Effect of Pharmaceutically Active Compound Nitroxoline on the Corrosion of Mild Steel in an Acidic Environment

Table 4

AC impedance spectroscopy parameters for mild steel corrosion in 1 M sulphuric acid solution at various concentrations of the inhibitor.

Nitroxoline conc. (ppm)	(cm^2)	(cm^2)	(μF cm^−2)	Surface coverage (θ)	IE (%); η
H2SO4 (blank)	5.303	10.636	2823.2	—	—
50	16.004	32.033	310.61	0.6680	66.80
100	18.298	36.712	237.04	0.7103	71.03
150	20.058	40.180	197.58	0.7353	73.53
200	22.184	44.474	161.40	0.7608	76.08
250	26.105	52.588	115.99	0.7977	79.77
300	35.152	70.499	64.26	0.8491	84.91