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

Table 5

Effect of concentration of 3-benzoylmethyl benzimidazolium hexafluoroantimonate on surface coverage for mild steel in 1.0 M HCl at various temperatures.

Concentration of inhibitor	Temperature/K
	303	313	323	333	343
	Surface coverage 𝜃	Surface coverage 𝜃	Surface coverage 𝜃	Surface coverage 𝜃	Surface coverage 𝜃
1 M HCl + 5×10^−7 M	0.623	0.508	0.428	0.302	0.168
1 M HCl + 5×10^−6 M	0.762	0.636	0.534	0.459	0.344
1 M HCl + 5×10^−5 M	0.894	0.869	0.748	0.637	0.550
1 M HCl + 5×10^−4 M	0.981	0.960	0.945	0.810	0.715