Abstract
The aluminide coating was prepared on Inconel 783 bolts by pack cementation for ultra-supercritical steam turbine application. The oxidation behavior of the coating and 783 alloy at 650–800 °C for 3850 h was investigated including temperature dependence of oxidation kinetics and composition of oxide scales. Results show that bare 783 alloy is unable to grow external alumina below 750 °C due to its insufficient Al content and thus shows a bell-shaped oxidation kinetics dependent on temperature. However, 2.9 µm aluminide coating is sufficient for protection of In 783 bolts.
| Original language | English |
|---|---|
| Article number | 110033 |
| Journal | Corrosion Science |
| Volume | 196 |
| DOIs | |
| State | Published - Mar 2022 |
Keywords
- Aluminide coating
- In 783 bolts
- Oxidation kinetics