Temperature scan testing (TST) techniques (e.g. critical pitting temperature test) can provide useful tools in the examination of the onset of localized corrosion of stainless and nickel alloys. In this paper, various adaptations of these methods for three situations are described: (1) Evaluation of duplex stainless steel weldments in a weld procedure development investigation, (2) Examination of peculiar intermediate temperature SCC of nominally 45 to 50 Ni alloys, and (3) Materials selection for sour gas well operations. Special apparatus and methods are detailed for utilizing TST techniques in high pressure/high temperature environments containing H2S, CO2 and brine. The use of forward/reverse scan TST data in the investigation of corrosion film formation and stability is also presented.

Subject
Test methods, Materials, Stainless alloys, Corrosion currents, Nickel based alloys, Pipeline integrity management, Sour environments, Weldments, Pitting, Duplex stainless steel, Localized corrosion, Nickel, Stress corrosion cracking
© 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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