SU1555307A1 - Enamel slip - Google Patents

Abstract

The invention relates to slurry compositions for producing single-layer glass-enamel coatings and can be used in enameling electrical household engineering products, gas apparatus. In order to increase the alkali resistance and mechanical strength of the enamel coating, as well as reduce the likelihood of the formation of the fish scale defect, the slip includes, in parts by weight: Frit 100 (containing, by weight%: SIO ₂ 35-39, P ₂ O ₅ 0, 5-2.5, TIO ₂ 0.5-4, AL ₂ O ₃ 1-3, B ₂ O ₃ 17-22, ZRO ₂ 1-4, CAO 1.5-0.2, NA ₂ O 18- 21, K ₂ O 2-4, LI ₂ O 0.5-2, ZNO 0.5-3, CUO 0.3-0.6, MNO ₂ 0.5-1, CO ₂ O ₃ 0.8- 1.4, FE ₂ O ₃ 1-5), quartz sand 1-3, clay 4-6, potassium chloride 0.01-0.1, fluorspar 0.5-4 and water 35-45. The total content of quartz sand and fluorspar is 2-6.5 wt.h. The coating on the basis of enamel slip is characterized by mechanical strength of 0.14-0.166 mm

chemical resistance after boiling in 1 n solution of NA ₂ CO ₃ for ₄ hours 0.10-0.12 mg / cm ²

The time until the first spalling occurs during cathode etching is 120-150 minutes. 3 tab.

Description

The invention relates to slurry compositions for producing single-layer glass-enamel coatings and can be used in enamelling electrical household engineering products, gas apparatus.

The purpose of the invention is to increase the alkali resistance and mechanical strength, as well as to reduce the likelihood of defect formation;

To prepare the slip, an enamel Frit, quartz sand, ground sand, potassium chloride, clay,

fluorspar and water. The following materials are used in the synthesis of frit: quartz sand, trisodium phosphate, aluminum hydroxide, sodium nitrate, titanium dioxide, boric acid, zirconium ore, chalk, potassium nitrate, lithium carbonate, zinc oxide, manganese dioxide, copper oxide and cobalt oxide.

After pre-mixing, the mixture is loaded into a production melting furnace with a capacity of 250 kg of frit. Melting is done at

31555307

1200-1250S during 110-120 minutes, and

upon reaching readiness, the frit is granulated into water. Enamel slips are prepared by wet milling in a ball mill to a fineness, determined by the sediment of 1-192 cm along the vessel Lisenko. The slip is applied by spraying onto previously degreased and pickled samples from steel 08KP 1.2 mm thick. After drying, the samples are burned in a muffle electric furnace at 780-820 ° C for 3-5 minutes.

The compositions of enamel slurries are given in table. one,

The compositions of enamel frits introduced into the slip are listed in Table 2.

The properties of coatings based on the proposed slips are given in the table.

The use of the proposed slurry compositions allows improving the mechanical, durability of the enamel coating, its chemical resistance. An increase in the time before the appearance of a spall on the coating during cathode etching indicates a decrease in the probability of formation of a defect. Fish scales. Schlicker can be used when applying single-layer enamel coatings on washing machines with improved consumer properties.

Claims (1)

The invention enamel slip, including Frit, containing, wt.% :. 35 five , 0 five 0 HA TiOz A1gO, Zr02 Cao NazO KZ0 Ygo Zno Cuo Mn02 Ca203 Fe203 five SiOj.35-39 0.5-2.5 0.5-4 1-3 17-22 1-4 0.2-1.5 18-21 2-4 0.5-2 0.5-3 0.3-0.6 0.5-1 0; 8-1.4 1-5 ground quartz sand, clay, potassium chloride and water, characterized in that, in order to increase the alkali resistance and mechanical strength of the enamel coating, as well as reduce the likelihood of defect formation, I scale fish, also contains fluorspar in the following component ratio, m : I Specified Frit 100 Ground quartz sand1-3 Clay 4-6 Potassium chloride 0.01-0.1 Water 35-45 Fluorspar 0.5-4, the total content of quartz sand and fluorspar being 2-6.5. Ground quartz sand Frit Clay Potassium chloride Water Fluorspar Table 2