Abstract
The corrosion mechanism of novel MgO–Al3BC3 refractories in contact with converter slag was investigated. Results demonstrated that refractories with an optimized Al3BC3–Al composition exhibited significantly reduced corrosion index compared with low–carbon MgO–C refractories. The superior corrosion resistance was primarily attributed to the formation of a dense protective layer composed of MgO–MgAl2O4–Mg3B2O6, which was achieved at 1100 °C by combining Al3BC3–Al. These protective layers with enhanced diffusion barriers effectively impedes the penetration and solid solution of Ca and Fe ions, thereby also optimizing the slag viscosity. The self–healing capability of the novel MgO–Al3BC3 refractories further enhances their corrosion resistance.
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