Abstract The corrosion rate of Cr in molten FLiBe–CrF3 and FLiNaK–CrF3 was studied by electrochemical impedance spectroscopy and static immersion analysis. Corrosion in FLiNaK–CrF3 was greater than that in FLiBe–CrF3. The Cr corrosion kinetics were studied by high-temperature in situ ultraviolet-visible spectroscopy at 600 °C. In molten FLiBe–CrF3, the corrosion product was Cr(II), whereas in FLiNaK–CrF3, Cr(II) will convert to Cr(III) through disproportionation. After the addition of LiF into FLiBe, the Cr(II) can be converted to Cr(III), which indicates that the stability of Cr(II) is largely related to fluoroacidity.

中文翻译：

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CrF3存在下不同氟酸度熔盐中Cr的腐蚀

摘要 通过电化学阻抗谱和静态浸渍分析研究了熔融 FLiBe-CrF3 和 FLiNaK-CrF3 中 Cr 的腐蚀速率。FLiNaK-CrF3 中的腐蚀大于 FLiBe-CrF3 中的腐蚀。通过在 600 °C 下的高温原位紫外-可见光谱研究了 Cr 腐蚀动力学。在熔融的 FLiBe-CrF3 中，腐蚀产物是 Cr(II)，而在 FLiNaK-CrF3 中，Cr(II) 将通过歧化转化为 Cr(III)。在 FLiBe 中加入 LiF 后，Cr(II) 可以转化为 Cr(III)，这表明 Cr(II) 的稳定性在很大程度上与氟酸有关。