Table 6: Tafel polarization for the corrosion of mild steel in 1 M H2SO4 in the absence and presence of different concentrations of esomeprazole with the addition of KI.

Inhibitor concentration (ppm)β a (mV) β c (mV) (mV/SCE) (mA/cm2)Linear polarization (R) IE (%)

Blank8.63306.463494.21.406020.5
5010.1686.951473.90.603542.157.08
1009.97905.516454.90.494256.864.85
15011.8545.897502.30.349370.175.16
20011.2325.891465.10.282689.979.90
2508.00106.316516.40.2264134.183.90
30010.9556.847517.80.214211484.76
25 ppm KI13.0946.757508.10.1778122.587.35
50 ppm KI7.50505.898490.00.1120289.792.03