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Stress corrosion of iron-base alloys in high temperature water environments

Lookup NU author(s): Dr Alasdair Charles

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Abstract

Work performed at Newcastle relating to the conditions that induce stress corrosion cracking in iron base alloys when exposed to high temperature water environments are presented. The alloys crack during slow strain rate tests in simulated light water reactor environments, but only if the conditions generate high (anodic) electrode potentials. Cracks often initiate at sulphide inclusions but can also be initiated at slip-steps and/or corrosion pits. Sulphate contamination of the water enhances cracking for low sulphur content alloys but has little effect if the alloy already contains many sulphide inclusions. Susceptibility to cracking is influenced by water temperature, the electrode potential, the applied strain and the crack-tip strain rate. The usefulness of slow strain rate tests under applied potential control for assessing susceptibility to SCC and for studying the mechanism of cracking is discussed.


Publication metadata

Author(s): Congleton J, Charles EA

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Symposium on Chemistry and Electrochemistry of Corrosion and Stress Corrosion Cracking - A Symposium Honoring the Contributions of RW Staehle

Year of Conference: 2001

Pages: 231-250

Publisher: Minerals, Metals and Materials Society

Library holdings: Search Newcastle University Library for this item

ISBN: 087339478X


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