A new method for assessment of susceptibility to chloride stress corrosion cracking under severe evaporative conditions has been developed. The basic idea is to test under submerged conditions simulating the electrolyte composition and concentration of sea water during evaporation. Two duplex and one austenitic stainless steel were tested loaded to the yield point at the test temperature. Time to failure, potential and temperature were recorded continuously.

The results showed cracking of the austenitic material UNS S31254 at 110 °C by long term testing. For the duplex stainless steels UNS S31803 and UNS S 32750 cracking was observed at 100 °C. The time to cracking was longest for the last mentioned and highest alloyed duplex material.

Subject
Test methods, Water, Materials, Evaporation, Salts, Stress cracking, C ring stress corrosion testing, Mechanical failure, Stainless steel, Corrosion potential, Stress corrosion cracking, Electrolytes, Chloride stress corrosion cracking
Keywords:
Test method, chloride stress corrosion cracking, highly alloyed stainless steels, concentrated sea water, evaporative conditions, safe temperature limits
© 1997 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).
1997
Association for Materials Protection and Performance (AMPP)
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