State the use of acid rain in ionic formation of zinc weigh in oxygen by the help of hydrated ferric oxide
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Explanation:
The corrosion behaviors of zinc in bulk-simulated acid solution and under thin electrolyte layer were studied with an occluded cell, which could control the thickness of electrolyte layer. In the bulk-simulated acid rain solution with pH value 2.4-3.8, the electrochemical impedance spec troscopy of zinc consists of a capacitive loop in high frequency and an inductive loop in low frequency, and the control step for corrosion of zinc is charge transfer process. The corrosion rate and corrosion potential of zinc increase with decreasing pH value of solution. When pH of solution was lower (2.4 and 2.7), the hydrogen bubble absorbed on the surface of zinc was formed due to strong hydrogen process, which made more severe corrosion of zinc around bubble than the other surface of zinc, so the circle trace was formed on the surface of zinc. Under thin electrolyte layer, the corrosion process of zinc changed with thinning electrolyte layer, when the thickness of electrolyte was no more than 100 μm, the control step for corrosion of zinc was a mixed process consisting of charge transfer and diffusion, and the cathodic processes were inhibited and the corrosion rate of zinc decreased with decreasing the thickness of electrolyte layer.