KR100361044B1 - A new anti-rust agent for metal tube and the preparation method thereof - Google Patents

Abstract

The present invention

55-68 parts by weight of silicate (Silicate, 99.9% 300 mesh powder)

Anhydrous sodium carbonate (Soda ash, certified food additive) 7-13 parts by weight

Sodium Pyrophosphate Food Additives 5-12 parts by weight

3 to 5 parts by weight of sodium tripoly

1 to 2 parts by weight of sodium hexametaphosphate

The present invention relates to a cleaning agent for a metal tube manufactured by mixing and maintaining at a temperature equal to or higher than a melting point in a melting furnace for 24 hours, and to forming and cooling the same in a crystal form, and to a method for manufacturing the metal tube.

Description

A new anti-rust agent for metal tube and the preparation method

The present invention relates to a crystalline metal tube cleaning agent based on silicate and phosphate and a method for producing the same.

Korean Patent No. 54129 describes a cleaning agent for metal tubes based on silicates. According to the present invention, a mixture of 80% by weight of silica powder with a purity of 99%, 7% by weight of anhydrous sodium carbonate, 5% by weight of sodium pyrophosphate and 5% by weight of sodium triphosphate is dissolved for 12 hours in a heat of 1650 ° C. It relates to a method for producing a metal tube cleaning agent, characterized in that the molding production.

However, these metal tube cleaners have the drawback of poor efficacy in preventing and preventing the malignant scale and corrosion of water pipes and piping.

The present invention relates to a novel composition for crystallite metal tube cleaning agent based on silicate. MEANS TO SOLVE THE PROBLEM This inventor completed the present invention by performing a long research in order to solve the problem of the said prior art.

The mechanism of silicate-based metal tube cleaning agent is silicate which is dissolved in water by carbonate and forms silicate, and forms silicate which is a strong antirust film on metal surface. The chemical function of the co-silicate to reduce the oxides on the metal surface to its original state, while forming a complex salt with anhydrous sodium carbonate and metal ions such as copper, iron, and magnesium, prevents the activation of metal ions. It is known to prevent the formation and corrosion of malignant scales in water pipes and piping by mixing sodium pyrophosphate and sodium triphosphate, which are dissolved in water and hydrolyzed to form pyrophosphate ions and soluble salts.

However, the Korean Patent No. 054129, which is a known technique, has a defect in that the anti-corrosive and anticorrosive effect of malignant scale and corrosion of water pipes and piping is weak.

In the present invention, silica (Silicate, about 300 mesh powder), anhydrous sodium carbonate (soda ash), sodium pyrophosphate, sodium tripolyphosphate (Na ₅ P ₃ O ₁₀ : manufactured by Sumitomo, Japan) and hexameta phosphate [(NaPO ₃ ( ₆ ) Monsanto Co., Ltd.] was manufactured by melting and adding a metal tube cleaning agent with a novel composition capable of forming a strong anticorrosion coating and anticorrosion coating.

Sodium triphosphate and phosphate solution maintain sodium phosphate component of 100% at low temperature and room temperature, but can not bring about 20% -30% efficacy as ortho phosphate component at high temperature of 1,650 ℃. On the other hand, sodium tripolyphosphate and sodium hexameta phosphate bring about the maintenance of constituents without change of phosphate even at high temperature.

Conventional cleaning agent has a defect that can not form a rust preventive film strongly against the malignant scale of the water pipe, but the cleaning agent of the present invention has a strong role in preventing the formation of the scale itself by forming a strong rust preventive film as well as removing the malignant scale. .

In addition, the novel detergents of the present invention have various functions rather than the conventional detergent of metasodium silicate and patent 054129.

The invention is explained in more detail below.

In the present invention, silica (Silicate, about 300 mesh powder), anhydrous sodium carbonate (soda ash), sodium pyrophosphate, sodium tripolyphosphate (Na ₅ P ₃ O ₁₀ : manufactured by Sumitomo, Japan) and hexameta phosphate [(NaPO ₃ ) ₆ : manufactured by Monsanto, USA.

The present invention has the following composition.

