Synergetic Effect between Phenolic Extracts of Ammi visnaga and Zea mays Formulation on the Corrosion of Mild Steel in 1 M HCl Solution

Table 1

Electrochemical parameters and inhibiting efficiencies obtained from PP measurements for mild steel in 1 M HCl solution with different concentrations of HE (AV) + HE (ZM) mixture at 298 K.

	Tafel data				S&G data
Cinh (gL^−1)	Ecorr	icorr		ɳpp%	Rp	ɳS&G%
1 M HCl	−416.20	337.10 ± 3.25	147.1	—	82	—
0.01 HE (AV)/0.05 HE (ZM)	−433.79	56.17 ± 2.45	160.1	83.33	300	72.66
0.01 HE (AV)/0.08 HE (ZM)	−431.78	53.66 ± 2.33	184.4	84.08	326	74.84
0.01 HE (AV)/0.10 HE (ZM)	−435.54	43.11 ± 2.31	187.8	87.21	421	80.52
0.01 HE (AV)/0.15 HE (ZM)	−423.75	29.82 ± 1.32	183.8	91.15	950	91.36
0.01 HE (AV)/0.20 HE (ZM)	−439.35	14.24 ± 1.00	224.4	95.77	1272	93.55

Note: E_corr in mVAg/AgCl, 3 M KCl, i_corr in µA cm⁻², |β_c| in mV dec⁻¹, and R_p in Ω cm².