Abstract
The effects of temperature(7) on oxide films for 316L stainless steel(316L SS) in borated and lithiated water without and with Zn injection were investigated by in situ potentiodynamic polarization curves and electrochemical impedance spectra(EIS).The protective property of oxide films in the Zn-free/Zn-injected solution degraded with increasing temperature.With increasing temperature,the structure of the oxide film varied from a single layer to double layers,the Cr-rich oxide layer played a key role on retarding further oxidation.Compared to the Zn-free case,the corrosion rate decreased significantly in the Zn-injected solution due to the formation of compact Zn-bearing oxide films,but the instinct growth mechanism of the oxide films remained unchangeable.The solubilities and structure model of oxides were proposed to discuss the formation mechanism of oxide films on316L SS in the hydrothermal solution.
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