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

Table 2

Predicted weight loss (g) results of mild steel in the presence of small quantities of MBZ in dilute H₂SO₄.

Exposure time (h)	Inh. conc. (g/l)	Weight loss (g)	Corrosion rate (mm/yr)	Inhibition efficiency (%)
24	0.05	3.01	1.89	16.86
48	0.05	3.44	1.58	16.60
72	0.05	4.07	1.13	15.41
96	0.05	4.89	1.28	15.32
120	0.05	5.90	1.95	16.27
24	0.1	2.76	1.60	31.32
48	0.1	3.17	1.34	30.93
72	0.1	3.78	0.93	29.61
96	0.1	4.58	1.11	29.42
120	0.1	5.58	1.77	30.26
24	0.2	2.28	1.11	55.04
48	0.2	2.65	0.94	54.42
72	0.2	3.23	0.60	52.91
96	0.2	3.99	0.82	52.52
120	0.2	4.96	1.47	53.16
24	0.3	1.83	0.73	72.71
48	0.3	2.17	0.65	71.92
72	0.3	2.71	0.37	70.24
96	0.3	3.45	0.62	69.70
120	0.3	4.37	1.26	70.17
24	0.4	1.42	0.45	85.31
48	0.4	1.73	0.43	84.39
72	0.4	2.23	0.21	82.60
96	0.4	2.93	0.49	81.93
120	0.4	3.83	1.11	82.26