Table 3 Donor concentration (ND), the vacancy diffusion coefficient (DO) and the flux of the vacancies caused by potential gradient (JP) of passive film formed on Ti-6Al-4V alloy prepared by EB-PBF at different film formation potential in ASS at 37 °C
Samples | Passive film forming potential (V vs SCE) | |||||
|---|---|---|---|---|---|---|
0.6 | 0.7 | 0.8 | 0.9 | 1.0 | ||
ND (1019 /cm3) | A0 | 7.04 | 5.97 | 5.47 | 5.12 | 4.96 |
A90 | 6.97 | 5.99 | 5.38 | 5.02 | 4.74 | |
B0 | 6.73 | 5.63 | 5.13 | 4.73 | 4.55 | |
B90 | 6.70 | 5.59 | 5.02 | 4.65 | 4.41 | |
DO (10−19 m2/s) | A0 | 2.57 | 2.64 | 3.02 | 3.52 | 4.19 |
A90 | 4.60 | 5.16 | 7.49 | 7.49 | 10.41 | |
B0 | 7.89 | 8.50 | 8.75 | 9.47 | 10.37 | |
B90 | 12.45 | 13.85 | 14.91 | 16.92 | 20.44 | |
JP (10−2 m2/s) | A0 | 1.15 | 1.18 | 1.24 | 1.35 | 1.55 |
A90 | 2.40 | 2.22 | 2.14 | 2.70 | 3.54 | |
B0 | 3.97 | 3.44 | 3.22 | 3.22 | 3.39 | |
B90 | 6.24 | 5.56 | 5.38 | 5.66 | 6.48 | |
