Optimization of Cr/Mo molar ratio in FeCoCrMoCBY alloys for high corrosion resistance

作     者：Cheng-jie WANG Qing-jun CHEN Huai-xiao XIA 王诚杰;陈庆军;夏怀效

作者机构：School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2017年第27卷第12期

页      面：2663-2672页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project(51261021)supported by the National Natural Science Foundation of China Project(KJLD13056)supported by the Science and Technology Landing Plan of Jiangxi Province,China 

主　　题：bulk metallic glasses corrosion resistance passive film electrochemical measurement Cr/Mo molar ratio 

摘      要：The corrosion behavior of bulk metallic glasses(BMGs)(Fe41Co7Cr15Mo14C15B6Y2)100-xCrx(x=0,4,8,12,molar fraction,%)was investigated in1mol/L HCl aqueous solution with electrochemical *** electrochemical measurements demonstrate that the passive current density of Fe-based amorphous alloy is reduced by about one order of magnitude,and meanwhile,the stability of passive film can be guaranteed by the Cr/Mo molar *** Mott–Schottky(M–S)curves show that the passive film is the densest when the molar ratio of Cr/Mo is between1.37and1.69.X-ray photoelectron spectroscopy(XPS)analysis was performed to clarify chemical states of elements in the passive *** results show that the corrosion resistance of the alloy is related to the molar ratio of Cr/*** stability of passive film is determined by the synergistic action of Cr and Mo *** main component of the passive film is Cr3+*** the potential is greater than0.5V(vs SCE),Mo6+ions play an important role in keeping the stability of the passive *** appropriate molar ratio of Cr/Mo can reduce the dissolution rate of the passive film.