Effect of coal ash on the performance of alloys in simulated oxy-fuel environments

- Long-term performances of alloys in oxy-fuel environment with ash at 750 °C were evaluated.
- Two stages were found for ash corrosion: incubation stage and rapid corrosion stage.
- Mo, W, and Nb in alloys reduce the incubation time.
- Severe carburization was observed after incubation time in oxy-fuel environment with high CO2 content.
- The corrosion rates in an oxy-fuel environment were higher than or close to the rates in an air combustion environment.