Corrosion behaviors of thermally grown oxide films on Fe-based bulk metallic glasses  

作　　者：Hong-xiang Li Shan-lin Wang Yeonuk Jeong Seonghoon Yi 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China. [2]School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China. [3]Department of Electronic Materials Science and Engineering, Kyungpook National University, Daegu 702-701, South Korea. [4]Department of Materials Science and Metallurgy, Kyungpook National University, Daegu 702-701, South Korea.

出　　处：《International Journal of Minerals,Metallurgy and Materials》2012年第8期726-732,共7页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.51165038);the Doctoral Startup Fund of Nanchang Hangkong University (No.EA201103238);the Korean Ministry of Commerce, Industry and Energy through the project entitled as "The Development of Structural Metallic Materials and Parts with Super Strength and High Performance"

摘　　要：Oxide films formed on the surfaces of Fe-based bulk metallic glasses in the temperature range between 373 K and 573 K were characterized and their effects on the corrosion behaviors were investigated by microstructural and electrochemical analysis. The oxide film formed at 573 K is iron-rich oxide and it exhibits an n-type semiconductor at a higher potential than 0.35 V and a p-type semiconductor at a lower potential than 0.35 V. Capacitance measurements show that the donor density decreases with the increase in oxidation temperature, while the thickness of the space charge layer increases with the oxidation temperature rising. The result of immersion tests shows that the mass loss rate increases with the oxidation temperature rising. Therefore, the correlation between microstructure and corrosion resistance needs to be proposed because the corrosion resistance is deteriorated with the development of the oxide films.

关 键 词：bulk metallic glass oxide films CORROSION CAPACITANCE 

分 类 号：TQ163[化学工程—高温制品工业] TG139.8[一般工业技术—材料科学与工程]