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(Solved): In your experiments, the sample (stainless steel SUS202) was immersed in salt solution (5%) to plot ...
In your experiments, the sample (stainless steel SUS202) was immersed in salt solution (5%) to plot the polarization curve by using the Pentiostat. With calculate corrosion rate by using Tafel method, at the begining, the observed corrosion phenomenon on the surface of steel sample showed that the corrosion rate was fast. However, the corrosion rate would be slowed down after a short time. Why does this phenomenon happen? Explain?