磁场和Cl^-作用下硫酸溶液中铁的恒电位电流振荡  

POTENTIOSTATIC CURRENT OSCILLATIONS OF IRON IN H_2SO_4 SOLUTION UNDER THE INFLUENCE OF Cl^- AND MAGNETIC FIELDS

作　　者：王超[1] 雷圣宾[1] 陈慎豪[1] 于锡玲 

机构地区：[1]山东大学化学系,济南250100

出　　处：《中国腐蚀与防护学报》1998年第1期27-34,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金;金属腐蚀与防护国家重点实验室资助项目

摘　　要：利用电化学和全息显微摄影技术研究了弱磁场和CI^-对Fe/0.5mol·L^(-1)H_2SO_4体系电化学振荡的影响,发现磁场和CI^-同时存在时对铁恒电位电流振荡的协同作用,对其作用机理提出了定性解释。The effects of Cl- and external magnetic fields on potentiostatic current oscillations in Fe/0.5mol·L-1 H2SO4 system were studied with electrochemical methods and holographic microphotography. The imposed magnetic field influenced the current oscillations by speeding up the mass transfer and leading to the increase in the ratio of activation time to passivation time (ta/tp). The addition of Cl- inhibited the growth of the passive film, resulting in the increase in the ta/tp, and positive shifting and narrowing down of the oscillation potential range. The existence of both the magnetic field and C- had concurrent influence on current oscillations, which might be brought about chiefly by the increase in the magnetic susceptibility of the substance formed at the iron/solution interface.

关 键 词：磁场 铁电极 电化学振荡 氯离子 铁 

分 类 号：TG174.36[金属学及工艺—金属表面处理]