Abstract
The influence of temperature and water vapor on the high temperature oxidation of alloy 282 was investigated. The corrosion products were characterized using X-ray diffraction, scanning electron microscope and focused-ion beam. The results show that the oxidation kinetics in flowing-air and steam follow the power law. External oxide scale was composed of TiO2 and Cr2O3, while the corrosion product for the internal oxide consisted of TiO2, Cr2O3 and Al2O3. Both temperature and water vapor can accelerate the oxidation rate. The coupling effect of the release and permeability of hydrogen and evaporation of chromium oxy-hydroxides are responsible for the severe oxidation of alloy 282 in steam.
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