Instances of stress corrosion cracking in low strength ferritic steels by environments containing carbon dioxide, relating to the gas, chemical and petrochemical industries, are discussed. All are examples of cracking by carbonate-bicarbonate solutions and occur within similar ranges of potential and pH, even though other species are present and themselves exert some influence upon cracking. Possible reactions involved in defining the potential and pH ranges for cracking are considered and form the basis for suggesting that, for existing plant, potential control probably affords the most appropriate way of controlling the problem.

Subject
Steel surfaces, Corrosion failures, Anode potential, Potential range, Transgranular stress corrosion cracking, Intergranular cracking, Current densities, Crack velocity, Steel, Electric potential, Carbonate stress corrosion cracking, Protection potential, Stress corrosion cracking
© 1986 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).
1986
Association for Materials Protection and Performance (AMPP)
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