Experience with various carbon bed absorbers illustrates the unique challenges faced in selection of appropriate materials of construction. The conditions are most aggressive during carbon regeneration, when bed temperatures reach 120°C, at elevated organic and chloride concentrations. The galvanic effect of the activated carbon must be considered in making the appropriate material selection. Titanium alloys are the best metallic materials of construction for carbon bed adsorbers that are subject to oxidizing acidic conditions. One of the major challenges facing titanium alloys is the corrosion of weldments. This is illustrated by the experience in the hydrochloric acid stripping columns and piping.

Subject
Test methods, Materials, Piping, Metal coupons, Corrosion attacks, Mechanical failure, Construction, Titanium, Carbon, Monel alloys, Corrosion resistance, Titanium alloys, Chlorides
Keywords:
carbon bed absorbers, titanium alloys, field coupon testing, material selection, case histories, welding, crevice corrosion, iron contamination
© 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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