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Coal-ash Corrosion of Monolithic, Silicon Carbide-based Refractories
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Several silicon carbide-based monolithic refractories were subjected to static coal ash corrosion tests to determine corrosion mechanisms and rates. Two castale refractories with 75% and 85% SiC were exposed to two types of coal ash at temperatures from 1090℃ to 1430℃. Several plastic refractories were exposed to a high-calcium coal ash at 1430℃ for over 100 hours. Optical microscopy and scanning electron microscopy with energy-dispersive x-ray analysis were used to determine the corrosion mechanisms and rates of these materials.
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