摘要
采用不同阳极氧化时间制备氧化膜,并采用扫描电镜、电子探针、连续性检测、交流阻抗法和盐雾腐蚀试验对阳极氧化膜进行了研究。结果表明,不同阳极氧化时间生成的氧化膜层经热冲击后都会出现非穿透性裂纹;随阳极氧化时间延长,经热冲击后,氧化膜层裂纹密度增大。综合考虑不同氧化时间下制备的氧化膜的开裂行为和耐蚀性变化,阳极氧化30 min制备的膜层在热冲击后具相对较好的防护性能。
Anodic oxide film was obtained by different anodizing time. The anodic oxide film was studied by using scanning electron microscopy( SEM),electron probe,continuity test,electrochemical impedance spectroscopy( EIS) and salt spray corrosion tests. It is shown that some cracks present in the sealed anodic oxide film of different oxidation time after the thermal shock,but the cracks hardly penetrate through the film. With the increasing oxidation time,the density of cracks in anodic oxide film increases after the thermal shock.Considering the cracking behavior and corrosion resistance of oxide films on different oxidation,anodic oxide film obtained at 30 min has the best corrosion resistance after the thermal shock.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第3期159-164,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51171011)
关键词
阳极氧化膜
热冲击
裂纹
耐蚀性
anodic oxide film
the thermal shock
cracks
corrosion resistance
