Crude distillation unit cold tower corrosion has become more prevalent in recent years. Tower tray corrosion and related fouling is often associated with limiting crude throughput; reduced run lengths; and high equipment replacement costs.

This paper will address the corrosion mechanisms responsible for aqueous corrosion of crude unit distillation trays and top pumparound exchangers. Research data are presented to define: 1) the corrosion potential of different metallurgy under simulated tower top conditions and 2) the benefits of chemical treatment.

Unique monitoring methods have been developed which better define the corrosion variables and facilitate the evaluation of chemical treatment. Case histories are presented which document results obtained with the monitoring programs and successful applications of chemical treatment for corrosion control.

Subject
Filming inhibitors, Water, Salts, Corrosion rate, Reflux, Water dew, Naphtha, Aqueous corrosion, Amines, Desalting, Towers, Monel alloys, Chlorides
Keywords:
corrosion prevention, crude distillation unit, inhibitor, petroleum refining, monel, carbon steel
© 1990 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).
1990
Association for Materials Protection and Performance (AMPP)
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