Laboratory tests suggest that the accelerated corrosion of commercially pure nickel and 26-1 stainless steel that has been observed in first-effect environments of quadruple-effect caustic evaporators results from increased temperatures and velocity of the circulating caustic material. Of the eleven materials tested, however, none resisted corrosion better than Nickel 200 or 201 and 26-1 stainless steel in immersion and stress-corrosion-cracking tests of sheet and tubing in actual and simulated first-effect evaporator liquor and other caustic solutions. Tests of welded materials showed that AWS ENi-CI electrode (95 Ni, 3 Fe, 1 C) produces more resistant welds than the currently used AWS ENi-1 electrode (96 Ni, 2.5 Ti).

Subject
Weld attack, Materials, Corrosion resistant alloys, Corrosion rate, Nickel based alloys, Liquor, Tubes, Corrosion products, Corrosion resistance, Stainless steel, Nickel, Alloys, Electrodes
© 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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