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采用失重法,电化学测试技术,X射线衍射(XRD)并结合扫描电镜(SEM)研究了模拟工业环境下直流电场对金属Zn在30 d内腐蚀行为的影响。结果表明,模拟工业环境下,在一定暴露时间内,直流电场强度越大,Zn的腐蚀速率越大。随着直流电场的介入,Zn的阴极还原过程与阳极溶解过程均有提高,从而腐蚀速率增加。直流电场对于Zn腐蚀行为的影响本质上归结于电场对溶液中离子分布的影响,进而改变了腐蚀产物的结构,促进了腐蚀过程的进行。
The effect of DC electric field on the corrosion behavior of metal Zn in 30 d simulated industrial environment was investigated by weight loss method, electrochemical test technique, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that in a simulated industrial environment, the greater the DC electric field strength, the greater the corrosion rate of Zn within a certain exposure time. With the intervention of DC electric field, the cathodic reduction process and anodic dissolution process of Zn both increase, and the corrosion rate increases. The effect of DC electric field on the corrosion behavior of Zn is essentially attributed to the influence of electric field on the ion distribution in the solution, which in turn changes the structure of the corrosion products and promotes the corrosion process.