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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) a (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