Hydrogen sulphide stress cracking (SSC) of two grades of oil country tubular goods (OCTG) steel has been assessed using constant extension rate tensile (CERT) testing together with hydrogen permeation (HE) measurements. Environmental variables studies include H2S concentration and solution pH both of which were found to influence the SSC behaviour. A close correlation was found between the normalised thickness hydrogen flux and normalised strain to failure for both grades of steel. This indicates that combining CERT testing and hydrogen permeation measurements can provide suitable criteria for material selection. The results have highlighted the significance of solution chemistry in SSC behaviour of OCTG steels.

Subject
Test methods, Materials, Hydrogen permeation, Fluxes, Hydrogen concentration, Diffusion, Hydrogen flux, Acidity, Solutions, Mechanical failure, Steel, Sulfide stress cracking, Hydrogen
Keywords:
Sulphide Stress Cracking, Hydrogen Permeation, Constant Extension Rate Tensile Testing, Oil Country Tubular Goods
© 1991 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).
1991
Association for Materials Protection and Performance (AMPP)
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