Inhibition of Mild Steel Corrosion in Sulphuric Acid Using Esomeprazole and the Effect of Iodide Ion Addition

Table 5

Electrochemical impedance parameters for mild steel in 1 M H₂SO₄ containing different concentrations of esomeprazole with the addition of KI.

Inhibitor concentration; (ppm)	𝑅Ct (Ω cm^2)	𝐶dl (μF cm^−2)	I.E 𝜂 (%)
Blank	13.67	1656.9	—
50	44.746	153.8	69.45
100	48.623	134.58	71.89
150	53.798	110.93	74.59
200	56.90	96.86	75.98
250	59.582	87.18	77.06
300	66.291	71.77	79.38
25 ppm KI	68.499	66.6	80.04
50 ppm KI	86.567	41.83	84.21