KR101399385B1 - Manufacturing method of detergent for aircraft exterior - Google Patents

Abstract

The method of manufacturing an aircraft exterior detergent of the present invention is characterized in that it comprises 1.0 g to 2.0 g of sodium methasilicate, 2.5 g to 5.0 g of sodium carbonate and 2.5 g to 5.0 g of sodium phosphate A first mixing step (S10) of mixing 2.5g to 5.0g of sodium benzoate and 2.5g to 5.0g of sodium citrate in distilled water to form a first mixture, And a second mixing step (S20) of mixing 2.5 g to 5.0 g of benzotriazole with polyethylene glycol to form a second mixture with respect to 1 liter of the cleanser, and mixing the first mixture with the second mixture A third mixing step (S30) of forming a third mixture by mixing and stirring the first mixture and an ethylene glycol monobutyl ether; The fourth consists of the mixing step (S40), the distilled water and the polyethylene glycol and edible alcohol and ethylene glycol monobutyl ether 16: is adapted to mix a volume ratio of 1.5: 1: 1.5.

Description

Technical Field [0001] The present invention relates to a manufacturing method of detergent for aircraft,

The present invention relates to a method of manufacturing an aircraft exterior cleaner, and in particular, to prevent damage or discoloration of a coating layer coated on an outer surface of an aircraft when cleaning an outer surface of an aircraft, and to prevent corrosion and environmental pollution of parts mounted on the exterior of an aircraft The present invention relates to a method for manufacturing an aircraft exterior cleaner which is harmless to a human body and which can improve the environment of a worker and protect a worker.

Typically, after the flight of the aircraft, the outer surface of the aircraft is cleaned with a cleaning agent.

When cleaning the outer surface of the aircraft, the coating layer on the outer surface of the aircraft should not be damaged or discolored, and after cleaning, there should be no corrosion on the threaded part or any mechanical connection.

In the prior art, halogen solvents such as benzene, toluene, light oil, TC, HF and TEC, hydrocarbon solvents or petrochemical solvents are generally used in the manufacture of aircraft exterior cleaners.

Conventional detergents using halogen solvents, hydrocarbon solvents and petrochemical solvents as described above emit atmospheric pollution and toxic pollutants, and unnecessary wastewater is produced. Therefore, a separate cost for treating such wastewater is increased , The odor generated when the organic solvent is volatilized during the cleaning of the outer surface of the aircraft adversely affects the health of the operator and the working efficiency is lowered.

It is an object of the present invention to prevent damage or discoloration of the coating layer coated on the outer surface of an aircraft when cleaning the outer surface of an aircraft and to prevent corrosion of parts mounted on the outer surface of the aircraft, The present invention provides a method of manufacturing an aircraft exterior cleaner which can prevent environmental pollution and is not harmful to human bodies because toxic substances are not generated, thereby improving the environment of the worker and protecting workers.

In order to accomplish the above object, the present invention provides a method for manufacturing an aircraft exterior cleaner,

A method of manufacturing an aircraft exterior detergent for cleaning an outer surface of an aircraft, the method comprising: providing 1.0 grams to 2.0 grams of sodium methasilicate, 2.5 grams to 5.0 grams of sodium carbonate, g to 5.0 g of sodium phosphate, 2.5 to 5.0 g of sodium benzoate and 2.5 to 5.0 g of sodium citrate are mixed and stirred in distilled water to form a first mixture A first mixing step; A second mixing step of mixing 2.5 g to 5.0 g of benzotriazole with polyethylene glycol to 1 liter of the cleaner to form a second mixture; Mixing the first mixture and the second mixture to form a third mixture; And a fourth mixing step (S40) of mixing an edible alcohol and ethylene glycol monobutyl ether with the third mixture to form a detergent,

The distilled water, the polyethylene glycol, the edible alcohol, and the ethylene glycol monobutyl ether are mixed in a volume ratio of 16: 1: 1.5: 1.5.

The method of manufacturing an aircraft exterior detergent of the present invention prevents damage or discoloration of the coating layer coated on the outer surface of the aircraft during cleaning of the outer surface of the aircraft and prevents corrosion of components mounted on the outer surface of the aircraft, All of them are made of an environmentally friendly composition, so that not only environmental pollution but also toxic substances are not generated, which is harmless to the human body, and it is possible to improve the worker environment and protect the workers.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process flow chart of a method for manufacturing an aircraft exterior cleaner of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing an aircraft exterior cleaner of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process flow chart of a method for manufacturing an aircraft exterior cleaner of the present invention.

