Table 6.

Fitting results of the EIS data of the NP, CSP, and SSP steels.

Sample	Rs (Ω.cm2)	Rsc (Ω.cm2)	CPEsc (F.cm−2.sn−1)	n	Rb (Ω.cm2)	Cb (F.cm−2)	χ2 × 10−3
NP	144.1	29356	7.2E-05	0.8	8954	2.9 × 10−4	<1
CSP	109.7	53917	5.1E-05	0.92	7675	1.3 × 10−4	<4
SSP	113.4	23209	4.1E-05	0.71	1213	1.6 × 10−4	<2