Anticorrosion Activity of 8-Quinoline Sulphonyl Chloride on Mild Steel in 1 M HCl Solution

Table 1

Corrosion parameters values (weight loss studies) for mild steel in the absence and presence of various concentrations of inhibitor in 1 M HCl solution.

Conc. of QSC (ppm)	Weight loss (mg cm^−2)			Corrosion rate (mm y^−1)			Surface coverage (θ)			IE (%) η
	1 h	3 h	6 h	1 h	3 h	6 h	1 h	3 h	6 h	1 h	3 h	6 h
Blank	3.42	12.59	30.14	24.43	29.98	35.88	—	—	—	—	—	—
50	1.80	6.13	12.38	12.86	14.60	14.74	0.4736	0.5130	0.5892	47.36	51.30	58.92
100	1.60	5.02	11.80	11.43	11.95	14.05	0.5321	0.6014	0.6084	53.21	60.14	60.84
150	1.30	4.16	9.30	9.29	9.90	11.07	0.6197	0.6698	0.6915	61.97	66.98	69.15
200	1.03	3.29	6.80	7.36	7.83	8.10	0.6987	0.7388	0.7742	69.87	73.88	77.42
250	0.80	2.70	6.40	5.71	6.43	7.62	0.7663	0.7855	0.7876	76.63	78.55	78.76
300	0.61	2.18	5.56	4.36	5.19	6.62	0.8215	0.8269	0.8155	82.15	82.69	81.55