If total cathodic polarization contains the sum of the concentration polarization, what is the effect of concentration polarization on corrosion potential and rate? Show it on the E- log current density diagram! Explain limited current density in 2-3 sentences.

How can you increase the limited current density (or suppress concentration gradient) given by the equation below? Give ways using the equation: i_L=D_z.n.F.C_z/d