. 2017 Nov 29;2(11):8421–8437. doi: 10.1021/acsomega.7b01385

Table 3. EIS Parameters for Mild Steel in 5% HCl in the Absence and Presence of Different Concentrations of ZnO/PEG, ZnO/PVP, and ZnO/PAN.

inhibitor	concentration (ppm)	R_s (Ω cm²)	R_ct (Ω cm²)	n	Y₀ (μΩ sⁿ cm^–2)	C_dl (μF cm^–2)	_χ²	η_EIS (%)
blank	0	1.17	17.0	0.886	425	225.31	0.93782
ZnO/PEG	100	1.44	48.5	0.882	226	123.54	0.83012	64.95
	300	1.39	51.3	0.880	221	119.94	0.84808	66.86
	500	1.49	54.0	0.879	211	113.93	0.81760	68.52
	700	1.72	57.0	0.892	186	107.24	0.87970	70.18
	1000	1.52	58.0	0.882	197	108.29	0.80383	70.69
ZnO/PVP	100	1.37	83.9	0.826	171	69.91	1.52870	79.74
	300	0.97	109.0	0.828	154	65.90	1.08390	84.40
	500	2.16	139.0	0.839	126	57.98	1.42690	87.77
	700	1.24	143.0	0.839	127	57.52	0.92192	88.11
	1000	1.38	185.0	0.831	120	55.31	1.06700	90.81
ZnO/PAN	100	1.38	24.6	0.879	308	157.22	0.84234	30.89
	300	1.47	39.6	0.888	271	152.99	1.36560	57.07
	500	1.26	53.3	0.891	270	160.75	1.45950	68.11
	700	1.08	58.2	0.897	284	177.34	1.11630	70.79
	1000	2.47	93.0	0.877	202	143.25	1.49320	81.72
PEG	1000	1.78	56.1	0.882	210	115.91	0.99105	69.70
PVP	1000	4.13	142.0	0.857	93	45.16	1.06360	88.03
PAN	1000	2.23	85.4	0.883	218	128.60	1.52310	80.09