高阻抗电化学体系恒电位脉冲暂态过程研究  

Investigation on the Transient Current Response to Potential Pulse for an Electrochemical System with High Impedence

作　　者：宋光铃[1] 曹楚南[1] 史志明[1] 林海潮[1] 

机构地区：[1]中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室,沈阳110015

出　　处：《物理化学学报》1994年第3期204-211,共8页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：提出一套恒电位脉冲测量暂态电流的技术，通过累加生成处理，可大大降低曲线的噪声，再由非等间距的差分处理，可对电化学体系时间常数作出简便的判定，还分析了脉冲幅度以及溶液电阻的作用，并在Fe／H3BO3＋Na2B4O7体系和碳钢／砂土体系中对该方法进行了验证。A new technique of current transient response to a potential square-wave pulse was developed. Based on the technique, the disturbation of noise which is mixed with real signal can be effectively reduced by accumulation process in the current transient response, and the time constant of the electrochemical system can also be easily deter mined by plotting non-equidistance-differential-plot. Besides these, the amplitude of the potential pulse and the solution resistance of electrochemical system as well as their roles in improving 'signal/noise' ratio of transient process were discussed, and Fe/(H3BO3+Na2B4O7) and steel/sand clay corrosion systems were measured to verify the new devel oped method.

关 键 词：电化学 方波脉冲 暂态过程 电位 

分 类 号：O646[理学—物理化学]