Micro-droplets formation during the deliquescence of salt particles in atmosphere

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	Micro-droplets formation during the deliquescence of salt particles in atmosphere
	J. Zhang; J. Wang; Y. Wang
	2005
发表期刊	Corrosion
ISSN	0010-9312
卷号	61 期号:12 页码:1167-1172
摘要	The formation of the electrolyte droplet caused by the deliquescence of soluble salt particles is one cause for the acceleration of atmospheric corrosion. In this paper, a lot of microdroplets, 1 mu m to similar to 10 mu m in diameter, were observed around the edge of the main-droplet formed by the deliquescence of a single salt particle deposited on metals in atmosphere. Two preconditions were needed for the formation of micro-droplets. One was that the relative humidity (RH) in atmosphere should be over the saturated RH of the main-droplet. The other was that the metal substrate could be eroded under the maindroplet. The corrosion current was proven to be the driving force for the formation of micro-droplets by electrochemical polarization. Based on the surface analyses of scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), there were some sodium cations and a few chloride anions in micro-droplets for a main-droplet of sodium chloride (NaCl). The formation of invisible water clusters and water film, synergistic action of the oxygen reduction and the water molecule adsorption, and migration of cations in the main-droplet were regarded as the main phases for the formation of microdroplets.
部门归属	chinese acad sci, inst oceanol, qingdao 266071, peoples r china. ocean univ china, qingdao 266003, peoples r china. state key lab corros & protect met, shenyang 110015, peoples r china.;zhang, j (reprint author), zhangjiang ocean univ, marine environm lab, zhanjiang 524088, peoples r china
关键词	Atmospheric Corrosion Electrochemical Polarization Micro-droplets Formation Salt Particles In-situ Corrosion Copper Water Zinc Nucleation Mechanism Surface Films Iron
URL	查看原文
WOS记录号	WOS:000234241900005
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35209
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,J. Wang,Y. Wang. Micro-droplets formation during the deliquescence of salt particles in atmosphere[J]. Corrosion,2005,61(12):1167-1172.
APA	J. Zhang,J. Wang,&Y. Wang.(2005).Micro-droplets formation during the deliquescence of salt particles in atmosphere.Corrosion,61(12),1167-1172.
MLA	J. Zhang,et al."Micro-droplets formation during the deliquescence of salt particles in atmosphere".Corrosion 61.12(2005):1167-1172.