Inhibition of Mild Steel Corrosion by 3-Benzoylmethyl Benzimidazolium Hexafluoroantimonate in Acidic Solution

Figure 2

Anodic and cathodic polarization curves of mild steel in an uninhibited 1.0 M HCl solution and in 1.0 M HCl containing various concentrations of 3-benzoylmethyl benzimidazolium hexafluoroantimonate (BMBI) at ambient temperature. (1) 1.0 M HCl; (2) 1.0 M HCl + 5.0×10⁻⁷ M inhibitor; (3) 1.0 M HCl + 5.0×10⁻⁶ M inhibitor; (4) 1.0 M HCl + 5.0×10⁻⁵ M inhibitor; (5) 1.0 M HCl + 5.0×10⁻⁴ M inhibitor.