Evaluation of Corrosion Inhibition Efficiency of Aluminum Alloy 2024 by Diaminostilbene and Azobenzene Schiff Bases in 1 M Hydrochloric Acid

Table 7

Thermodynamic parameters related to SDS and SDA.

Thermodynamic adsorption parameters
Schiff base inhibitor	Concentration (ppm)	Temperature (K)	(10^3 M^-1)	(kJmol^-1)	(kJmol^-1)	(Jmol^-1)
N,N-bis(Salicylidine)-4,4–diaminostilbene (SDS)	100	303	15.8	-34
		313	11.2	-34
		323	8.34	-35	29.2	203
		333	6.56	-35
N,N-bis(Salicylidine)-4,4-diamino azobenzene (SDA)	100	303	24.7	-35
		313	17.3	-35
		323	11.5	-36	30.6	207
		333	9.6	-36