用电位-电容测试结合Mott-Schottky分析技术以及电化学阻抗方法研究表面沉积镍的低碳钢在3.5%NaCl溶液中的电化学行为. 结果表明, 裸碳钢电极在 3.5%NaCl溶液中表面空间电荷层电容Csc随测试电位升高逐渐增大, 并且表现出p型半导体的导电特性; 沉积镍的低碳钢表面空间电荷层电容Csc 随沉积镍的条件及扫描电位的不同有所变化, 并且表面沉积镍会改变低碳钢在 3.5%NaCl溶液中的半导体导电特性.
In this paper, capacitance-potential measurement and Mott-Schottky analysis and electrochemical impedance technique were used to study the electrochemical behavior of nickel-plated mild steel in 3.5%NaCl solution. The results showed that the surface space charge layer capacitance Csc of the mild steel electrode in 3.5%NaCl solution, showing a p-type semiconducting in nature, gradually increased with the increasing of the tested potential. Also, the surface space charge layer capacitance Csc of the deposition of nickel-low carbon steel changes as the change in deposition conditions of nickel and scanning potential as well. At the same time, nickel plating can change the semiconducting properties of semiconductors of the electrode system of nickel plated mild steel in 3.5% NaCl solution.
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