Research Article
Biological Behaviour and Enhanced Anticorrosive Performance of the Nitrided Superelastic Ti-23Nb-0.7Ta-2Zr-0.5N Alloy
Table 3
Main corrosion parameters for Ti and bare and nitrided Ti-23Nb-0.7Ta-2Zr-0.5N alloy in Ringer’s solution of different pH values, at 37°C.
| | Material | (A/cm2) | (%) | (m/Y) | Ion release (ng/cm2) | Class | (k cm2) | (%) |
| | Ringer pH = 3.21 | | Ti | 0.74 | — | 8.625 | 876.3 | FS | 11.3 | — | | Bare Ti-23Nb-0.7Ta-2Zr-0.5N | 0.097 | — | 0.868 | 88.19 | PS | 257.9 | — | | Nitrided Ti-23Nb-0.7Ta-2Zr-0.5N | 0.0085 | 91.24 | 0.076 | 7.72 | PS | 784.6 | 32.83 |
| | Ringer pH = 7.58 | | Ti | 0.724 | — | 8.326 | 845.9 | FS | 18.2 | — | | Bare Ti-23Nb-0.7Ta-2Zr-0.5N | 0.031 | — | 0.277 | 28.2 | PS | 351.3 | — | | Nitrided Ti-23Nb-0.7Ta-2Zr-0.5N | 0.0026 | 91.61 |
0.023 | 2.55 | PS | 957.2 | 36.70 |
| | Ringer pH = 8.91 | | Ti | 1.186 | — | 13.7 | 1391.9 | S | 13.9 | — | | Bare Ti-23Nb-0.7Ta-2Zr-0.5N | 0.092 | — | 0.823 | 83.62 | PS | 275.8 | — | | Nitrided Ti-23Nb-0.7Ta-2Zr-0.5N | 0.0081 | 91.20 | 0.073 | 7.42 | PS | 772.1 | 35.72 |
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