Table 2 Values of impedance parameters for Fe and Fe-PEI samples before and after corrosion.

From: Interaction of thin polyethyleneimine layer with the iron surface and its effect on the electrochemical behavior

Impedance parameter

Fe

Fe-PEI

Before corrosion

After corrosion

Before corrosion

After corrosion

Rct (Ω)

13.9

19.04

8.25

10.13

Qdl (µF)

0.70

1.28

2.82

1.44

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