Research Article
Sealing of PEO Coated AZ91 Magnesium Alloy Using La-Based Solutions
Table 3
Equivalent circuit data for samples sealed with 12 g/l of La(NO3)3 at different temperature and for different treatment times, after PEO treatment.
| | | Untreated | PEO | 12 g/L La
30°C
10 min | 12 g/L La
30°C
30 min | 12 g/L La
40°C
10 min | 12 g/L La
40°C
30 min | 12 g/L La
50°C
10 min | 12 g/L La
50°C
30 min |
| | 23.59 | 24.75 | 23.96 | 24.00 | 25.40 | 25.50 | 25.80 | 24.60 | | 148.70 | 1489.00 | 52.98 | 25.00 | 235.00 | 253.00 | 776.00 | 550.00 | | — | 2672.00 | 4978.00 | 6000.00 | 6264.00 | 5106.00 | 5623.00 | 4944.00 | | — | — | 1178.00 | 534.00 | 800.00 | 7654.00 | 8134.00 | 10305.00 | | 7.90 × 10−6 | 6.20 × 10−5 | 1.60 × 10−6 | 2.70 × 10−6 | 1.60 × 10−5 | 3.37 × 10−5 | 2.30 × 10−5 | 2.44 × 10−5 | | 0.96 | 0.86 | 0.85 | 0.74 | 0.66 | 0.76 | 0.66 | 0.65 | | — | 1.36 × 10−5 | 3.80 × 10−5 | 4.43 × 10−5 | 1.60 × 10−5 | 7.60 × 10−6 | 2.20 × 10−6 | 1.33 × 10−6 | | — | 0.83 | 0.81 | 0.83 | 0.76 | 0.99 | 0.81 | 0.74 | | — | — | 1.10 × 10−6 | 2.36 × 10−5 | 9.80 × 10−5 | 7.68 × 10−5 | 4.13 × 10−5 | 4.14 × 10−7 | | — | — | 0.96 | 0.84 | 0.74 | 0.86 | 0.86 | 0.86 | | Chi squared | 0.0001 | 0.0003 | 0.0003 | 0.0001 | 0.0007 | 0.0001 | 0.0002 | 0.0002 |
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