Table 4. Adsorption Variables for the Inhibition of Mild Steel Corrosion Using DS1, DS2, DS3, and DS4 at 303 K in Acidic Media.

inhibitors	method	R2	slope	intercept	Kads (M–1) × 104	ΔGads (kJ mol–1)
DS1	PDP	0.9997	1.0067	0.0177	5.65	–37.69
	EIS	0.9994	1.0153	0.0317	3.15	–36.21
DS2	PDP	0.9999	1.0184	0.0088	11.36	–39.45
	EIS	0.9999	1.0191	0.0119	8.40	–38.69
DS3	PDP	0.9999	1.0495	0.0257	3.89	–36.75
	EIS	0.9988	1.0332	0.0462	2.16	–35.26
DS4	PDP	0.9997	1.1641	0.0450	2.22	–35.33
	EIS	0.9898	1.1399	0.1994	5.02	–37.39