As shown in FIG. 1, the method for manufacturing an aircraft exterior cleaner of the present invention comprises 1.0 g to 2.0 g of sodium methasilicate, 2.5 g to 5.0 g of sodium carbonate, and 2.5 g To 5.0 g of sodium phosphate, 2.5 to 5.0 g of sodium benzoate and 2.5 to 5.0 g of sodium citrate are mixed and stirred in distilled water to form a first mixture A second mixing step S20 of mixing 2.5 g to 5.0 g of benzotriazole with polyethylene glycol to 1 liter of the cleaning agent to form a second mixture; A third mixing step (S30) of mixing and mixing the first mixture and the second mixture to form a third mixture; mixing the third mixture with an alcoholic beverage and an ethylene glycol monobutyl ether And consists of a fourth mixing stage (S40) for forming a cleaning agent and, with distilled water and the polyethylene glycol and edible alcohol and ethylene glycol monobutyl ether 16: is adapted to mix a volume ratio of 1.5: 1: 1.5.

The operation of the method for manufacturing an aircraft exterior cleaner according to the present invention is as follows.

Distilled water, polyethylene glycol, edible liquor and ethylene glycol monobutyl ether, which are solvents used to produce the aircraft exterior detergent of the present invention, are mixed at a volume ratio of 16: 1: 1.5: 1.5.

Therefore, in order to prepare 1 liter of the detergent, distilled water is 800 ml, polyethylene glycol is 50 ml, and 75 ml of the edible alcohol and ethylene glycol monobutyl ether are mixed.

As shown in FIG. 1, the first mixing step (S10) comprises adding 1.0 g to 2.0 g of sodium methasilicate, 2.5 g to 5.0 g of sodium carbonate and 2.5 g to 5.0 g of sodium carbonate to 800 ml of distilled water. After mixing 5.0 g of sodium phosphate with 2.5 g to 5.0 g of sodium benzoate and 2.5 g to 5.0 g of sodium citrate, The mixture is stirred for about 20 minutes using a stirrer rotating at room temperature at 25 RPM per minute to form a first mixture.

Sodium methosilicate has a cleaning action and degreasing action on the exterior surface of the aircraft. Sodium carbonate and sodium phosphate have a washing and anti-rusting action. Sodium benzoate has antirust effect against ferrous metals. Sodium citrate is sodium methasilicate It promotes the washing reaction by sodium carbonate and sodium phosphate.

Since sodium methasilicate, sodium carbonate and sodium phosphate have strong alkalinity, when using a detergent containing more than the proper amount, it may cause damage to the acrylic coated on the outer surface of the aircraft. Therefore, the proper amount should be used.

In the second mixing step (S20), 2.5 g to 5.0 g of benzotriazole is mixed with 50 ml of polyethylene glycol, and benzotriazole is completely dissolved in polyethylene glycol to form a second mixture.

Since benzotriazole is not dissolved in distilled water, benzotriazole is dissolved in polyethylene glycol, which is an organic solvent, and polyethylene glycol is defatted when washed in an aircraft exterior, and benzotriazole has anti-corrosive action against non-ferrous metals.

In the third mixing step (S30), the first mixture and the second mixture are mixed and stirred using a stirrer rotating at 25 RPM per minute at room temperature until the two mixture are sufficiently mixed to form a third mixture.

In the fourth mixing step (S40), 75 ml of an alcoholic alcohol and 75 ml of ethylene glycol monobutyl ether are mixed and stirred to prepare a 1000 ml of a detergent.

Both edible liquor and ethylene glycol monobutyl ether are defatting, which affects the denaturation of the paint coated on the aircraft exterior, so distilled water, edible liquor and ethylene glycol monobutyl ether are mixed in a 16: 1.5: 1.5 volume ratio And when the edible alcohol and ethylene glycol monobutyl ether relative to the distilled water are larger than the above volume ratio, discoloration of the paint coated on the aircraft exterior occurs.

As described above, the aircraft exterior cleaner of the present invention can prevent bleeding of bolts or mechanical parts mounted on the outside of the aircraft after cleaning the exterior of the aircraft by using sodium benzoate and benzotriazole, and by using chemicals for cleaning and degreasing It has excellent cleaning and degreasing power when cleaning the exterior of aircraft, does not cause discoloration of paint coated on the exterior of aircraft, and harmless to human body by mixing edible spirit instead of conventional hydrocarbon solvent or halogen solvent.

