Research was focused on slag corrosion mechanism of high chrome bricks used for different types of gasifier by comparing the structure of high chrome bricks for petroleum coke gasifier and water-coal slurry gasifier with slag corroded test ing brick and water coal slurry gasifier through Scanning Electron Microscope （S EM） examination and X-ray diffraction. Results show that for high chrome brick used for petroleum coke gasifier, corrosion is mainly caused by Cr2O3 in the brick and V2O5 in molten slag and liquid phase generation at low temperatur e; for high chrome brick used for water-coal slurry gasifier, corrosion is caus ed by dissolution of Cr2O3 in molten slag and corrosion of ZrO2. For LIRR -HK95 brick, it performs better petroleum coke corrosion resistance than the ot hers due to the optimal composition and structure.
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