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

Codes	R ct (Ω cm2)	C dl (μF cm−2)	R s (Ω cm2)	η%
Blank	128.6	132.2	8.799	0.00
Fcua	1630.0	418.6	18.53	92.11
Fcub	2390.0	411.0	19.32	94.61
Fcuc	3198.0	217.2	25.27	95.97