Erbium oxide (Er₂O₃) coating has gained much attention as an effective measure to assist in solving some destructive problems in Tokamak blanket system. In this paper, Er₂O₃ coatings were deposited by sol-gel method on the SUS 304 stainless steel substrate, and then immersed the coating specimens in liquid lithium at 500℃ lasting for 600 h for corrosion resistance study. The coatings prepared at different temperatures before and after corrosion were characterized by XRD and SEM for crystal structure, surface and internal stress analysis. The grain size of Er₂O₃ layer varied with the annealing temperature, and the bigger size can be obtained by higher temperature. Lithium corrosion resistance of coating was analyzed by Calibration free laser-induced breakdown spectroscopy (CF-LIBS) with the content ratio of erbium to lithium to analyze the depth distribution of lithium. It is conservatively estimated that when the ratio is greater than 20, lithium disappeared in the coating, and the penetration depth is less than 0.5 μm. Analysis result support the hypothesis of the mechanism of corrosion product formation and confirm the reliable resistance of coating to lithium corrosion.

氧化（Er ₂ O ₃）涂层作为帮助解决Tokamak胶布系统中某些破坏性问题的有效措施而受到了广泛关注。本文通过溶胶-凝胶法将Er ₂ O ₃涂层沉积在SUS 304不锈钢基底上，然后将涂层试样在500℃的液态锂中浸泡600 h，以进行耐蚀性研究。用XRD和SEM表征了腐蚀前后在不同温度下制备的涂层的晶体结构，表面和内应力。Er ₂ O ₃的晶粒度随退火温度的不同，层的厚度会变大，而较高的温度可以得到更大的尺寸。采用无标定激光诱导击穿光谱法（CF-LIBS），以to与锂的含量比分析了涂层的耐锂腐蚀性能，分析了锂的深度分布。保守地估计，当该比率大于20时，锂在涂层中消失，并且渗透深度小于0.5μm。分析结果支持了腐蚀产物形成机理的假设，并证实了涂层对锂腐蚀的可靠抵抗力。