用扫描Kelvin探头和电化学极化等手段，研究了微液滴现象 与大气腐蚀的电化学过程之间的相关性.扫描Kelvin探头测定主液滴周围的电位分布显示， 微液滴只在表面的正电性区域出现；当有微液滴形成时，火山形电位分布的峰高且宽、谷深 且窄；同时，峰变宽的速率与微液滴的扩展速率近似相等.电化学极化结果显示，微液滴的 成核速率随极化电流的增加而线性加速，促使大气腐蚀过程发生的电位差和相应的腐蚀电流 是微液滴形成和发展的推动力.
Micro-droplets phenomenon has a close relation with the electrochemical process of atmospheric corrosion.A volcano pattern of poten tial distribution with a potential valley in the center of main-droplet and a po tential annular peak in the area covered with micro-droplets was observed by sca nning Kelvin probe.The electrochemical polarization results proved that the spre ading rate of micro-droplets increased linearly with the polarization current,an d the corrosion current established by the potential difference between the cent ral and peripheral area of main-droplet was the true driving force for the forma tion and spreading of micro-droplets.
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