Table 4 Electrochemical impedance parameters.

From: Nanoengineered t-ZrO2 coatings for superior corrosion resistance on steel surfaces

System

Nyquist plot

IE (%)

Rct (Ω cm2)

Cdl (F/cm2)

Impedance log (Z/Ω)

MS + H2SO4

1769

2.090 × 10−8

713.6

MS + H2SO4 + 0.2 M ZrO2 NPs

14,715

0.631 × 10−8

17,729.02

88.2