55-68 parts by weight of silica (Silicate, 99.9% purity, 300 mesh powder)

Anhydrous sodium carbonate (Soda ash, certified food additive) 7-13 parts by weight

Sodium Pyrophosphate Food Additives 5-12 parts by weight

3 to 5 parts by weight of sodium tripoly

1 to 2 parts by weight of sodium hexametaphosphate

The mixture is added to a mixer in units of 1,000 kg and uniformly mixed, and then cooled at room temperature for 1-2 hours until the composition is condensed. The mixed mixture was put into a melting furnace, heated to a temperature of 1,650 ° C. for about 24 hours, melted, and then dissolved in a liquid state. The resultant was formed in a molding machine to form a crystal in a crystal form, and then naturally cooled for about 24 to 26 hours. If the product is naturally destroyed and becomes a glass-like transparent crystal, the product is selected and packaged.

When the melting furnace of the composition of the present invention uses an oil burner, the maintenance cost is lower than that of other burners.

The silica of the composition is an alkali component of silicate by anhydrous sodium carbonate, which is insoluble in water or a solvent, is dissolved in water, and alkali silicate is decomposed by acid in the water to produce silicon dioxide (dioxide of silicon). When the aqueous solution comes into contact with the metal surface, a thin and strong film of about 0.5 to 2μ or less is formed on the metal surface by the action of a composite molecule having an electrochemical affinity for a small amount of metal oxide to prevent contact with the anion dissolving the metal, and to prevent rust and It acts as a method.

In addition, the anhydrous sodium carbonate of the composition serves to mask red rust slowly by reducing and dissolving the oxidized material of the metal surface that can dissolve the silicate in water. In addition, by the complex chemical function of silicate and anhydrous sodium carbonate to increase the cleansing action.

Si ions in the silicate bond with anions of organic substances in water to prevent them from adhering to the metal surface, and Na ⁺ ions of anhydrous sodium carbonate serve to suppress the electrical corrosion action between the charged metal ions and the metal surface in water. In addition, sodium pyrophosphate (Na ₂ P ₂ O _2. 10H ₂ O) in the composition is weakly alkaline in water and produces an aqueous solution of sodium bisphosphate.

Sodium pyrophosphate generates complex salts with ions such as Cu ⁺⁺ , Fe ⁺⁺ , and Ma ⁺⁺ and has a strong ability to inhibit the activation of anions.

Therefore, by inhibiting or blocking the activity of the metal ions serves to prevent corrosion. In addition, the sodium trifolio (Na ₅ P ₃ O _10, molecular weight 367.87) in the composition is weakly alkaline and dissolved in water, hydrolyzed to produce pyrophosphate and hydrophilic to block metal ions and disperse the inorganic ions. There is this.

In addition, the aqueous solution of sodium hexametaphosphate in the composition exhibits alkalinity and has a strong corrosion blocking action because it has excellent properties such as metal ion blocking ability, as well as corrosive dispersion and washing.

Therefore, the cleaning agent of the present invention smoothly removes scale and red rust accumulated on the metal surface by synergistic action of each composition, and prevents corrosion and anticorrosive action by dispersing these corrosion factors and activating cations and forming a chemical film. It can maintain and clean the pipes of various metal pipes, circulating cooling paper, heating pipes, industrial plants, etc., and it is a hygienic cleaning agent that is tasteless, odorless, and nontoxic. Not only can it form a film, it can be used safely for a long time, and it can clean the water tank of large buildings such as urban water pipes and apartments at a concentration of 10 μm or less.

In particular, since hydrolysis or eutrophication does not occur in water, it does not eutrophicize the stream even if it flows into the river or cause the death of fish or microorganisms due to lack of oxygen. Helps the creation of.

Therefore, the use of the cleaning agent of the present invention, as well as strong anti-corrosion and anticorrosive effect, even when flowing into the river or the sea does not occur red tide phenomenon, the most safe and hygienic effect that can survive smoothly by the oxygen supply in the water have.

Next, the present invention will be described in more detail by way of examples.

Examples and Comparative Examples:

1) The cleaning agent of the present invention is prepared as follows. However, this embodiment does not limit the scope of the present invention.

