ENAMEL "STAVAN" Russian patent published in 2003 - IPC

FIELD: corrosion protection. SUBSTANCE: invention provides silicate enamel for domestic- and technical-destination steel items containing, wt.%: SiO₂, 38-52; Na₂O, 16-24; B₂O₃, 13-22; Al₂O₃, 4-7; CaO, 2-7; Ni₂O₃, 1.5-2.0; Co₂O₃, 0.6- 1.0; Fe₂O₃, 1-3; MnO, 1-3; CuO, 0.25-1.0; MoO₃, 0.25-1.0; ZnO, 0.25-1.0; and CdO, 0.25- 1.0. For fabrication of enamel, concentrates of man-made wastes can be used in the following ratio, wt.%: Co₂O₃, 9-43; MnO, 4-35; Fe₂O₃, 9-20; CuO, 2-6; SiO₂, 3-30; CdO, 0.5-7; ZnO, 1-5; Al₂O₃, 1-15; CaO, 1-8; MoO₃, 2-6; and Na₂O., 2-11. EFFECT: improved flowability of enamel upon firing and strengthened adhesion to metal. 2 cl, 1 tbl