若干MAX相化合物在NaOH、H_2SO_4和HCl中的电化学性质  

ELECTROCHEMICAL BEHAVIOR OF SEVERAL COMPOUNDS OF MAX PHASE IN SOLUTIONS OF NaOH,H_2SO_4 AND HCl

作　　者：王苹[1,2] 梅炳初[2] 雷零[1] 

机构地区：[1]武汉理工大学理学院应用化学系,武汉430070 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《腐蚀科学与防护技术》2009年第1期55-57,共3页Corrosion Science and Protection Technology

基　　金：国家自然科学基金(No.50572080);硅酸盐材料工程教育部重点实验室(武汉理工大学)开放课题基金资助项目(SYSJJ2005-10)

摘　　要：用热压的方法合成了若干MAX相化合物,包括211相(Ti2AlC和Ti2AlN)和312相(Ti3SiC2和Ti3AlC2);研究了它们在1 mol/L HCl、1 mol/L NaOH和1 mol/L H2SO4中的电化学性质及其结构与其稳定性的关系.结果表明:在所有溶液中,312型MAX相比211相更稳定;Ti3SiC2和Ti3AlC2几乎在所有溶液里都发生钝化,而Ti2AlC和Ti2AlN在1 mol/L HCl中活跃地溶解,还伴有大量气泡产生;Ti3SiC2比Ti2AlC、Ti2AlN和Ti3AlC2更稳定.Electrochemical performance was characterized in solutions of 1 mol/L HCl, 1 mol/L NaOH and 1 mol/L HzSO4 of several compounds of MAX phase i. e. 211phase （Ti2AlC and Ti2AlN） and 312 phase （Ti3SiC2 and Ti3AlC2 ）synthesized by hot pressing. The relation between the structure of MAX phase compounds and their stability was studied in regarding to their electrochemical behavior. It is shown that MAX compounds of 312 phase was more stable than that of 211 phase in all solutions;Ti3SiC2 and Ti3AlC2 could be passivated in all solutions,while Ti2AlC and Ti2AlN underwent active dissolution in 1 mol/L HCl with evolution of gas;Yi3SiC2 was more stable than those of Ti2AlC,Ti2AlN and Ti3AlC2.

关 键 词：MAX相 极化曲线 电化学性质 

分 类 号：TQ172.63[化学工程—水泥工业]