Performance of Methyl-5-Benzoyl-2-Benzimidazole Carbamate (Mebendazole) as Corrosion Inhibitor for Mild Steel in Dilute Sulphuric Acid

Table 4

Potentiodynamic polarization parameters at 60°C.

Inhibitor conc. (g)	Icorr (mA)	Ecorr (mV)	Corrosion rate (mm/yr)	Inhibitor efficiency (%)	Cathodic beta (mV)	Anodic beta (mV)
0.0	−48.08	−427.50	355.32	—	1.47 V	971.45
0.5	−31.23	−384.01	230.81	35.04	469.28	421.72
1.0	−8.82	−385.40	65.22	81.65	224.48	108.94
1.5	−7.24	−396.94	53.54	84.93	222.56	113.70