A Characteristic Investigation of Aminocyclohexane-N′-methylurea as a Corrosion Inhibitor for Mild Steel in 1 N H₂SO₄

Table 4

Data obtained from Langmuir adsorption isotherm for mild steel in 1 N sulphuric acid with ACMU in the temperature range of 303–333 K.

Temperature K	Free energy change (Δ𝐺ads) KJ/mol	Entropy of adsorption (Δ𝑆ads) J/mol/K	Enthalpy of adsorption (Δ𝐻ads) KJ/mol
303	−26.34	−13.79	−30.51
318	−27.64	−9.04	−30.51
333	−28.94	−4.71	−30.51