阳极氧化时间对2A12铝合金剥落腐蚀性能的影响  

Effects of Anodizing Time on Exfoliation Corrosion Properties of 2A12 Aluminum Alloy

作　　者：肖可谋 聂伟军 蹇海根[1] 王业东 杨孝梅 XIAO Kemou;NIE Weijun;JIAN Haigen;WANG Yedong;YANG Xiaomei(College of Materials and Advanced Manufacturing,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学材料与先进制造学院,湖南株洲412007

出　　处：《湖南工业大学学报》2022年第4期39-46,共8页Journal of Hunan University of Technology

基　　金：湖南省创新型省份建设专项科普专题基金资助项目(2020ZK4023);湖南省教育厅科研基金资助重点项目(20A147);教育部产学合作协同育人基金资助项目(202102072081)。

摘　　要：利用扫描电镜(SEM)、能谱仪(EDS)以及膜厚测量等分析测试方法研究了不同阳极氧化时间对2A12铝合金抗剥落腐蚀性能的影响。结果表明:随着阳极氧化时间延长,氧化膜厚度逐渐增加,其抗剥落腐蚀性能越好。当阳极氧化时间从30 min延长至60 min时,氧化膜厚度从2.43μm增大到4.72μm,膜厚标准差从0.75减少至0.52。但是当阳极氧化时间超过60 min后,氧化膜厚度增长趋势缓慢,膜厚标准差逐渐趋于一水平值。宏观、微观形貌综合分析结果表明,当阳极氧化时间为60 min时,2A12铝合金的耐腐蚀性能最好。A research has been conducted on the effects of different anodizing times on the exfoliation corrosion resistance of 2A12 aluminum alloy by means of scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and film thickness measurement.The results show that with the increase of anodizing time,the thickness of anodic oxide film increases gradually,with an improved performance in the anti-exfoliation corrosion.With the anodization time extended from 30 min to 60 min,the thickness of the oxide film increases from 2.43μm to 4.72μm,meanwhile,the standard deviation of the film thickness decreases from 0.75 to 0.52.However,when the anodizing time exceeds 60 min,the thickness of the oxide film increases slowly,with the standard deviation of the film thickness gradually tending to be a level value.A comprehensive analysis of macroscopic and microscopic morphology shows that the corrosion resistance of the alloy is characterized with the best performance with an anodizing time of 60 min.

关 键 词：2A12铝合金 阳极氧化膜 剥落腐蚀 耐腐蚀性能 

分 类 号：TG171[金属学及工艺—金属表面处理]