Enhanced Corrosion Resistance of Recycled Aluminum Alloy 6061 Chips Using Hot Extrusion Followed by ECAP

Table 5

Best fitting parameters obtained from the fitting of the EIS experimental data to a single RC time constant.

Sample	Re	R1	C1	α1	χ^2
	Ω cm^2	kΩ cm^2	μF·cm^−2
E0	2.94	4.916	32.71	0.8525	1.83
E1	5.14	6.075	48.67	0.8062	1.93
E2	5.68	6.961	44.49	0.8006	1.43
E3	4.69	5.643	36.39	0.8408	1.73
E4	5.64	7.738	21.31	0.8744	1.62

The impedance function is given in equation (2).