The Effect of Achyranthes aspera Extracts on Mild Steel Corrosion in Industrial Water Medium

Table 2

Activation parameters for MS in industrial water medium in the absence and presence of different concentrations of AA extracts.

𝐶 (ppm)	𝐸^∗𝑎 (kJ mol^−1)	𝑘 (mg cm^−2 h^−1)	Δ𝐻^∗ (kJ mol^−1)	Δ𝐻^∗=𝐸^∗𝑎−𝑅𝑇 (kJ mol^−1)	Δ𝑆^∗ (J mol^−1 K^−1)
0	28.41	9977.06	25.77	25.89	−178.35
200	35.34	66221.65	32.16	32.82	−163.43
400	35.47	65162.84	32.91	32.96	−162.03
600	36.66	93972.33	33.94	34.14	−159.85
800	38.84	181970.1	35.40	36.33	−156.44
1000	39.80	215774.4	36.43	37.28	−154.72
1200	40.11	179060.6	39.23	37.59	−147.77