采用Kelvin探头和体视显微镜观察技术, 研究了微液滴在金属表面液膜形成过程中的作用. 金属表面电位分布特征和显微镜在线观察的结果表明, 微液滴可以增强金属表面的润湿能力, 促进液膜在金属表面的形成和扩展, 并能促使金属表面不同部位的液膜的扩展和交联, 形成大面积连续液膜, 从而促进大气腐蚀过程的快速发展.
The characteristics of the formation and spreading process of micro-droplets was investigated in detail based on the potential distribution of micro-droplets and thin electrolyte layer on metal surface in a humidity-controlled chamber by scanning Kelvin probe and stereoscopic microscope. The results proved that micro-droplets could intensify the wetting ability of a metal surface and promote formation and spreading of thin electrolyte layer on the metal surface. Meanwhile, micro-droplets could accelerate the formation and expansion of localized thin electrolyte layers on various locations, and further promote them merging together to form continuous thin film. The formation of continuous thin electrolyte layer on metal surface means that atmospheric corrosion steps into the rapid development stage.
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