In order to compare the rustproofing performance of the aircraft exterior cleaner of the present invention manufactured as described above, the solvent of the cleaning agent was washed with 800 ml of distilled water, 50 ml of polyethylene glycol, 75 ml of edible alcohol and 75 ml of ethylene glycol monobutyl ether, 1000 ml were prepared. The composition of each solute of the cleaning agent of the present invention was varied with respect to 1000 ml of the cleaning agent to test whether the surface of the sample was corroded or not.

The composition content of the cleaning solvent solute Anodized
7075-T6
Aluminum alloy Coated 7075-T6
Aluminum alloy
Sodium methasilicate Sodium
Carbonate Sodium
Phosphate Sodium
Site rate Sodium
Benzoate Benzotriazole 5.0 g 10.0 g 10.0 g 10.0 g 10.0 g 5.0 g normal normal 4.0 g 7.5 g 7.5 g 7.5 g 7.5 g 5.0 g normal normal 2.0 g 5.0 g 5.0 g 5.0 g 5.0 g 5.0 g normal normal 1.0 g 2.5 g 2.5 g 2.5 g 2.5 g 2.5 g normal normal 1.0 g 1.0 g 1.0 g 1.0 g 2.5 g 1.0 g failure normal 0.5 g 0.5 g 0.5 g 0.5 g 1.0 g 0.25 g failure failure

The rust-inhibitive comparison test shown in Table 1 was conducted by a Sandwich Corrosion Test method according to ASTM F1110 of the American Society for Testing and Materials (ASTM F1110). The test was conducted by using 7075-T6 anodized aluminum alloy having a width of 1 inch and a length of 3 inches The glass islands (filter paper) impregnated with a washing solution in the center of the coated 7075-T6 aluminum alloy specimen were sealed, and both specimens were sealed with a waterproof tape. After about 48 hours, corrosion of the surface of the specimen was determined. If surface corrosion is less than 5%, it is judged to be rust-proof. Otherwise, it is judged as failure.

As shown in Table 1, when sodium benzoate and benzotriazole, which have a rust-inhibiting action, are contained in the cleaning agent in an amount of 2.5 g or more per 1000 ml of the cleaning agent, the rust inhibition is normal.

The composition content of the cleaning solvent solute The first experiment Second experiment
Sodium methasilicate Sodium
Carbonate Sodium
Phosphate Sodium
Site rate Sodium
Benzoate Benzotriazole 5.0 g 10.0 g 10.0 g 10.0 g 10.0 g 5.0 g failure failure 4.0 g 7.5 g 7.5 g 7.5 g 7.5 g 5.0 g failure failure 2.0 g 5.0 g 5.0 g 5.0 g 5.0 g 5.0 g normal normal 1.0 g 2.5 g 2.5 g 2.5 g 2.5 g 2.5 g normal normal 1.0 g 1.0 g 1.0 g 1.0 g 2.5 g 1.0 g normal normal 0.5 g 0.5 g 0.5 g 0.5 g 1.0 g 0.25 g normal normal

Table 2 shows the Acrylic Crazing Test of the aircraft exterior cleaner of the present invention. The solvent of the cleaning agent is 800 ml of distilled water, 50 ml of polyethylene glycol, 75 ml of edible alcohol and 75 ml of ethylene glycol monobutyl Ether was used to prepare 1000 ml of a detergent, and 1000 ml of the detergent was tested by varying the content of each solute of the detergent of the present invention.

The acrylic penetration test was conducted by the method according to ASTM F484 of the American National Standard. As shown in Table 2, each of the cleaning agents prepared by varying the content of the solute was applied to the elongated acrylic, Damage was tested.

As can be seen from Table 2, acrylic is damaged when the content of sodium methasilicate, sodium carbonate, and sodium phosphate, which are strongly alkaline among the components of the cleaning agent, is larger than a proper amount.

According to the rustproofing comparison test of Table 1 and the acrylic penetration test of Table 2, the composition components of the aircraft exterior cleaner of the present invention were 1.0 g to 2.0 g of sodium methasilicate and 2.5 g to 10 g of sodium carbonate, respectively, 5.0 g, the sodium phosphate is 2.5 g to 5.0 g, the sodium benzoate is 2.5 g to 5.0 g, the sodium citrate is 2.5 g to 5.0 g, and the benzotriazole is 2.5 g to 5.0 g. .

