论文部分内容阅读
由于大气腐蚀高阻抗的特征,传统的参比电极难以用于大气腐蚀研究之中.为了获取准确的大气腐蚀电化学信息,我们需要对传统的参比电极进行修改.本文在三电极体系中采用修改的参比电极,通过电化学阻抗和电化学极化两种方法研究铜在含有(NH4)2SO4液滴下的腐蚀行为,结果表明液滴下铜的平均腐蚀速率随着液滴体积从1到20μL增加而减小;当液滴高度不超过850μm时,平均腐蚀速率随着液滴高度的减小却迅速地增大.此外,电化学阻抗和电化学极化得出的腐蚀速率相一致,这证明修改的参比电极可以用于液滴下的大气腐蚀研究.
Due to the high resistivity of atmospheric corrosion, the traditional reference electrode is hard to be used in the research of atmospheric corrosion.In order to obtain the accurate electrochemical information of atmospheric corrosion, we need to modify the traditional reference electrode.In this paper, The modified reference electrode was used to study the corrosion behavior of copper under (NH4) 2SO4 droplets by electrochemical impedance and electrochemical polarization. The results show that the average corrosion rate of copper under the droplet varies with the droplet volume from 1 to 20 μL Increases and decreases; when the droplet height does not exceed 850μm, the average corrosion rate rapidly increases with droplet height.In addition, the electrochemical impedance and the electrochemical polarization obtained by the corrosion rate of the same, which The modified reference electrode can be used for atmospheric corrosion studies under liquid droplets.