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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C_(sc)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C_(sc)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.
The electrochemical behavior of low carbon steel with surface deposition of nickel in 3.5% NaCl solution was investigated by potentiometric-capacitive test combined with Mott-Schottky analysis and electrochemical impedance spectroscopy. The results showed that the surface of bare carbon steel electrode in 3.5% NaCl solution The capacitance of space charge layer C sc increases with the increase of test potential and shows the conductivity of p type semiconductor. The capacitance of space charge layer C sc on the surface of low carbon steel deposited with nickel varies with the condition of nickel deposition and the scan potential Varies, and surface deposition of nickel alters the semiconducting properties of mild steel in 3.5% NaCl solution.