Abstract
The saturated vapor oxidation behavior of GH2984 alloys at 750 °C were investigated by oxidation weight increasing method, X-ray diffraction and scanning electronic microscopy in different dissolved oxygen concentrations. The results show that the oxide film of GH2984 alloys in different dissolved oxygen concentrations is of a single layer consisting of continuous Cr2O3. The oxidation mass gain of GH2984 alloys slightly increases with the increase of the dissolved oxygen concentrations in water vapor. Oxygenated treatment could accelerate the internal oxidation phenomenon, enhance the oxidation film thickness and make the scattered nodular bulges of Fe2O3 disappear and more Cr-rich nodular bulges form. Moreover, high dissolved oxygen concentrations do not affect the stabilization of Cr2O3 but contribute to the formation of a little Al2O3 and TiO2 which are oxidized internally.
Published Version
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