SU1222646A1 - Enamel for steel - Google Patents

Description

The invention relates to compositions of colored coating fluoride enamels for corrosion protection of products from thin-sheet, low-carbon steel used in electrical engineering and other sectors of the national economy.

The purpose of the invention is to increase the heat resistance.

Specific enamel formulations are given in

tab. one.

For the preparation of colored coating enamels, charge materials are used: tripolyphosphate, quartz sand, soda, boric acid, borax, titanium dioxide, magnesium oxide, lithium carbonate, aluminum hydroxide, cobalt oxide, chromium oxide, copper oxide and iron oxide.

Enamel is cooked in oil-fired rotary kilns at 1200-1250 ° C for 1 h 20 min - 1 h 30 min.

2226462

with subsequent production by granulation on water.

Enamel grinding is carried out in a ball mill to a thickness of 10–12 units (according to a Lysenko vessel, Azarov method), specific gravity 1.72–1.75 g / cm3.

The following components are loaded into the mill.

Frit 100 to Clay 5-6

Potassium chloride 0.1-0.2 Ground sand 0.5-2.5 Water35-45

The enamel slip is applied on pre-J5 welded primed parts,

For example, from steel 0.8 kP by known methods, dried and calcined in a seven-ton conveyor electric furnace for 3-5 minutes at a temperature of 20 zones over 679-850 seconds.

The properties of the enamel compositions are given in. tab. 2

Table 1

Temperature var-, ki, C

Firing interval,

Shock resistance, kgm

Heat resistance

The coefficient of thermal expansion of OS - 10 degrees

table 2

1200

1250 1200

1250

720-820 720-820 720-800 700-800

0.12

0.11 0.13

0.12

300

290

310

280

102

103

104

101

Claims (1)

<claim-text> ENAMEL FOR STEEL, including </ claim-text> </ td> <td> <claim-text> cu </ claim-text> </ td> <td> <claim-text> 0.2-1.5 </ claim-text> </ td> </ tr> <tr> <td> <claim-text> 5ΐ0 <sub> 2 </ sub>, P ^ O ^ ·, Τϊ0 <sub> 2 </ sub>, ΖγΟ <sub> 2 </ sub>, B <sub> g </ sub> 0 <sub>? </ Sub>, A1 <sub> 2 </ sub> 0 ^, </ claim-text> </ td> <td> <claim-text> Re <sub> 2 </ sub> 0, </ claim-text> </ td> <td> <claim-text> 0.5-2 </ claim-text> </ td> </ tr> <tr> <td> <claim-text> Ea <sub> 2 </ sub> 0, M <sub> 8 </ sub> 0, CaO, Co <sub> 2 </ sub> 0 <sub>? </ sub>, Cu, D <sub> 2 </ sub> 0 <sub> 5 </ sub>, </ claim-text> </ td> <td> <claim-text> Cr <sub> 2 </ sub> 0, </ claim-text> </ td> <td> <claim-text> 0.1-0.4 </ claim-text> </ td> </ tr> <tr> <td> <claim-text> Cr <sub> 2 </ sub> 0 <sub> e </ sub>, characterized in that </ claim-text> </ td> <td> <claim-text> b1 <sub> 2 </ sub> 0 </ claim-text> </ td> <td> <claim-text> 0.5-2 </ claim-text> </ td> </ tr> <tr> <td> <claim-text> that, in order to improve heat resistance, it additionally contains bx <sub> 2 </ sub> 0 </ claim-text> </ td> <td> <claim-text> and the sum is above 51. </ claim-text> </ td> <td> <claim-text> 5ΐΟ <sub> ζ </ sub>, Ζγ0 <sub> 2 </ sub> and A1 <sub> 2 </ sub> 0 <sub> 3 </ sub> pain </ claim-text> </ td> </ tr> </ table> <claim-text> 1 1 </ claim-text>