Table 2.
Fitting result of the electrochemical impedance spectra of unmachined and A-M-µ-EDM machined Mg AZ31B alloy samples (with 0 and 3 g/l APC) in 3.5% NaCl
| R1 | CPE | n | R2 | C | R3 | L | R4 | Rp | |
|---|---|---|---|---|---|---|---|---|---|
| Ohm.cm2 | F.cm− 2.s(n− 1) | Ohm.cm2 | F.cm−2 | Ohm.cm2 | H.cm−2 | Ohm.cm2 | Ohm.cm2 | ||
| Unmachined Mg alloy | 5.60 | 2.32E-4 | 0.73 | 11.2 | 4.15E-3 | 9.13 | 2.27 | 22.39 | 10.65 |
| Mg AZ31B alloy machined with 0 g/l APC | 12.74 | 1.11E-4 | 0.50 | 147.3 | – | – | 52.62 |
308 10 |
99.65 |
| Mg AZ31B alloy machined with 3 g/l APC | 29.28 | 3.97E-5 | 0.71 | 733.7 | – | – | 123.80 | 1299.00 | 468.87 |