Table 4: Thermodynamic activation parameters for mild steel in 1 M H2SO4 in the absence and presence of different concentrations of esomeprazole.

Concentration of Inhibitor (ppm) (KJ mol−1) (KJ mol−1) (KJ mol−1)

1 M H2SO475.0518.837201.45
300 ppm103.146.879214.28