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

Table 6

Thermodynamic parameters related to SDS and SDA.

Thermodynamic data
Schiff base inhibitors	Concentration (ppm)	(kJmol^-1)	(kJmol^-1)	(J mol^-1 K^-1)
N,N-bis(Salicylidine)-4,4–diaminostilbene (SDS)	Blank	58.12	53.09	-25.15
	25	73.64	72.37	25.23
	50	75.22	73.89	29.42
	75	77.53	74.94	30.15
	100	81.17	75.57	32.54
N,N-bis(Salicylidine)-4,4diamino azobenzene	25	75.87	72.74	27.71
	50	79.78	74.28	29.94
	75	82.19	75.63	30.74
	100	85.48	77.31	37.56