Electrochemical parameters extracted from the equivalent circuit fits for aluminum alloy in the absence and presence of the inhibitors.

Code	Conc. (ppm)	R ct (Ω cm2)	C dl (μF)	R s (Ω cm2)	η%
Blank	—	317.8	398.29	3.60	—
UA	50	723.0	352.54	6.03	6.04
	100	998.0	221.28	8.19	8.15
UB	50	1227	210.68	8.57	3.93
	100	1250	202.52	6.55	4.57
UC	50	2740	92.39	0.00	8.40
	100	3750	67.0	5.01	1.52