Baphia nitida Leaves Extract as a Green Corrosion Inhibitor for the Corrosion of Mild Steel in Acidic Media

Table 5

Thermodynamic parameters for the adsorption of BN extract in 1 M H₂SO₄ and 2 M HCl on the mild steel at different temperatures.

Temperature	𝐾 (L/mg)	𝑅^2	Δ𝐺 (kJ/mol)	Δ𝐻 (kJ/mol)	Δ𝑆 (J/mol K)
1 M H2SO4
30	0.194	0.997	−1.028	−26.21	−83.11
40	0.141	0.995	−1.270	−26.21	−79.68
50	0.103	0.994	−1.517	−26.21	−76.45
60	0.076	0.990	−1.772	−26.21	−73.39
2 M HCl
30	0.316	0.999	−0.723	−9.61	−29.33
40	0.241	0.997	−0.921	−9.61	−27.76
50	0.228	0.998	−0.988	−9.61	−26.69
60	0.221	0.999	−1.041	−9.61	−25.73