The invention discloses a testing method for
corrosion resistance of magnesia carbon bricks by adopting a small intermediate-frequency furnace. A sample is
cut into a long strip and bound to the
peripheral surface of a mold core after original size is recorded, and a mold is assembled; a
crucible is prepared through
casting with a
corundum material, maintenance and
drying; a steel block is added for low-temperature baking of the intermediate-frequency furnace after the
crucible is fixed in an
induction coil of the intermediate-frequency furnace; after the steel block is molten, a certain amount of
slag is added, the temperature in the furnace is controlled at 1680 DEG C plus / minus 30 DEG C, counting starts when the
slag is molten completely, and
molten steel and the
slag are poured out after heat is preserved for 120 min; the
crucible is taken out after being completely cooled and is
cut transversely along an
corrosion line, and
corrosion thickness at the corrosion line is measured and compared with the original size; the crucible is knocked open, the sample is taken out and subjected to material
change analysis microscopically. The testing method is simple and direct and has guiding significance in production, research and development work, and advantages and disadvantages of slag corrosion resistance of work-layer
refractory material products adopting different technical formulae and applied to the magnesia carbon bricks or steel ladles can be compared by simulating conditions of actual work sites.