Corrosion Inhibition Effect of 4-Hydroxy-N′-[(E)-(1H-indole-2-ylmethylidene)] Benzohydrazide on Mild Steel in Hydrochloric Acid Solution

Table 4

Thermodynamic parameters for the adsorption of HIBH on mild steel surface in 1 M HCl acid at different temperatures.

Temp. (°C)	(M^−1)	Slope		(kJ mol^−1)	(kJ mol^−1)	(J mol^−1 K^−1)
30	131248.7	1.090	0.999	39.80	1.77	137.0
40	124518.1	1.083	0.999	40.98
50	135438.6	1.069	0.999	42.53
60	136477.0	1.067	0.999	43.85