JPS604909B2 - Processing method for the interface between the glass layer and the base material in stainless steel enamel products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Recently, stainless steel enamel products partially coated with a glass layer have been put on the market, taking advantage of the characteristics of both stainless steel and enamel.

These stainless steel enameled products are useful for sinks, washstands, pots, etc., but the interface between the glass layer and the stainless steel base is extremely susceptible to rust. The reason for this is that in order to manufacture such stainless steel enamel products, pongee is applied to a stainless steel base and fired to form a glass layer on the surface of the base, but the glass layer shrinks when cooled after firing, so-called pongee. The phenomenon of bubbly occurs. When sleeve stiffness occurs, the base material that was once covered by the glass layer is exposed, but when this base surface comes into contact with air and moisture, rusting occurs rapidly due to the catalytic action of the remaining glass components. The purpose of the present invention is to effectively prevent rusting at the interface between the glass layer and the base material in stainless steel enamel products.
In addition, the purpose is to provide a product with a clear interface and a desirable appearance, and is characterized in that the interface is processed with metallicon and then polished.

The invention will be explained in detail below. In the present invention, the stainless steel used as the base material may be austenitic, ferritic, or martensitic, and is subjected to acid treatment, alkali treatment, shot blasting, liquid honing, dry honing, etc. before being coated with a glass layer. It is desirable to carry out pre-treatment.

The above substrate is coated with a glass layer, and the glass layer includes, for example, Si0230-55% by weight (hereinafter simply referred to as %), Ti0215-25%, B20310-20%, N
a20 K205~20%, AI2030 Zn0 Mg
○10 Ca01~5%, NaFO~10%, P205
To the frit having a composition of about 0.3 to 2.0% and SQ03 of 0.2 to 1.0%, if desired, add clay such as frog's eye clay, bentonite, terrace sand, magnesium carbonate, magnesium oxide, potassium carbonate, potassium chloride, and lime. A pure drug with appropriate amounts of ordinary mill additives such as sodium nitrate and gum arabic is used.

The pongee application method includes a dry method in which powdered pongee medicine is sprinkled on the heated base material, a method in which the medicine is mixed with water as appropriate to form pongee medicine mud,
A wet method is used in which this is applied to the substrate by spraying, painting, pouring, dipping, etc., followed by drying and firing.
To apply pongee to a part of the substrate, mask the predetermined area with a masking material such as adhesive tape and then apply the pongee, remove the masking area and then fire it, or use a refractory material that does not adhere to the substrate. A method is used in which the refractory is peeled off after a layer is applied, fired, and then the refractory is peeled off. The metals used for metallicon processing at the interface between the glass layer and the substrate include metals and alloys such as aluminum, copper, zinc, chromium, nickel, stainless steel, and duralumin, but it is preferable to use corrosion-resistant and oxidation-resistant metals. Certain metals and alloys are used.

Flame spraying is used for metallization processing. That is, flame spraying using acetylene, oxygen-acetylene, etc. is generally used. After metallization is applied to the interface between the glass layer and the substrate, the surface is polished with a sandpaper, paper sandpaper, toshi, buff, etc.

In this way, since the interface between the glass layer and the substrate is covered with a metal layer by metallicon processing, it does not come into direct contact with air, moisture, etc., and therefore does not rust.

Further, although it is extremely difficult to clearly draw a line at the interface between the glass layer and the substrate, since such an interface is covered with a metal layer, the line can be easily drawn by the metal layer. Examples will be described below to further specifically explain the present invention.

Example 1 2SU
1' of S-30 & steel plate (0.7 x 100 x 150) surface
2 after sandblasting Si0240%, Ti022
0%, &0314%, Na207%, K2011%, A
5 parts of frog's eye clay as a mill additive to a frit having a composition of 1.5% I203, 6% NaF, 0.5% P205;
Add 0.53 parts of bentonite, 0.25 parts of potassium carbonate, and 0.125 parts of sodium nitrite, and mix with 4 parts of water to prepare yuzu mud rice bran. After pongeeing, drying, and firing at 840° C. for 3 minutes, aluminum is immediately deposited on the interface 3 between the glass layer and the substrate by flame spraying, and metallicon processing is performed.

Thereafter, the metal welded surface is polished with a buff. The above test pieces are subjected to rust resistance and peeling resistance tests.

The test consists of observing the surface condition of a test piece after it is immersed in seawater for 10 hours. The test results are as follows.

Example 1 Comparative example with no peeling and rusting* Peeling and rusting *Comparative example is the same as Example 1 without metallicon processing.

Example 2 o In Example 1, stainless steel is welded instead of aluminum.

After that, the metal welded surface was polished by buffing, and as in Example 1, rusting and peeling resistance tests were conducted and no rusting or peeling was found. Example 3 1 on the surface of SUS430 steel plate (0.7 x 100 x 150)
/2 Si0246%, Ti0220%, B50314
%, Na207%, K2011%, A2031.5%
To a frit having a composition of 0.5% P20, 5 parts of Frogme viscosity, 0.5 parts of bentonite, 0.25 parts of potassium carbonate, and 0.125 parts of sodium nitrite were added as mill additives, and 4 parts of water was added.
A pongee clay bran is prepared by kneading it with the anchor part, the pongee is applied by coating the clay, and after drying and firing for 3 minutes at 840°C, copper is immediately applied to the glass layer and the base by flame spraying. Weld to the interface and perform talcon processing.

Thereafter, the metal welded surface is polished with a buff. The above test piece is subjected to the same rusting and peeling resistance tests as in Example 1.

The test results are as follows. Example 3 Comparative example with no peeling or ringing *Example with peeling or rusting Example 4 Instead of copper in Example 3, aluminum is welded.

Claims (1)

[Claims] 1. A method for processing the interface between the glass layer and the substrate in a stainless steel enamel product partially covered with a glass layer, which is characterized by performing metallicon processing on the interface between the glass layer and the substrate, and then polishing it. .