This paper summarizes results of a joint industry program (JIP) to address ammonium bisulfide (NH4HS) corrosion in H2S-dominated alkaline sour waters typically found in refinery services such as the reactor effluent air cooler (REAC) systems of hydroprocessing units. The impacts of several process variables on corrosion were quantified. Key learnings support a paradigm shift from the rules of thumb previously applied to these systems. Data collected were used to develop a software tool to predict the corrosion rate of 14 materials evaluated in the program.

Subject
Materials, Corrosion resistant alloys, Stainless alloys, Corrosion rate, Wall shear stress, Partial pressures, Sour water, Corrosion data, Carbon steel, Corrosion protection, Corrosion coupons, Alloys, Hydrocarbons
Keywords:
sour water, ammonium bisulfide, NH4HS, hydrogen sulfide, H2S, partial pressure, isocorrosion diagram, temperature, chloride, hydrocarbon
© 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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