Study of Temperature Effect on the Corrosion Inhibition of C38 Carbon Steel Using Amino-tris(Methylenephosphonic) Acid in Hydrochloric Acid Solution

Table 3

Thermodynamic parameters for the adsorption of ATMP on the C38 steel in 1 M HCl at different temperatures.

Temperature (K)	𝑅^2	𝐾ads (M^−1)	Δ𝐺^oads; (kJ mol^−1)	Δ𝐻^oads; (kJ mol^−1)	Δ𝑆^oads; (J mol^−1 K^−1)
30	0.99	666.7	−26.50	−54.87	−95.00
40	0.99	222.2	−24.52
50	0.99	138.9	−24.04
60	0.98	86.9	−23.49