ABSTRACT High temperature corrosion behaviour of 2.25Cr–1Mo, 9Cr–1Mo and SS 410 in molten UCl3–LiCl–KCl salt at 500 and 600°C under inert and reactive atmospheres for 24 h were studied by thermogravimetry. The results indicate marginal weight gains in all the alloys. In all conditions, except at 600°C under reactive atmosphere, the weight gains were higher in initial period of exposure. The weight gain was continuous for samples studied at 600°C under reactive atmosphere. The 2.25Cr–1Mo showed higher weight gain in an inert atmosphere, whereas SS 410 showed more weight gain at 500°C and 9Cr–1Mo at 600°C under reactive atmosphere. The weight gains were attributed to the formation of γ-FeOOH, α-Fe2O3, Fe3O4, FeCr2O4 and Cr2O3 as confirmed by Raman spectra analysis. The oxide films formed are neither uniform as evidenced from SEM-EDS analysis nor protective, attributed to the corrosive and aggressive nature of molten chloride salts.

中文翻译：

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UCl3-LiCl-KCl中结构材料的高温熔盐腐蚀

摘要 2.25Cr-1Mo、9Cr-1Mo 和 SS 410 在 500 和 600°C 惰性和反应性气氛下熔融 UCl3-LiCl-KCl 盐中的高温腐蚀行为通过热重法研究了 24 小时。结果表明所有合金的重量都略有增加。在所有条件下，除了在 600°C 的反应气氛下，暴露初期的增重都较高。在 600°C 反应气氛下研究的样品的重量增加是连续的。2.25Cr-1Mo 在惰性气氛中显示出更高的增重，而 SS 410 在 500°C 下显示出更多的增重，而 9Cr-1Mo 在 600°C 下在反应性气氛下显示出更多的增重。拉曼光谱分析证实，重量增加归因于 γ-FeOOH、α-Fe2O3、Fe3O4、FeCr2O4 和 Cr2O3 的形成。