Table 5 VO leaf extract thermodynamic adsorption parameters at varying temperatures on CS surface in 0.5 M H2SO4.

From: Verbena officinalis (VO) leaf extract as an anti-corrosion inhibitor for carbon steel in acidic environment

T, K

log Kads

− ∆Goads,kJ mol−1

− ∆Hads, kJ mol−1

− ∆Sads, J mol−1K−1

298

303

308

313

318

4.9

5.31

5.87

6.04

6.5

38.1

40.9

44.9

46.6

50.1

117.3

526

522

526

523

526

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