PROTECTIVE TECHNOLOGICAL COATING FOR STEELS AND ALLOYS Russian patent published in 2000 - IPC

FIELD: manufacture of silicate materials for protection of steels and alloys from gas corrosion, and preparation of high-grade components having stable mechanical properties. SUBSTANCE: protective technological coating comprises, wt %: SiO₂, 40-75; Al₂O₃, 6-18; CaO, 4-11; MgO, 1-4; B₂O₃, 5-15; Na₂O, 0.5-1; K₂O, 0.3-3; BaO, 5-10; Al₂O₃•3SiO₂, 2-7. EFFECT: greater surface tension, high heat resistance of steels and alloys during high-temperature heating operations and long maintenance periods. 2 tbl