HEAT-RESISTANT COATING Russian patent published in 2001 - IPC

FIELD: machine building, more particularly materials for protection of heat-resistant nickel alloys from destruction affected by gas corrosion. SUBSTANCE: heat-resistant coating comprises, wt %: SiO₂, 38.0-52.6; B₂O₃, 6.0-7.5; Al₂O₃, 18.0-20.0; BaO, 7.0-9.0; CaO, 3.5-7.5; MgO, 0.9-2.0; TiO₂, 2.5-4.0; Cr₂O₃, 4.0-5.5; SiO₂-based complex mineral compound, 5.5-6.5. SiO₂ based complex compound comprises, wt %: SiO₂, 56.25-58.05; AL₂O₃, 34.50-35.10; CaO, 1.0-1.2; MgO 1.0-1.1; K₂O, 2.5-2.6; Na₂O 0.6-0.7; TiO₂, 1.6-1.8; SO₃, 0.15- 0.25; Fe₂O₃, 0.8-1.0 or SiO₂ 35.25-40.05; Al₂O₃, 34.30-35.10; CaO, 1.0-1.2; MgO, 1.0-1.1; K₂O, 2.5-2.6; Na₂O, 0.6-0.7; TiO₂, 1.6-1.8; SO₃, 0.15-0.25; Fe₂O₃, 0.8-1.0; SiB₄, 18.0-21.0. EFFECT: improved properties of the heat- resistant coatings. 3 tbl