氧化时间对2A12铝合金阳极氧化膜开裂行为的影响  

Effect of anodizing time on cracking behavior of anodic oxide film of 2A12 alloy

作　　者：刘建华[1] 高庆娜[1] 于美[1] 李松梅[1] 李英东[1] 张世平[1] 杨茗佳 王永平 

机构地区：[1]北京航空航天大学材料科学与工程学院空天先进材料与服役教育部重点实验室,北京100191 [2]北京星航机电装备有限公司,北京100074

出　　处：《材料热处理学报》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)

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.

关 键 词：阳极氧化膜 热冲击 裂纹 耐蚀性 

分 类 号：TG178[金属学及工艺—金属表面处理]