物理化学学报 >> 1994, Vol. 10 >> Issue (03): 204-211.doi: 10.3866/PKU.WHXB19940304

研究论文 上一篇    下一篇

高阻抗电化学体系恒电位脉冲暂态过程研究

宋光铃, 曹楚南, 史志明, 林海潮   

  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
  • 收稿日期:1992-08-31 修回日期:1992-12-18 发布日期:1994-03-15
  • 通讯作者: 宋光铃

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

Song Guang-Ling, Cao Chu-Nan, Shi Zhi-Ming, Lin Hai-Chao   

  1. Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang 110015
  • Received:1992-08-31 Revised:1992-12-18 Published:1994-03-15
  • Contact: Song Guang-Ling

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/H_3BO_3+Na_2B_4O_7体系和碳钢/砂土体系中对该方法进行了验证。

关键词: 电化学, 暂态测量, 电流响应, 方波脉冲

Abstract:

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/(H_3BO_3+Na_2B_4O_7) and steel/sand clay corrosion systems measured to verify the new devel-oped method.

Key words: Electrochemistry, Transient process, Current response, Square-wave pulse