Table 2. Parameters Obtained from the Potentiodynamic and Linear Polarization of Mild Steel in 5% HCl in the Presence and Absence of Different Concentrations of Additives.

		PDP					LPR
inhibitor	inhibitor conc. (ppm)	–Ecorr (mV)	icorr (μA/cm2)	βa (mV/dec)	βc (mV/dec)	ηPDP (%)	Rp (Ω cm2)	ηLPR (%)
blank	0	445.05	655.25	118.95	89.77		33.91
ZnO/PEG	100	419.35	244.23	114.12	74.27	62.73	80.00	57.61
	300	430.27	231.90	103.72	72.88	64.61	80.16	57.70
	500	430.42	210.28	103.93	67.93	67.91	84.84	60.00
	700	428.41	208.50	116.17	67.17	68.18	88.65	61.75
	1000	428.53	200.31	115.31	69.95	69.43	94.40	64.08
ZnO/PVP	100	433.27	205.52	106.23	86.12	68.64	100.50	66.26
	300	430.95	204.38	125.80	83.94	68.81	106.98	68.30
	500	419.66	184.11	125.83	74.31	71.90	110.20	69.23
	700	416.66	176.04	130.37	71.04	73.13	113.34	70.08
	1000	414.12	167.06	115.40	71.27	74.50	114.53	70.39
ZnO/PAN	100	448.34	380.28	149.65	76.92	41.96	57.95	41.48
	300	451.73	237.96	150.34	78.14	63.68	93.83	63.86
	500	450.16	191.61	146.24	73.70	70.76	111.07	69.47
	700	451.09	138.19	133.30	64.77	78.91	137.00	75.25
	1000	467.79	108.67	123.13	64.30	83.42	168.82	79.91