Abstract
The time-dependent corrosion rate, droplet height, volume loss and contact angle were monitored during the course of evaporation of a single droplet of NaCl on zinc surface. The results show that contact angle and droplet height decrease linearly with increasing droplet holding time, while volume loss increases. Experimental results indicated that the outmost surface of the droplet is fixed during the last stage of evaporation without changing the location of edge. The evaporation process of a single droplet can be divided into two stages. It begins from the droplet surface and continued during the second drying stage with increasing the amount of corrosion products. The mechanism zinc corrosion under a single droplet of NaCl will be proposed and discussed.