Table 4 EIS spectra equivalent circuit modelling data of pure zinc and zinc alloy (Zn-5 Al-4 Mg).
Immersion Time | Rf (Ω∙cm2) (x 102) | CPEf (Ω−1∙cm−2∙s−n) (x 10−5) | n | Rt (Ω∙cm2) (x 102) | CPEdl (Ω−1∙cm−2∙s−n) (x 10−5) | n | RL (Ω∙cm2) (x 102) | L (Ω∙cm2∙s) | W (Ω−1∙cm−2∙s−0.5) (x 102) | Rp (Ω∙cm2) (x 102) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
Pure Zn | 2 h | 0.88 ± 0.09 | 1.40 ± 0.18 | 0.87 | 1.62 ± 0.1 | 2.09 ± 0.14 | 0.85 | 9.58 ± 0.47 | 109 ± 7.317 | — | 2.5 ± 0.17 |
1d | 0.91 ± 0.06 | 0.79 ± 0.29 | 0.8 | 2.27 ± 0.35 | 4.29 ± 0.32 | 0.86 | — | — | — | 3.19 ± 0.43 | |
2d | 0.97 ± 0.02 | 0.75 ± 0.2 | 0.99 | 2.9 ± 0.2 | 4.73 ± 0.87 | 0.81 | — | — | — | 3.87 ± 0.29 | |
3d | 0.96. ± 0.01 | 0.71 ± 0.1 | 1 | 5.93 ± 0.46 | 6.65 ± 1.06 | 0.69 | — | — | — | 6.9 ± 0.5 | |
Zn Alloy | 2 h | 0.83 ± 0.06.45 | 5.86 ± 2.11 | 0.74 | 3.25 ± 0.55 | 607.12 ± 69.61 | 0.32 | — | — | — | 4.08 ± 0.5 |
1d | 2.26 ± 0.76 | 13.27 ± 1.07 | 0.69 | 3.36 ± 0.42 | 899.67 ± 234.09 | 0.63 | — | — | — | 5.63 ± 1.26 | |
2d | 2.89 ± 1 | 8.11 ± 1.09 | 0.79 | 11.68 ± 0.78 | 283.10 ± 38.15 | 0.36 | — | — | 3.14 ± 0.49 | 14.57 ± 1.75 | |
3d | 2.17 ± 0.3 | 51.26 ± 17.33 | 0.18 | 26.82 ± 1.83 | 21.41 ± 3.61 | 0.79 | — | — | 0.08 ± 0.01 | 28.99 ± 2.04 |
