The causes and the prevention of carbon steel corrosion in refinery amine systems are reviewed. The corrosive agents are acid gases, ammonia, oxygen, heat stable salts, and amine degradation products. Corrosion mechanisms are provided for carbon steel exposed to amine solutions and for overhead systems containing aqueous condensate. Corrosion is prevented by purification of amines and feed gases, corrosion inhibitors, use of corrosion resistant materials in selected locations, and modification of process variables. Different modes of carbon steel cracking in amine service are also discussed along with measures for their mitigation.

Subject
Acids, Water, Salts, Reflux, Corrosion reactions, Ammonia, Amines, Stress oriented hydrogen induced cracking, Carbon steel, Hydrophobic interaction chromatography, Cyanide, Stress corrosion cracking, Hydrogen
Keywords:
amines, alkanolamine, gas treating, corrosion, erosion, cyanide, water wash, ammonium polysulfide, acid gases, SSC
© 1995 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).
1995
Association for Materials Protection and Performance (AMPP)
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