The corrosion of tin under thin electrolyte layers containing chloride

The corrosion of tin under thin electrolyte layers containing chloride was investigated by electrochemical measurements and surface characterization. The results show that the corrosion rate increases as the electrolyte layer thickness deceases in the initial stage. Moreover, the corrosion rate under the same electrolyte layer thickness increases firstly and then decreases with the exposure time. In the later stage, the anodic processes under thin electrolyte layers of 50 and 100 μm are inhibited due to the difficult diffusion of dissolved metal ions. The corrosion products formed on tin surface are composed of stannous and stannic oxides and hydroxides.