Ammonium bisulfide has been the well known main culprit of aqueous corrosion in hydroprocessing units. A lesser understood and, at times, more menacing aqueous corrosion problem in these units has been due to chloride salts. Chlorides can be introduced into the system through the feed and/or through the make-up hydrogen gas. This paper describes case histories of chloride related problems and the means for minimizing such occurrences.

Subject
Water, Piping, Salts, Flanges, Hydroprocessing, Thermal stress, Stress, Tubing, Tensile stress, Ammonium chloride, Stainless steel, Chlorides, Chloride stress corrosion cracking
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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