摘要
通过XRD、SEM对Al-Ce-Fe氧化表面形貌、晶化、成分进行研究,对氧化试样的横截面进行显微硬度测量,通过动电位极化扫描测试氧化膜的电化学耐蚀性.实验表明:非晶合金Al-Ce-Fe在550℃高温氧化后氧化膜成分为晶体的Fe2O3、Al Fe O3和Al(OH)3.显微硬度随着保温时间延长呈现先增后减的趋势.电化学极化测试结果表明随氧化时间增长,氧化膜抗蚀性下降,其中氧化300 min氧化膜的腐蚀电流密度为4.74×10-6A/cm2,氧化600 min后Icorr为2.16×10-5A/cm2.
AI-Ce-Fe amorphous alloy was oxidized at 550 ℃. The oxidized fihns were characterized by XRD and SEM, and the hard- ness of the oxidized alloys was measured. The electrochemical behavior of the oxide fihns was investigated by dynamic polarization tech- nique. The results show that a crystalline oxide fihn consisting of Fe2 03 , AlFeO3 and A1 （OH） 3 was formed on the alloys surface after high temperature oxidation. The hardness of the alloy initially increased and then decreased with oxidation time. The corrosion resist- ance of the oxide film decreased with oxidation time, and corrosion current densities of 4.74 ×10^6 A/cm2 and 2.16 × 10^-5 A/cm2 were measured on the oxide films of the alloys after oxidation for 300 and 600 minutes, respectively.
出处
《内蒙古科技大学学报》
CAS
2016年第2期144-147,共4页
Journal of Inner Mongolia University of Science and Technology
基金
科技部国际合作专项资助项目(2012DFA51260)
关键词
Al88
Ce8
Fe4
非晶
高温氧化
耐蚀性
Al88 Ce8 Fe4
Amorphous
high temperature oxidation
Corrosion resistance
