Table 8 Electrochemical parameters of impedance for mild steel corrosion in absence and presence of optimum concentration of inhibitor at different rotation speeds
Rotation speed (rpm) | Concentration (ppm) | Rs(ohm.cm2) | Rct(ohm.cm2) | p(μFcm−2) | n | Cdl(μFcm−2) | θ | η% |
|---|---|---|---|---|---|---|---|---|
500 | Blank | 0.91 | 8.7 | 600 | 0.92 | 380 | 0.61 | 61 |
600 | 1.9 | 22 | 200 | 0.89 | 102 | |||
1,000 | Blank | 1 | 8.9 | 500 | 0.93 | 333 | 0.70 | 70 |
600 | 3.3 | 30 | 171 | 0.89 | 89 | |||
1,500 | Blank | 1.2 | 11 | 400 | 0.95 | 301 | 0.80 | 80 |
600 | 1.8 | 55 | 112 | 0.90 | 64 | |||
2,000 | Blank | 1.3 | 11.4 | 300 | 0.96 | 337 | 0.24 | 24 |
600 | 1.1 | 15.1 | 300 | 0.87 | 134 |