Inhibition Behaviour of Some Isonicotinic Acid Hydrazides on the Corrosion of Mild Steel in Hydrochloric Acid Solution

Table 3

Thermodynamic parameters for adsorption of INIMH and INPMH on MS in 0.5 M HCl at different temperatures.

Inhibitor	𝑇 (°C)	𝑅^2	𝐾ads (L mol^−1)	Δ𝐺^∘ads (kJ mol^−1)	Δ𝐻^∘ads (kJ mol^−1)	Δ𝑆^∘ads (J mol^−1 K^−1)
INIMH	30	0.995	8928.57	−33.04
	40	0.990	8474.57	−33.99	0.529	7.339
	50	0.990	7812.50	−34.86
	60	0.994	7575.76	−35.85
INPMH	30	0.995	8695.65	−32.97
	40	0.990	8196.72	−33.91	0.518	7.344
	50	0.990	7575.75	−34.78
	60	0.994	7407.40	−35.79