Effect of temperature on corrosion behavior of alloy 690 in high temperature hydrogenated water
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第8期
论文作者：Jiazhen Wang Jianqiu Wang Hongliang Ming Zhiming Zhang En-Hou Han
文章页码：1419 - 1427
摘 要：The influence of temperature on the corrosion behavior of Alloy 690 is evaluated using potentiodynamic polarization curves,electrochemical impedance spectra（EIS）,scanning electron microscopy（SEM）,Xray photoelectron spectroscopy（XPS） and transmission electron microscopy（TEM）.The corrosion rate of Alloy 690 reaches a local maximum at 250?C.The kinetic control step of the growth of oxide film changes from the diffusion process of aqueous-phase ions to the growth of Cr-rich barrier layer in the temperature range of 200–300?C.A modified double-layer model is proposed to describe the effect of temperature on the structure and composition of the oxide film.
Jiazhen Wang1,2，Jianqiu Wang1，Hongliang Ming1，Zhiming Zhang1，En-Hou Han1
1. Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences2. Reactor Engineering Research Sub-Institute,Nuclear Power Institute of China
摘 要：The influence of temperature on the corrosion behavior of Alloy 690 is evaluated using potentiodynamic polarization curves,electrochemical impedance spectra（EIS）,scanning electron microscopy（SEM）,Xray photoelectron spectroscopy（XPS） and transmission electron microscopy（TEM）.The corrosion rate of Alloy 690 reaches a local maximum at 250?C.The kinetic control step of the growth of oxide film changes from the diffusion process of aqueous-phase ions to the growth of Cr-rich barrier layer in the temperature range of 200–300?C.A modified double-layer model is proposed to describe the effect of temperature on the structure and composition of the oxide film.
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