On the sulfation reaction of protective and transient oxides at 650 °C and its role in the low temperature hot corrosion mechanism
Source abstract
Abstract
MxOy-Na2SO4 (with M = Ni, Cr, Fe, Al, Ti, Nb) and NiSO4-Na2SO4 mixtures were prepared and their reactivity was examined at 650°C in air + SO2 (400 and 1000 ppm). The formation of a molten phase for NiSO4-Na2SO4 mixtures and the rapid sulfation of NiO in these conditions were demonstrated. NiO sulfation should be considered when explaining the Type II hot corrosion attacks. Cr2O3, Fe2O3 and Al2O3 also react with the gas phase showing these oxides dissolved according to an acidic-fluxing mechanism in air + SO2/SO3 (400 and 1000 ppm) environments. Al2O3 is more soluble than Cr2O3 in these conditions.
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Research context
OpenAlex topics: Metallurgical Processes and Thermodynamics · High-Temperature Coating Behaviors · Thermal and Kinetic Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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