采用微弧氧化技术在316L不锈钢基体上制备了氧化铝阻氚涂层,利用XRD、SEM、涡流法对涂层进行了相结构、表面形貌、膜厚的分析,并进行了划痕实验、抗热震性能及阻氚性能测试。结果表明:相结构、表面形貌、膜厚受到微弧氧化电流密度、电压、反应时间的影响。其中,电流密度、电压都能改变涂层相结构,较高电流密度将促进Al→Al_2O_3的形成,而较高电压将促进γ-Al_2O_3→α-Al_2O_3的相变。提高电压、反应时间,涂层表面放电孔洞将变大从而影响表面质量;最佳电流密度为9 A/dm~2,此时表面质量较好。通过性能测试及综合分析,最佳工艺参数为6 A/dm~2、300 V、30 min,膜基结合力、抗热震较好,能使316L不锈钢的氚渗透率降低3个数量级。 The alumina triturate coating was prepared on 316L stainless steel substrate by micro-arc oxidation technique. The phase structure, surface morphology and film thickness of the coating were analyzed by XRD, SEM and eddy current method. The scratch test, Thermal shock resistance and tritium resistance test. The results show that phase structure, surface morphology and film thickness are affected by micro-arc oxidation current density, voltage and reaction time. Among them, the current density and the voltage can change the phase structure of the coating. The higher current density will promote the formation of Al → Al_2O_3, while the higher voltage will promote the phase transformation of γ-Al_2O_3 → α-Al_2O_3. When the voltage and reaction time are increased, the surface discharge holes will become larger and the surface quality will be affected. The optimum current density is 9 A / dm ~ 2, and the surface quality is better. Through the performance test and comprehensive analysis, the optimal process parameters are 6 A / dm ~ 2,300 V, 30 min, the film-based bonding strength and thermal shock resistance are good, which can reduce the tritium permeability of 316L stainless steel by 3 orders of magnitude.