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

Table 3

PDP parameters of N,N-bis(salicylidine)-4,4–diaminostilbene (SDS) and N,N-bis(salicylidine)-4,4’–diaminoazobenzene(SDA).

Tafel data
Inhibitor	Concentration (ppm)	OCP (mV)	- (mV vs. SCE)	(mA cm^-2)	(mV dec^-1)	(mV dec^-1)	μp%
SDS	0	-796.5	741	4.091	179	65	—
	25	-805.8	769	1.105	201	68	73
	50	-810.6	778	1.023	209	69	75
	75	-815.9	781	0.859	212	72	79
	100	-821.8	790	0.736	215	74	82
SDA	25	-810.9	780	0.941	211	76	77
	50	-817.3	785	0.859	214	78	79
	75	-818.8	788	0.736	216	82	82
	100	-823.2	792	0.532	221	89	87