论文部分内容阅读
研究了在电极表面的等效电路为极化电阻Rp与表面电容C并联的情况下由正弦波动电流扫描极化曲线所形成的滞后圈。推导并验证了极化曲线和滞后圈高度的方程式。发现,根据滞后圈高度可以同时测定Rp和C。由于滞后圈高度是在极化电流密度i=0时测定的,溶液电阻不影响测量结果,所以这种方法适用于高电阻率的介质系统。测定了Fe在一次蒸馏水中和长春自来水中的Rp和C。
The hysteresis loop formed by the sinusoidal sweep current sweep polarization curve was studied when the equivalent circuit on the electrode surface was a polarization resistor Rp in parallel with the surface capacitance C. Fig. The equation of polarization curve and hysteresis loop height was derived and verified. It is found that Rp and C can be determined simultaneously based on the lag height. Since the hysteresis loop height is measured at a polarization current density of i = 0, the solution resistance does not affect the measurement result, so this method is suitable for a high-resistivity media system. The Rp and C of Fe in distilled water and Changchun tap water were determined.