Table 3 Thermodynamic parameters derived and calculated based on Langmuir plots.

From: An efficient green ionic liquid for the corrosion inhibition of reinforcement steel in neutral and alkaline highly saline simulated concrete pore solutions

Temperature, K

Kads (L mole−1)

\(\Delta G_{ads}^{o}\)(kJ mol−1)

\(\Delta H_{ads}^{o}\)(kJ mol−1)

\(\Delta S_{ads}^{o}\)(J. mol−1 K−1)

pH 7

147,000

− 38.8

–

–

pH 9

152,000

− 38.8

–

–

pH 12 (293 K)

170,000

− 39.1

9.81

− 166.98

pH 12 (303 K)

149,000

− 40.1

9.81

− 164.74

pH 12 (313 K)

126,000

− 41.0

9.81

− 162.34

pH 12 (323 K)

119,000

− 42.2

9.81

− 160.90

Back to article page