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Citation: ZHANG Ji-biao, WANG Jia, WANG Yan-hua. Phenomenon of Micro-droplets Formation on Metals during the Deliquescence of Salt Particles in Atmosphere[J]. Acta Physico-Chimica Sinica, ;2005, 21(09): 993-996. doi: 10.3866/PKU.WHXB20050910 shu

Phenomenon of Micro-droplets Formation on Metals during the Deliquescence of Salt Particles in Atmosphere

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071； 2Graduate School of the Chinese Academy of Sciences, Beijing 100049； Zhanjiang Ocean University, Zhanjiang 524088； Ocean University of China, Qingdao 266003； State Key Laboratory for Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang 110016

Received Date: 13 January 2005
Available Online: 15 September 2005

The characteristics of the formation of micro-droplets were investigated in a humidity-controlled chamber. The results showed that the micro-droplets formation had a close relation with the atmospheric corrosion of metal based on the pH and potential distributions of micro-droplets. Micro-droplets could only appear on high potential area in a corrosive combination of metals and salt particles. Meanwhile, a high value of pH was found in the areas covered with micro-droplets. The formation of micro-droplets needed two premises, one was that the relative humidity should be over the saturated relative humidity of main-droplet, the other was that the metal substrate could be eroded under the main-droplet.
- Micro-droplets;Relative humidity;Potential distribution; Atmospheric corrosion
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