Table 6 Corrosion parameters obtained from potentiodynamic polarization measurements of mild steel in 1 M HCl at different inhibitor concentrations 6a and 6b at 298 K.
Inhibitor | C (ppm) | Βa (mV dec−1) | Βc (mV dec−1) | Icorr (uA) | Ecorr vs. SCE (mV) | K (mpy) | Chi squared | θ | IE PDP% |
|---|---|---|---|---|---|---|---|---|---|
Blank | – | 313 | 184 | 4180 | − 339 | 1911.000 | 85.36 | – | – |
6a | 50 | 203 | 275 | 410 | − 419 | 187.400 | 49.58 | 0.902 | 90.191 |
100 | 208 | 298 | 300 | − 428 | 136.900 | 77.47 | 0.928 | 92.823 | |
200 | 205 | 307 | 259 | − 425 | 118.100 | 77.53 | 0.938 | 93.804 | |
500 | 222 | 296 | 224 | − 427 | 102.400 | 94.08 | 0.946 | 94.641 | |
6b | 50 | 350 | 263 | 276 | − 424 | 126.100 | 111.2 | 0.934 | 93.397 |
100 | 323 | 230 | 250 | − 424 | 113.400 | 86.81 | 0.940 | 94.019 | |
200 | 317 | 270 | 177 | − 418 | 80.710 | 92.45 | 0.958 | 95.766 | |
500 | 318 | 260 | 140 | − 413 | 63.740 | 58.68 | 0.967 | 96.651 |
