Accelerated entrance corrosion of carbon steel tubes in reactor coolers handling ethylene dichloride (EDC) containing H2O, HCl, Cl2, FeCl3, and O2 has been investigated by laboratory and in-plant corrosion monitoring studies. The mechanism of corrosion in the reactor is low temperature direct reaction of chlorine with the steel in the presence of dry ethylene dichloride. Corrosion is controlled by the rate of removal of the FeCl3 corrosion product from the steel by dissolution and convective mass transfer into the EDC stream. Corrosion rates in the cooler tube entrances are predicted from correlations of process conditions with corrosion rates measured elsewhere in the reactor by electrical resistance techniques.

Subject
Water, Correlation, Hydrogen concentration, Corrosion rate, Predicted corrosion rate, Metal surfaces, Tubes, Cooling systems, Corrosion data, Corrosion probes, Chlorine, Carbon steel, Corrosion monitoring
© 1983 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).
1983
Association for Materials Protection and Performance (AMPP)
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