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

Table 5

Weight loss data related to SDS and SDA.

Weight loss data
Inhibitor	Temperature (K)	Concentration (ppm)	Weight loss (mg)	C.R. (mmpy)	μWL%	Θ
N,N-bis(Salicylidine)-4,4–diaminostilbene (SDS)	303	Blank	128.7	197.0	—	—
		25	36.0	55.1	72	0.72
		50	30.9	47.3	76	0.76
		75	25.7	39.4	80	0.80
		100	21.9	33.5	83	0.80
	313	Blank	288.0	440.8	—	—
		25	99.6	152.5	63	0.63
		50	90.8	139.0	65	0.65
		75	79.1	121.1	68	0.68
		100	67.4	103.1	72	0.73
	323	Blank	578.2	884.9	—	—
		25	242.8	371.6	56	0.56
		50	221.7	339.2	59	0.59
		75	203.7	311.7	64	0.64
		100	185.7	284.2	67	0.67
	333	Blank	989.7	1514.6	—	—
		25	445.4	681.6	51	0.51
		50	425.6	651.3	54	0.54
		75	386.0	590.7	57	0.57
		100	356.3	545.3	62	0.62
N,N-bis(Salicylidine)-4,4-diamino azobenzene (SDA)	303	25	33.5	51.2	75	0.75
		50	25.7	39.4	80	0.80
		75	21.9	33.5	83	0.83
		100	18.0	27.6	86	0.86
	313	25	87.9	134.5	68	0.68
		50	76.2	116.6	70	0.70
		75	67.4	103.1	73	0.73
		100	58.6	89.7	76	0.76
	323	25	219.7	336.3	59	0.59
		50	202.4	309.7	64	0.64
		75	185.0	283.2	67	0.67
		100	150.3	230.1	72	0.72
	333	25	425.6	651.3	54	0.54
		50	376.1	575.6	57	0.57
		75	346.4	530.1	61	0.61
		100	306.8	469.5	66	0.66