SU525633A1 - Enamel - Google Patents

Description

54) ENAMEL

The invention relates to a technique for producing anticorrosive colored enamel coatings on steel products for household purposes, gas aparature and tiles.

Coating enamel is known, containing, Bec.%: Si02 7.8-57.6,., 2-15.8;

BgOj 5, O-6.4; Ca.O O, 5-O, 6; MgU O, 2-O, 3; F 7.8-9.1; NaJI 15.6-21.6 1; Colored coatings based on them are obtained by adding to the grinding of frits of ceramic pigments and mineral dyes during roasting of coatings in the temperature range of 820-86 ° C.

Known composition of enamel, including

Si02, Na.O .B205, NG, jAeT6, CaO 2.

A disadvantage of the known glazes is the low coefficient of thermal expansion and the high softening and firing temperature.

The purpose of the invention is to increase the coefficient of thermal expansion and decrease

softening temperature, and also calcining temperature.

This is achieved by the fact that the enamel additionally contains Meg O, In O, and No C C in the following ratio of components, wt.%: SLOa 47.2-48.5; M ,, 2-4, 18,720, 4; V., 0 13.6-14.2; fa5AfFg 9.8-11.1; CaO 0.6-0.9; Mg; D O, 6-1.O; 2pO 1, O-2D; NaM 0.8-1.5.

The enamels are cooked from technical raw materials for 45-6 ° C at 12OO-122 ° C. The melt is granulated into water. The grinding of the frits is done wet with the addition of clay and pigments. The slip is applied to the primed products and, after drying, burned in the temperature range 7OO-82OC.

Table 1 shows the compositions of enamels,

Table 2 shows the properties of enamels and coatings.

By adding kersemic pigments to the grinding, colored coatings can be obtained.

Table 1

Claims (2)

Table 2 Formula of the invention Enamel, including LLO, Afc205, HfliOib.jpy Na, ACT, CaO. characterized by the fact that, in order to increase the coefficient of thermal expansion and lower the temperature of the onset of softening, as well as the firing temperature, it additionally contains MsGo, 2Tgo.MaSe with the following ratio of njyv / 1 i-it./ji ijiwwf. „J- ™ p1. e :: g / for wearing components, wt.%:, 2-48,5; , At-0,, 8; N02018.7-20.4; .e14 .2; Na, jAeT 9.8-11.1; CaO 0.6-O.9; MyO 0.6-1.0; .0-2.1; Nass 0.8-1.5. Information sources. Those considered in the examination: 1.. Author's certificate No. 416322, M., Cl. S OZ s / OO, 1971. 2. Belev G.I. Low side enamels. /-..-.o01 Chisinau, 1968, p. 21.