Quartz (Silicate, Purity 99.9% 300 Mesh Powder) 680kg

Anhydrous sodium carbonate (Soda ash, food additive certified) 130kg

Sodium Pyrophosphate Food Additive 129kg

Sodium Tripoly 50kg

20 kg of sodium hexametaphosphate

1,000 kg in total

The composition is mixed in a stirrer and stirred sufficiently uniformly and then left for about 2 hours to cool at room temperature. The mixed composition is taken out into a melting furnace and melted at 1,650 ° C. for 12 hours. As the melting process proceeds, the liquid becomes liquid like glass and can be molded in a transparent state like glass. The liquefied glass is placed in a molding machine to solidify in a crystal form and maintain a cooling process at room temperature. If it is left at a low temperature for about 25 hours, it produces a detergent of the crystal-shaped metal tube of the present invention in a transparent solid state. During molding, defective products are sorted and reprocessed and remelted. Clean and clear molded products are packed and shipped in 20kg units.

2) Comparative Example was prepared by the method described in the Example of Patent No. 54129.

3) The cleaning agent of the present invention is odorless, odorless, and nontoxic, and meets the standards of the Drinking Water Standard of the Environment Agency. The physical properties are as follows.

SiO ₂ content: SiO ₂ 64 ~ 68% (± 2%)

Appearance: White or Blue Crystal

Purity: Arsenic (As) 2ppm or less

Lead (Pb) 15 ppm or less

Cadmium (Cd) 2 ppm or less

Mercury (Hg) 0.2 ppm or less

pH: 10.2-11.0

The cleaning agent prepared according to the embodiment of the present invention and the cleaning agent prepared in Comparative Example were respectively injected into tap water at a concentration of 10 ppm to precipitate copper pieces and iron pieces in these samples having different temperatures and pHs, respectively, to determine whether the surfaces of these specimens were corroded. The measured results are as follows.

sample Temperature PH Psalter result Comparative example Room temperature 7.5 Copper piece After 6 months some blue spots are formed. Iron piece After 3 months some red rust precipitates. Production Example Room temperature 7.5 Copper piece After 6 months, the surface of the specimen is clean. Iron piece The specimen remains intact after 6 months. Comparative example 60 ℃ 7.0 Copper piece After 2 months, the specimen surface turned slightly black. Iron piece After 3 months the surface condition of the specimens has become eroded. Production Example 60 ℃ 7.5 Copper piece The specimen remains intact after 6 months. Iron piece The specimen remains intact after 6 months.

Known cleansers are tasteless, odorless, and nontoxic, with no problems with water pollution, but are less effective in terms of anticorrosion and antirust effects. Due to the deterioration of the efficacy, the triphosphate and the phosphate solution maintain 100% sodium phosphate at low and normal temperatures, but 20% to 30% P ₂ O as an ortho phosphate component at a high temperature of 1,000 ° C. _{5 While the} performance is poor, in the present invention, even at a high temperature (1,000 ° C.), _the components of P ₂ O ₅ show a strong anti-rusting performance.

Claims (2)

55 ~ 68 parts by weight of silicate (Silicate, 99.9% 300 mesh powder) Anhydrous sodium carbonate (Soda ash, food additive certified) 7-13 parts by weight Sodium Pyrophosphate Food Additives 5-12 parts by weight 3 to 5 parts by weight of sodium tripoly 1 to 2 parts by weight of sodium hexametaphosphate A metal tube cleaning agent prepared by mixing and dissolving in a melting furnace at a temperature above the melting point (about 1650 ° C.) for 24 hours to dissolve it, and molding and cooling it to a crystal form. 55 ~ 68 parts by weight of silicate (Silicate, 99.9% 300 mesh powder) Anhydrous sodium carbonate (Soda ash, food additive certified) 7-13 parts by weight Sodium Pyrophosphate Food Additives 5-12 parts by weight 3 to 5 parts by weight of sodium tripoly 1 to 2 parts by weight of sodium hexametaphosphate Mixing and maintaining at a melting point temperature (about 1650 ℃) for 24 hours in a melting furnace to dissolve, it is molded and cooled in a crystal form, characterized in that the manufacturing method of the metal tube cleaning agent.