Table 1 Corrosion products forming on the bare samples and the pre-oxidized samples after hot corrosion.
Samples | Environment | Corrosion time | |||
|---|---|---|---|---|---|
1 h | 5 h | 20 h | 100 h | ||
Bare samples | NaCl + H2O + O2 | – | – | TiO2, Na4Ti5O12 | – |
Pre-oxidized samples | NaCl + H2O + O2 | TiO2, Ti2O | TiO2, Ti2O, Na4Ti5O12 | TiO2, Ti2O, Na4Ti5O12 | – |
NaCl + O2 | – | TiO2, Ti2O | TiO2, Ti2O, Na4Ti5O12 | – | |
H2O + O2 | – | – | – | TiO2 | |
O2 | – | – | – | TiO2 | |