Composition component content content Sodium methasilicate 2.0 g 1.0 g Sodium carbonate 5.0 g 2.5 g Sodium phosphate 5.0 g 2.5 g Sodium citrate 5.0 g 2.5 g Sodium benzoate 5.0 g 2.5 g Benzotriazole 5.0 g 2.5 g Polyethylene glycol  50 ml  50 ml Distilled water 350 ml 550 ml 650 ml 800 ml 350 ml 550 ml 650 ml 800 ml Edible liquor 300 ml 200 ml 150 ml 75 ml 300 ml 200 ml 150 ml 75 ml Ethylene glycol monobutyl ether 300 ml 200 ml 150 ml 75 ml 300 ml 200 ml 150 ml 75 ml Discoloration or not discoloration discoloration discoloration discoloration
none discoloration discoloration discoloration discoloration
none

Table 3 shows the contents of the distilled water, the solvent of the edible alcohol and the solvent of the ethylene glycol monobutyl ether in relation to the content of the composition of the preferable solute selected as the solutes of the aircraft exterior cleaner of the present invention by the rustproofing comparison test of Table 1 and the acrylic penetration test of Table 2 (Paint Softening Test), which tests the color change of the paint coated on the exterior of the aircraft.

The paint softening test was carried out by the method according to ASTM F502 of the USA standard. The paint used was an undercoat of BMS 10-79 by BAC 5885 and an enamel of BMS 10-46 by BAC 5845, , As shown in Table 3, each detergent prepared by dissolving the distilled water, the edible alcohol and the solvent of ethylene glycol monobutyl ether was sprayed, and the denaturation of the paint was observed.

According to the paint softening experiment shown in Table 3, it is preferable that the distilled water, the edible alcohol and the ethylene glycol monobutyl ether are mixed at a ratio of 16: 1.5: 1.5 by volume.

The composition content of the cleaning solvent solute
Cleaning rate (%) Sodium methasilicate Sodium
Carbonate Sodium
Phosphate Sodium
Site rate Sodium
Benzoate Benzotriazole 5.0 g 10.0 g 10.0 g 10.0 g 10.0 g 5.0 g 95 4.0 g 7.5 g 7.5 g 7.5 g 7.5 g 5.0 g 94 2.0 g 5.0 g 5.0 g 5.0 g 5.0 g 5.0 g 94 1.0 g 2.5 g 2.5 g 2.5 g 2.5 g 2.5 g 93 1.0 g 1.0 g 1.0 g 1.0 g 2.5 g 1.0 g 62 0.5 g 0.5 g 0.5 g 0.5 g 1.0 g 0.25 g 48

Table 4 relates to the cleaning power test of the aircraft exterior cleaner of the present invention. The contents of the solvent of the cleaning agent selected according to the paint softening test of Table 3 were changed to 800 ml of distilled water, 50 ml of polyethylene glycol, Of ethylene glycol monobutyl ether was used to test the cleaning performance by changing the compositions of the respective solutes of the cleaning agent of the present invention in the same manner as in the rustproofing comparative experiment of Table 1 and the acrylic penetration experiment of Table 2. [

The cleaning power was measured using a Terg-O meter in an environment of a cleaning hardness of 50 ppm (CaCl 2) at a cleaning temperature of 25 ° C according to the Korean Standard Standard KSM 2715.

As shown in Table 4, 1.0 g of sodium methasilicate, 2.5 g of sodium carbonate, 2.5 g of sodium phosphate, 2.5 g of sodium benzoate, 2.5 g of sodium citrate and 2.5 g of Benzotriazole was mixed to prepare a cleaning agent, the cleaning power was 93%, indicating that the cleaning power was excellent.

Claims (1)

A method of manufacturing an aircraft exterior cleaner for cleaning an outer surface of an aircraft,
Sodium Metasilicate, 2.5 to 5.0 g of Sodium Carbonate, 2.5 to 5.0 g of Sodium Phosphate and 2.5 to 5.0 g of Sodium Phosphate, Of sodium benzoate and 2.5 g to 5.0 g of sodium citrate in distilled water to form a first mixture (S10);
A second mixing step (S20) in which 2.5 g to 5.0 g of benzotriazole is mixed with polyethylene glycol to 1 liter of the cleaner to form a second mixture;
A third mixing step (S30) of mixing the first mixture and the second mixture to form a third mixture; And
And a fourth mixing step (S40) of mixing an edible alcohol and ethylene glycol monobutyl ether into the third mixture to form a detergent,
Wherein the distilled water, the polyethylene glycol, the edible alcohol, and the ethylene glycol monobutyl ether are mixed in a volume ratio of 16: 1: 1.5: 1.5.

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