Table 3.

EIS parameters for M-steel/1 M HCl/NSQN & CSQN systems at 303 K.

Medium	CoConc. (M)	Rp (Ω cm2)	n	Q×104 (Sn Ω−1 cm−2)	Cdl (μF/cm2)	ERp (%)	θ
Blank	1	20.5 ± 0.05	0.900 ± 0.06	2.061 ± 0.580	104.8	—	—
NSQN	10–3	5770 ± 0.8	0.810 ± 0.07	0.619 ± 0.020	28.3	96.4	0.964
	10–4	356 ± 0.6	0.790 ± 0.06	0.882 ± 0.058	35.5	94.2	0.942
	10–5	158 ± 0.4	0.760 ± 0.05	1.491 ± 0.169	46.1	87.3	0.873
	10–6	140 ± 0.7	0.740 ± 0.09	1.670 ± 0.120	47.7	85.0	0.850
CSQN	10–3	279 ± 0.7	0.790 ± 0.08	0.991 ± 0.420	38.2	92.8	0.928
	10–4	192 ± 0.5	0.782 ± 0.09	0.999 ± 0.231	39.6	89.3	0.893
	10–5	125 ± 0.6	0.771 ± 0.05	1.359 ± 0.011	40.2	83.6	0.836
	10–6	64.0 ± 0.8	0.774 ± 0.04	1.987 ± 0.411	53.9	67.9	0.679