic acid, Equipment
Keywords:
Amines, Laboratory tests, Organic acids, Chelating agents
© 1996 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).
1996
Association for Materials Protection and Performance (AMPP)
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