Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 542, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnucmat.2020.152483
Keywords
Fretting corrosion; Dissolved oxygen; Partial slip; Pitting-like damage; Fatigue cracking; Alloy 690TT
Funding
- Beijing Natural Science Foundation [2194081]
- China Postdoctoral Science Foundation [2018M641187]
- Fundamental Research Funds for the Central Universities [FRF-TP-18-047A1]
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Partial slip fretting corrosion of Alloy 690TT comes up in the steam generator of a nuclear power plant, in which the damage mechanisms are transformed as dissolved oxygen (DO) varies. In this work, the coupling between the action of oxide particles sticking into the surface and the electrochemical corrosion caused severe pitting-like damage, which was enhanced by an increase in DO concentration increasing the wear volume. The initiation of fatigue cracking was controlled by the slip dissolution along with the competition between the film rupture rate and the repassivation rate as DO changes. (C) 2020 Elsevier B.V. All rights reserved.
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