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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.
The morphology, crystallization and composition of the surface of Al-Ce-Fe oxide were studied by XRD and SEM. The microhardness of the oxidized sample was measured. The electrochemical corrosion resistance of the oxide film was measured by potentiodynamic polarization scanning The experimental results show that the microhardness of Al-Ce-Fe amorphous alloy increases firstly and then decreases with the increase of holding time after the high temperature oxidation of amorphous Al-Ce-Fe at 550 ℃ The electrochemical polarization test results showed that with the increase of oxidation time, the corrosion resistance of the oxide film decreased, the corrosion current density of the oxidation film after 300 min oxidation was 4.74 × 10-6 A / cm2, and the Icorr after 600 min oxidation was 2.16 × 10- 5A / cm2.