ENAMEL (VARIANTS) Russian patent published in 2005 - IPC

FIELD: protecting materials.

SUBSTANCE: invention relates to materials used for protection of metals against corrosion. Invention proposes variants of enamel composites comprising oxides of silicon, sodium, boron, aluminum, calcium, cobalt, manganese and iron and fluorine also and comprising additionally oxides of lithium, potassium and magnesium or oxides of lithium, chrome and vanadium in the following ratio of components, wt.-%: SiO₂, 37-47; Na₂O, 17-22; B₂O₃, 14-21; Al₂O₃, 5-8; CaO, 1-3; Co₂O₃, 0.6-0.9; MnO, 1.0-2.5; Fe₂O₃, 1.5-3.0; Li₂O, 0.8-2.0; K₂O, 0.5-3.0; MgO, 0.15-2.0, and F, 0.5-3.0; or SiO₂, 37-51; Na₂O. 16-24; B₂O₃, 17-22; Al₂O₃, 5-10; CaO, 1-5; Co₂O₃, 1.1-1.6; MnO, 1-3; Fe₂O₃, 2-4; Li₂O, 1-2; Cr₂O₃, 1-3; V₂O₃, 1-4, and F, 1-4. As charge materials in alloying enamel method involves cobalt and aluminum-chrome concentrates from technogenic waste of the following composition, wt.-%: Co₂O₃, 45-80; MnO, 0.05-6.0; Fe₂O₃, 2-12; SiO₂, 6-24; Al₂O₃, 3-12; CaO, 2-8; Na₂O, 3-11; Cr₂O₃, 0.05-6.0, and Al₂O₃, 60-75; Cr₂O₃, 10-20; SiO₂, 2-8; K₂O, 2-5; Fe₂O₃, 0.05-3.0, respectively. Invention provides the development of enamels and covers made of them showing high complex of technological, mechanical and exploitation properties, among them acid-resistance and abrasive resistance. Invention can be used in manufacturing silicate enamels for steel carbonaceous (below 0.5% of carbon) articles for domestic and technical designation.

EFFECT: improved and valuable properties of enamels.

2 cl, 5 tbl