|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials 2021
||In-situ Electrochemical Analysis of Zirconium Alloy with UV Irradiation at High Temperature Water
||Taeho Kim, Zefeng Yu, Antoine Ambard, Adrien Couet
|On-Site Speaker (Planned)
The objective of this study is to investigate the effect of UV irradiation on the in-situ electrochemical response of zirconium alloy material for fuel cladding. The temperature and pressure are controlled at 320 ℃ and 13 MPa, using a recirculatory loop, and 200 mW/cm2 UV irradiates the sample through a sapphire window in the autoclave. The electrochemical behavior of Zircaloy-4 under UV is investigated with electrochemical techniques. Fe enriched deposits are observed on the top of zirconium oxide surface under UV irradiation, and the kinetics of zirconium oxide growth are altered under UV irradiation. Microstructural analysis using electron microscopy is conducted to characterize deposits and oxide layer. The electrochemical data including Tafel behavior, oxide resistivity and impedance values is analyzed to characterize the effects of UV on oxide properties. A photo-electrochemical mechanism is proposed to explain the Fe oxide deposition and corrosion mechanism of zirconium alloy under UV irradiation.