ENAMEL SLIP (VERSIONS) Russian patent published in 2012 - IPC C03C8/16 

FIELD: chemistry.

SUBSTANCE: invention relates to protection of metal articles from corrosion. The enamel slip contains the following components in pts.wt: frit 100; clay 3-5; water 25-30; filling agent 0.01-0.15; diatomite 10-30, said frit having the following composition in wt %: SiO₂ - 23-35; Na₂O - 17-19; B₂O₃ - 13-18; K₂O - 7-11; Li₂O - 3-5; TiO₂ - 11-15; BaO - 6-9; Na₃AlF₆ - 4.5-6.0; P₂O₅ - 3-7. In another version of the invention, the enamel slip contains the following components in pts.wt: frit 100; clay 3-5; filling agent 0.01-0.15; diatomite 10-30 and at least one of the components of a group of organic substances: n-butyl alcohol, glycerine, ethylene glycol 15-25, said frit having the following composition in wt %: SiO₂ - 23-35; Na₂O - 17-19; B₂O₃ - 13-18; K₂O - 7-11; Li₂O - 3-5; TiO₂ - 11-15; BaO - 6-9; Na₃AlF₆ - 4.5-6.0; P₂O₅ - 3-7; V₂O₅ - 1-3. Content of SiO₂ is a sum of its crystalline and amorphous modifications with fractional content of the latter equal to 15-50%.

EFFECT: lower firing temperature interval, high adhesion strength, spreadability of the enamel coating and possibility of using enamel slip in a wide range of temperatures, including subzero temperatures.

2 cl, 4 tbl