To understand the role of elemental sulfur in the stress corrosion cracking (SCC) of corrosion resistant alloys, researchers have tried various test techniques and methodologies with limited success. We feel we have developed a reliable test method for charging sulfur into Slow Strain Rate Test (SSRT) autoclaves.

An effective SSRT method using a special cup-sulfur cell, has been described to evaluate the susceptibility to SCC in sulfur containing environments. The results obtained are reproducible and reliable. Using this test method, the effect of chloride concentration on the threshold temperature for SCC in sulfur containing sour brine has been initially evaluated. UNS N06950 was determined to have a higher temperature threshold compared with UNS N06255 and UNS N06985.

Subject
Sulfur, Test methods, Materials, Secondary cracks, Photography, Laboratory data, Nickel based alloys, Autoclaves, Sour environments, Sour brine, Chlorides, Stress corrosion cracking, Chloride stress corrosion cracking
Keywords:
SSR testing, test method, oil and gas, stress corrosion cracking, sulfur, corrosion resistant alloys
© 1994 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).
1994
Association for Materials Protection and Performance (AMPP)
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