FIELD: protective coatings. SUBSTANCE: composition for erosion-resistant coatings for porous oxide materials includes 75-85% of apatite flotation slime and 15-25% of manganese borate additive, the former being composed of, wt %: silicon oxide 40.6-41.7, aluminum oxide 22.1-23.0, iron oxide 5.5-6.0, titanium dioxide 3.6-4.0, calcium oxide 4.7-5.3, sodium oxide 12.6-13.8, potassium oxide 5.6-6.3, and phosphorus pentoxide 2.4-2.8. Coating is formed at 900 C for 15 min and preserves its properties at 900 C for more than 150 hr. EFFECT: reduced cost. 3 tbl
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