SU1154226A1 - Priming enamel - Google Patents

Abstract

SOIL ENAMEL containing SiOf, BjOj, AljO, CaO, Na, 0, NiO, MnO, Co oxide, characterized in that, in order to improve adhesion and lower toughness, it contains Co in the following ratio components, wt.%: 42.4-45.15 810-2 15-17, 5.69-6.5 AljO, 11-12.5 CaO 19-21 0.6-0.8 NiO 1-2 MnOi 0.4-0.8

Description

This invention relates to ground enamel compositions for coatings on steel.

The known composition of the soil enamel for steel l, containing wt.%: Si0236-50

ACO, 3-5

NajO11-19

B4,0j13-20

NiO1-3

CaO10-15

Fe., 031.5-6

, 2-0,6

The disadvantages of this enamel are low mechanical strength, elevated calcination temperature and elevated iron oxide content.

Closest to the invention is the composition of the soil enamel, content, wt.%: SiO 40-50, 0.5-4, CaO 0.5-4; t2-16; 0.5-4i BjG, 13-25; CaFj 4-8 NiO 0.5-2.5, CoO 0.1-1.5% Mn02 1-4 2.

However, the limestone composition is toxic because it contains fluorine compounds, and has an insufficient adhesion strength - 4 points, a impact strength of 0.88 J.

The aim of the invention is to increase the adhesion strength and reduce toxicity.

The goal is achieved by the fact that ground enamel containing SiQ, BjO, CaO,, NiO, MnO, CO oxide as Co oxide contains CojO in the following ratio, wt.%:

Si0242,4-45,15

BjO, 15-17

69-6,5

CaO11-12,5

Na2019-21

NiO0,6-0,8

MpO-g1-2

4-0,8

B tab. 1 given the proposed compositions of soil enamel.

Quartzites, datolite, alumina, borax, soda, pyrolusite, cobalt oxide, nitrous oxide, and sodium nitrate are used as charge materials.

Melting of the enamel is carried out in rotary kilns of periodic action. The charge is loaded into the furnace in the amount of 2.0 tons. The readiness of the enamels is determined by breakdown on the thread and pellet. The thread should be smooth, shiny, without knots. A flat cake smooth, glossy, without inclusions in the fracture. The break of the slips is carried out according to the following layout, wt.%:

Frit100

0

Clay5

Sandy ground 15

Bura0,5

Water45

Ready pshiker pass through

5 sieve 64 holes / cm, tonin is determined by the Lysenko method. Grind size of 17-20%.

The spikeer undergoes aging (overhead) for 8-24 h, specific gravity 1.65-1.70 g / cm consistency 7-10 g / cm

The spiker is refueled with a hot, full borax solution. Drying of products is carried out in a chamber dryer at 120 C. The products are fired in chamber electric furnaces at 850900 C.

In tab. 2 presents the properties of the proposed compositions of soil enamel.

40

The use of the proposed composition will improve the working conditions and increase the strength of adhesion to the substrate.

Table 1 Components

Continued tabl, 1

Table 2 iziinz ™ 0,800,600,67 0,800,400,43 1,002,001,43 Content, wt. X, in the composition

Claims (1)

SOIL ENAMEL containing SiO ₂ , V _g O _? , A1 _g 0 ₁ , CaO, Na, O, NiO, MnO ₂ , Co oxide, characterized in that, in order to increase the adhesion strength and reduce toxicity, it contains Co ^ Oj as Co oxide in the following ratio of components, wt. %: Si0 ₂ 42.4-45.15 In ₂ Oe 15-17 A1 ₂ O ₅ 5.69-6.5 CaO 11-12.5 Na ₂ 0 19-21 Nio 0.6-0.8 MPO-2 1-2 A Co ₂ 0 ₅ 0.4-0.8 3 £ b Short circuit with »f