论文部分内容阅读
利用电化学极化曲线方法和电化学阻抗（EIS）技术研究了非晶合金Zr55Al10Cu30Ni5在3.5％NaCl溶液中的电化学行为.极化曲线测试结果表明,非晶合金Zr55Al10Cu30Ni5在3.5％NaCl溶液中具有很好的耐蚀性能,阳极过程表现出钝化的特征,当极化电位很高时,非晶合金出现了点腐蚀.电化学交流阻抗测试表明,在阴极极化、开路电位和钝化电位下,非晶合金的Nyquist图由单容抗弧构成,具有很高的电荷转移电阻,表现出优良的耐蚀性,在点蚀电位附近和点蚀电位区EIS分别有两个时间常数和三个时间常数.非晶合金在3.5％NaCl溶液中浸泡12h后,耐蚀性能有所下降.
The electrochemical behavior of amorphous alloy Zr55Al10Cu30Ni5 in 3.5% NaCl solution was investigated by electrochemical polarization curve and electrochemical impedance spectroscopy (EIS). The results of polarization curves show that the amorphous alloy Zr55Al10Cu30Ni5 has the following properties in 3.5% NaCl solution Good corrosion resistance, the anodic process showed the characteristics of passivation, when the polarization potential is high, the amorphous alloy pitting corrosion electrochemical electrochemical impedance spectroscopy test showed that the cathodic polarization, open circuit potential and passivation potential , The Nyquist diagram of amorphous alloy consists of a single capacitive arc with a high charge transfer resistance and exhibits excellent corrosion resistance. There are two time constants near the pitting potential and the pitting potential region, EIS, and three A time constant of the amorphous alloy immersed in 3.5% NaCl solution for 12h, the corrosion resistance decreased.