Acid Corrosion Inhibition and Adsorption Behaviour of Ethyl Hydroxyethyl Cellulose on Mild Steel Corrosion

Table 4

Impedance and polarization parameters for mild steel in 0.5 M H₂SO₄ in the presence and absence of EHEC and EHEC + KI.

System	Impedance data				Polarization data
	𝑅ct	𝑛	I.E. %	𝐶dl (uF cm^−2) × 10^−3	𝐸corr (mV (SCE))	𝑅𝑝 (Ω cm^2)	I.E. %
Blank	11.931	0.889	—	14.65	−468.35	16.27	—
EHEC	37.502	0.876	68.19	5.13	−477.87	58.04	71.97
EHEC + KI	133.37	0.854	91.05	2.41	−489.10	177.51	90.83