Table 5 Electrochemical parameters calculated from polarization measurements on copper and brass in 0.4 M NaCl + 0.1 M NaOH without and with 10−3 M of benzimidazole derivatives at 25 °C.
From: Recent advances in the use of benzimidazoles as corrosion inhibitors
|  | Ecorr Ag/AgCl (V) | − βc (mV dec−1) | -βa (mV dec−1) | Icorr (μA cm−2) | IE (%) |
|---|---|---|---|---|---|
Copper | |||||
 Blank | − 0.194 | 324 | 286 | 41.0 | – |
 44 | − 0.153 | 206 | 196 | 3.67 | 91.0 |
 45 | − 0.168 | 219 | 291 | 12.0 | 71.0 |
Brass | |||||
 Blank | − 0.437 | 483 | 136 | 118.0 | – |
 44 | − 0.225 | 187 | 144 | 2.97 | 97.4 |
 45 | − 0.200 | 232 | 116 | 9.1 | 92.0 |