KR20050107904A - Environmental-friendly volatile corrosion inhibitor and method of producing thereof - Google Patents

Abstract

The present invention relates to a vaporizable antirust gel to prevent the corrosion of iron and non-ferrous metals and a method for manufacturing the same, the vaporizable antirust gel according to the production method of the present invention is an environmentally friendly and metal surface using an antioxidant and vegetable oil used as a food additive It can prevent the corrosion for a long time by combining the direct rust prevention effect to block water and air contact and vaporization rust prevention action, and it shows excellent rust prevention effect even in sea water or sea wind.

Description

Environment-friendly Volatile Corrosion Inhibitor and Method of Producing Description

The present invention relates to a vaporizing anti-corrosive gel to prevent the corrosion of ferrous and non-ferrous metals, and to a method for producing the same, more specifically, by using an antioxidant and vegetable oil used as food additives, it is environmentally friendly and blocks moisture and air contact on the metal surface The present invention relates to a vaporizing antirust gel and a method of manufacturing the same, which can prevent corrosion over a long period of time by incorporating a direct antirust effect and a vaporizing antirust effect, and in particular, show excellent antirust effect even in sea water or sea wind.

With the development of various metal processing and industries using metal materials, problems of corrosion of metal products continue to occur during production, transportation, and storage, especially when working under high salinity such as sea water or sea wind. As it progresses, countermeasures are also becoming a big problem.

Conventional rust prevention technology has solved the corrosion problem by thoroughly coating rust preventive grease of petroleum products on steel or nonferrous metal products or materials. There is a problem of environmental pollution caused by the toxicity of rust preventive oil removed during cleaning. Vapor-proof rust inhibitors (VCIs) have been developed as state-of-the-art rust inhibitors that fundamentally solve these problems.

 Vapor-proof rust preventives (VCIs) are vaporizing compounds that, even when placed close to a product, sublimate like naphthalene to form a monomolecular coating, thereby preventing corrosion of the metal. Therefore, it penetrates even fine and cornered areas which are out of reach and are subjected to rust prevention treatment. In addition, the principle of vaporizing rust preventive is that the vaporizing rust preventive particles sublimate to every corner of the metal surface to form a rust-proof monomolecular film, and the monomolecular film chemically blocks oxygen so that the metal is combined with oxygen to form the second hydroxide. It is to prevent iron from being rusted. Therefore, long-term rust prevention is possible, and exhibits excellent rust prevention ability in a normal humid environment, an oxidizing environment, and a tropical environment.

The existing vaporization rust inhibitor is DICHAN (DICYCLOHEXYL AMMONIUM NITRITE) developed by SHELL Petroleum. DICHAN has the advantage of showing long-term rust prevention effect in small amount, but most companies avoid it because there is a risk of cancer or birth defects due to the combination of Nitrite and dihydric and trivalent amines. Doing.

In addition, the conventional grease used a synthetic oil such as mineral oil, olefin oil or silicone oil as a base oil, and these oils are difficult to decompose, and thus there is a risk of environmental pollution.

The present invention is to solve the above problems, harmless to the human body and eco-friendly, but the anti-corrosive effect of the gel-type anti-corrosive effect using the direct anti-rust effect and the evaporative anti-rust effect using the VCI chemical reaction to block the water, air contact on the metal surface It is to provide an environmentally friendly vaporizable rust preventive gel that can be used for metal products related to seawater, while maintaining its advantages such as rust preventive oil, grease and rust preventive solution.

In addition, another object of the present invention to prevent the corrosion over a long period of time using antioxidants and vegetable oils used as food additives and to add a new material to produce a vaporizing anti-corrosive gel showing excellent anti-rust effect even in sea water or sea wind To provide.

Environmentally friendly vaporizable antirust gel of the present invention for achieving the above object is vegetable oil, coagulant, sodium benzoate, caprylic acid, sorbic acid, benzotriazole, 2,6-bis (1,1-dimethylethyl) -4 Methylphenol (CAS NO: 128-37-0).

Preferably, the eco-friendly vaporizable antirust gel of the present invention is 150 to 200 parts by weight of vegetable oil, 5 to 15 parts by weight of coagulant, and benzoic acid based on 1 part by weight of 2,6-bis (1,1-dimethylethyl) -4-methylphenol. 1.5 to 2.5 parts by weight of sodium, 1.5 to 2 parts by weight of caprylic acid, 1 to 1.5 parts by weight of benzotriazole, and 0.5 to 1.5 parts by weight of sorbic acid.

The vegetable oil is preferably palm oil, palm oil, palm kernel oil, cacao butter, and most preferably the vegetable oil is palm oil.

The coagulant may be an alkaline emulsifier such as alkali triethylamine, triethanol amine, NaOH, and most preferably triethanol amine.

