Research Article
Fabrication of Coatings on the Surface of Magnesium Alloy by Plasma Electrolytic Oxidation Using ZrO2 and SiO2 Nanoparticles
Table 4
Calculated parameters of the elements of equivalent electrical circuits (
,
, Ω·cm
2;
, S·cm
−2·s
) for the samples.
| | Type of sample surface | | | CPE1 | | CPE2 | | | | |
| | Bare Mg | 1.8 × 103 | — | — | — | 4.8 × 102 | 3.3 × 10−5 | 0.85 | | PEO layer | 5.4 × 104 | 8.37 × 103 | 4.64 × 10−7 | 0.68 | 5.21 × 104 | 2.63 × 10−6 | 0.75 | | PEO layer with ZrO2 nanopowder | 1.8 × 106 | 5.94 × 104 | 6.66 × 10−8 | 0.83 | 1.45 × 106 | 5.92 × 10−8 | 0.83 | | PEO layer with SiO2 nanopowder | 5.6 × 104 | 8.50 × 103 | 2.37 × 10−7 | 0.76 | 6.85 × 104 | 9.88 × 10−7 | 0.76 |
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