Table 4.
Ti substrates subjected to concentrated H2SO4 etching [109].
| TiO2 + H2SO4 → Ti(SO4)2 + 2H2O | (1) |
| Ti + 2H2SO4 → Ti(SO4)2 + 2H2 | (2) |
| Ti + H2 → TiH2 | (3) |
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