Medium(g/l AYGG) Rp  (Ωcm2) ƒmax(HZ) Cdl (μF/cm2) IE(%)
0.0 28.88 65.55 84.12 -
0.003 88.69 34.71 56.4 67.4
0.02 205.1 13.07 59.4 85.9
0.09 412.4 89.57 43.11 92.9
0.25 655.1 57.72 42.12 95.59
0.3 762.6 20.70 101.07 96.2
Table 3: Impedance parameters of carbon steel in 1 M HCl at room temperature (25±1°C) containing different concentrations of AYGG.