The vaporizable antirust gel may further include an additive, and the additive is preferably beta-cyclodextrin.

In addition, the method for producing an environmentally friendly vaporizable antirust gel of the present invention comprises the steps of: a) mixing a vegetable oil and a coagulant to prepare a gel-based basic mixture; b) mixing sodium benzoate, caprylic acid, benzotriazole, sorbic acid with the base mixture; c) adding 2,6-bis (1,1-dimethylethyl) -4-methylphenol and an additive after cooling the mixture; d) aging the mixture at minus 5 ° C. for 30 minutes.

Preferably, further comprising the step of milling the mixture with a mill between the steps c) and d).

2,6-bis (1,1-dimethylethyl) -4-methylphenol (CAS NO: 128-37-0) is an antioxidant and has a corrosion control effect.

Sodium benzoate is used as a preservative in foods as a corrosion inhibitor and is soluble in water.

Caprylic acid and sorbic acid are food additives published by the Food and Drug Administration.

Triethanolamine, which is used as a coagulant, is a harmless substance in skin contact with humans as it is used as an emulsifier in cosmetics and pharmaceuticals.

Beta-cyclodextrin, used as an additive, is a type of starch used in food, cosmetics, and medicines.

As described above, the vaporizable antirust gel of the present invention is manufactured using antioxidants and vegetable oils used as food additives without containing DICHAN or heavy metals, which are harmful to the human body, which is environmentally friendly and harmless to the human body even when in contact with the human body for a long time.

Example

Example 1

50 ml of triethanolamine was added to 1 L of palm oil in a 60 degreeC thermostat, and it stirred for 30 minutes at the speed of 25 rpm / min, and obtained the basic mixture of a gel state. 10 g of sodium benzoate, 8.6 g of caprylic acid, 6.4 g of benzotriazole, and 5.2 g of sorbic acid are added to the base mixture and stirred for 30 minutes at a speed of 25 rpm / min. The mixture is cooled to room temperature, 5 g of 2,6-bis (1,1-dimethylethyl) -4-methylphenol and 4.8 g of an additive beta-cyclodextrin are added and milled for 60 minutes with a mill. After aging for 30 minutes at -5 ℃ and thawed at room temperature to prepare a 970 g of a vaporizable anti-rust gel of white color.

Example 2

70 ml of triethanolamine was added to 1 L of palm oil in a constant temperature bath at 70 ° C. and stirred for 30 minutes at a speed of 25 rpm / min to obtain a gel-based mixture. 10 g of sodium benzoate, 8 g of caprylic acid, 7 g of benzotriazole, and 6.2 g of sorbic acid are added to the base mixture and stirred for 30 minutes at a speed of 25 rpm / min. The mixture is cooled to room temperature, 5 g of 2,6-bis (1,1-dimethylethyl) -4-methylphenol and 5.5 g of an additive beta-cyclodextrin are added and milled for 60 minutes with a mill. After aging for 30 minutes at -5 ℃ and thawed at room temperature to prepare a 980 g of a vaporizable anti-rust gel of white color.

Example 3

50 ml of triethanolamine is added to 1 L of palm kernel oil in a 50 ° C incubator and stirred for 30 minutes at a speed of 25 rpm / min to obtain a gel-based mixture. 12 g of sodium benzoate, 9 g of caprylic acid, 6 g of benzotriazole, and 4 g of sorbic acid are added to the base mixture and stirred for 30 minutes at a speed of 25 rpm / min. The mixture is cooled to room temperature, 5 g of 2,6-bis (1,1-dimethylethyl) -4-methylphenol and 7 g of an additive beta-cyclodextrin are added and milled for 60 minutes with a mill. After aging for 30 minutes at -5 ℃ and thawed at room temperature to prepare a 976 g of a vaporizable anti-rust gel of white color.

Example 4

50 ml of triethylamine was added to 1 liter of cacao butter in a 60 ° C. thermostat and stirred for 30 minutes at a speed of 25 rpm / min to obtain a gel-based mixture. 10 g of sodium benzoate, 8.6 g of caprylic acid, 6.4 g of benzotriazole, and 5.2 g of sorbic acid are added to the base mixture and stirred for 30 minutes at a speed of 25 rpm / min. The mixture is cooled to room temperature, 5 g of 2,6-bis (1,1-dimethylethyl) -4-methylphenol and 4.8 g of an additive beta-cyclodextrin are added and milled for 60 minutes with a mill. After aging for 30 minutes at -5 ℃ and thawed at room temperature to prepare a 970 g of a vaporizable anti-rust gel of white color.

