Investigation of Mild Steel Corrosion in the Cement Production Associated with the Usage of Secondary Fuels

Figure 18

(a) Randles-based equivalent circuit. : electrolytic resistance; : charge-transfer resistance; CPE: constant phase element; Ws: modified Warburg impedance with finite diffusion length. (b) Impedance equation for Ws provided with the parameters , , and acc. to ZView; : imaginary unit; : angular frequency. (c) Measured and fitted curves for 1 M KCl, ambient temperature, aerated, and unstirred conditions. The lowest frequency points were omitted due to scattering. (d) Corresponding fitted parameters.

(a)

(b)

(c)

(d)