Example 5 Antirust Effect Experiment of Vaporizable Antirust Gel

Metal specimens of carbon steel, aluminum, copper, galvanized steel, tin and nickel (2.5 cm x 2.5 cm) were prepared and polished finely with an aluminum oxide cloth. The metal specimen was washed with isopropyl alcohol and dried at room temperature. Each of the metal specimens were coated with a vaporizing antirust gel of Example 1 to a thickness of 0.2 mm and then subjected to rust prevention experiments. Anti-corrosion test method was Chinese anti-corrosion test method (GB / T10125-1997). That is, it was tested whether or not the production of the rust by continuously spraying 5% saline solution for 24 hours at a temperature of 35 ℃ (+ /-2 ℃) in a thermostat.

Table 1

Metal type Calling state Vaporizing Antirust Gel Vaporizable Antirust Gel Carbon steel No call Outgoing aluminum No call Outgoing Copper No call Outgoing Galvanized steel sheet No call Outgoing Tin No call Outgoing nickel No call Outgoing Remark No call Outgoing cadmium No call Outgoing

The results in Table 1 show that the vaporizable antirust gel prepared by the present invention has excellent antirust effect even under high salt condition.

In addition, it can be seen that it can be applied to both ferrous and non-ferrous metals.

In addition to the anti-rusting function, the vaporizable anti-corrosive gel of the present invention retains the protection and lubrication of metal products and has a high surface adhesion enough to withstand underwater or sea water.

Accordingly, the vaporizable anti-corrosive gel of the present invention is a package that cannot be rusted with an rustproof film or rustproof paper, a metal product that requires underwater rusting, a product that requires protection and lubrication of metal products as well as rust and V / V, pipe fringes ( It can be applied to products that have high momentum such as pipe fringe, pulley, bearing area, etc., and that need rust prevention action on the surface directly touching water or seawater.

The vaporizing rust preventive gel of the present invention is eco-friendly by using antioxidants and vegetable oils used as food additives without using oils of existing petroleum products, and combines the direct rust preventing effect and the vaporizing rust preventing action to block water and air contact on the metal surface. Therefore, corrosion can be prevented over a long period of time, and in particular, since it shows excellent antirust effect even in sea water or sea wind, it has a very useful effect in the rust prevention industry and steel industry.

Claims (11)

Containing vegetable oils, coagulants, sodium benzoate, caprylic acid, sorbic acid, benzotriazole, 2,6-bis (1,1-dimethylethyl) -4-methylphenol (CAS NO: 128-37-0) Vaporizable antirust gel characterized by the above. Vegetable oil 150-200 weight part, coagulant 5-15 weight part, sodium benzoate 1.5-2.5 weight part, caprylic acid 1.5 with respect to 1 weight part of 2, 6-bis (1, 1- dimethylethyl) -4-methylphenols To 2 parts by weight, 1 to 1.5 parts by weight of benzotriazole, 0.5 to 1.5 parts by weight of sorbic acid and 0.5 to 1.5 parts by weight of beta-cyclodextrin. The vaporizable antirust gel according to any one of claims 1 to 3, wherein the vegetable oil is palm oil. The vaporizable antirust gel according to any one of claims 1 to 3, wherein the coagulant is triethanolamine. The vaporizable antirust gel according to any one of claims 1 to 2, further comprising beta-cyclodextrin as an additive. a) mixing the vegetable oil and the coagulant at a temperature of 50 to 70 ℃ and stirring to prepare a gel-based base mixture; b) mixing sodium benzoate, caprylic acid, benzotriazole, sorbic acid with the base mixture; c) adding 2,6-bis (1,1-dimethylethyl) -4-methylphenol and an additive after cooling the mixture to room temperature; And d) The method of producing a vaporizable antirust gel comprising the step of aging the mixture at minus 5 ℃ 30 minutes (aging). a) mixing 150-200 parts by weight of vegetable oil and 5-15 parts by weight of coagulant at a temperature of 50-70 ° C. and stirring to prepare a gel-based basic mixture; b) mixing 1.5 to 2.5 parts by weight of sodium benzoate, 1.5 to 2 parts by weight of caprylic acid, 1 to 1.5 parts by weight of benzotriazole, and 0.5 to 1.5 parts by weight of sorbic acid to the base mixture; c) adding 1 part by weight of 2,6-bis (1,1-dimethylethyl) -4-methylphenol and 0.5 to 1.5 parts by weight of the additive after cooling the mixture; And d) The method of producing a vaporizable antirust gel comprising the step of aging the mixture at minus 5 ℃ 30 minutes (aging). 8. The method according to claim 6 or 7, further comprising milling the mixture with a mill between steps c) and d). The method according to any one of claims 6 to 7, wherein the vegetable oil is palm oil. The method according to any one of claims 6 to 7, The coagulant is a method for producing a vaporizable rust preventive gel, characterized in that triethanolamine. 8. The method of claim 6, wherein the additive is beta-cyclodextrin. 9.