KR20110083272A - The car filler tube surface processing method besides - Google Patents

The car filler tube surface processing method besides Download PDF

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Publication number
KR20110083272A
KR20110083272A KR1020100003422A KR20100003422A KR20110083272A KR 20110083272 A KR20110083272 A KR 20110083272A KR 1020100003422 A KR1020100003422 A KR 1020100003422A KR 20100003422 A KR20100003422 A KR 20100003422A KR 20110083272 A KR20110083272 A KR 20110083272A
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KR
South Korea
Prior art keywords
filler tube
surface treatment
treatment step
tube
filler
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KR1020100003422A
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Korean (ko)
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KR101200105B1 (en
Inventor
강석호
정원섭
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강석호
정원섭
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Priority to KR1020100003422A priority Critical patent/KR101200105B1/en
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Publication of KR101200105B1 publication Critical patent/KR101200105B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions
    • C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F3/00—Brightening metals by chemical means
    • C23F3/02—Light metals
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12—Light metals
    • C23G1/125—Light metals aluminium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/16—Pretreatment, e.g. desmutting
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/24—Chemical after-treatment

Abstract

PURPOSE: A filler tube for an automobile and a surfacing method of a filler tube for an automobile are provided to make a chassis lightweight and to improve productivity by manufacturing a filler tube with aluminum, and to extend the service life of a product by forming an oxide layer having high hardness and excellent corrosion resistance on the surface of a filler tube. CONSTITUTION: A surfacing method of a filler tube for an automobile comprises the steps of: rotating at high speed and rubbing with the surface of a filer tube to have specular gloss(S1); removing impurities from the surface of the filler tube, and cleaning with acid to remove an aluminum oxide layer formed naturally on the surface of the filler tube(S2); removing a sulfuric acid solution from the surface of the filler tube(S3); etching with alkali to remove an aluminum oxide layer formed naturally on the surface of the filler tube(S4); removing a sodium hydroxide solution and impurities from the surface of the filler tube(S5); forming an oxide layer on the surface of the filler tube(S6); digesting the filter tube in a nickel fluoride solution(S7); removing the nickel fluoride solution from the surface of the filler tube(S8); and drying the filler tube with hot air(S9).

Description

Car filler tube surface processing method besides

The present invention relates to a filler tube for automobiles and a surface treatment method thereof. More particularly, the raw material of the filler tube is made of light weight aluminum to pursue lightweighting of the vehicle body, and also easy to manufacture. Due to this, the productivity of the product can be improved, and also the filler tube for automobiles and its surface which can extend the service life of the product by forming an oxide film layer having high hardness and excellent corrosion resistance through anodizing process on the surface of the filler tube. It relates to a treatment method.

In general, the vehicle is equipped with a fuel tank to store the fuel required to drive the vehicle, as well as to fuel the engine to drive the engine. In addition, a filler tube is installed at one side of the fuel tank to serve as a transfer path for transporting the fuel while maintaining airtightness so that the liquid fuel flowing from the fuel injector (lubrication gun) is smoothly transferred to the fuel tank.

In other words, the filler tube is an automotive part that connects the fuel injector and the fuel tank. Since automotive fuels are highly volatile and explosive, filler tubes are important security components that must be designed and manufactured so that fuel does not leak during prolonged use, in an automobile accident, or overturning.

Meanwhile, filler tubes produced at home and abroad are generally made of plastic or carbon steel, but these materials cause limitations in lightening automobiles, contain environmentally harmful substances, and also have a high plating material cost to prevent corrosion. The increase has been a factor in raising the cost of automobile production.

In other words, the plastic filler tube has a three-dimensional shape by extrusion blow molding and is produced rigidly and applied to automobiles, but it is expensive to increase the sealing performance against hydrocarbon gas permeation due to the excessive amount of hydrocarbon gas permeating the plastic. In addition, the fluorine coating process (FLUORINATE) that is harmful to the environment and the human body has to be carried out, and as the number of fuel injections increases, the coating part wears and is damaged due to the continuous flow of fuel, which has a problem in that the sealing performance of the permeation of hydrocarbon gas is significantly decreased.

In addition, since the carbon steel filler tube has a relatively large weight, it is against the current trend to reduce the weight of the vehicle body, and contains environmentally harmful substances (chlorine compounds, etc.), thereby causing environmental pollution.

The present invention has been proposed in order to solve the above-mentioned problems, the purpose of which is to make the raw material of the filler tube of light weight aluminum to pursue the weight of the vehicle body, as well as the characteristics of the aluminum easy to manufacture Due to this, the productivity of the product can be improved, and also the filler tube for automobiles and its surface which can extend the service life of the product by forming an oxide film layer having high hardness and excellent corrosion resistance through anodizing process on the surface of the filler tube. To provide a treatment method.

Surface treatment method of a filler tube for automobiles according to an embodiment of the present invention for achieving the above object is to form a filler tube made of aluminum, the surface of the filler tube through an anodizing process, high hardness and excellent corrosion resistance By forming an oxide film layer having, the anodizing step,

A first surface treatment step of rubbing against the surface of the filler tube while rotating at a high speed at 1500 to 1800 rpm using an oil-based abrasive mainly composed of chromium oxide to give mirror polish; and the fillers subjected to the first surface treatment step A second surface treatment step of performing acidic degreasing to remove the foreign substances on the surface of the filler tube by immersing the tube in an aqueous sulfuric acid solution and simultaneously removing the aluminum oxide layer naturally formed on the surface of the filler tube; and the second surface A first washing step of removing the sulfuric acid solution used in the second surface treatment step from the surface of the filler tube by washing the filler tube through the treatment step with general ion exchange to remove pure inorganic ions from the surface of the filler tube; The filler tube after the washing step is immersed in an aqueous solution containing sodium hydroxide to naturally form the filler tube surface. A third surface treatment step of performing an alkali etching to completely remove the produced aluminum oxide layer; and the hydroxide tube used in the third surface treatment step by washing the filler tube passed through the third surface treatment step with pure water. A second washing step of removing an aqueous solution containing sodium from the surface of the filler tube; and forming an oxide film layer having high hardness and corrosion resistance on the surface of the filler tube that has undergone the second washing step, -1 It is immersed in 15% sulfuric acid electrolyte (capacity ratio) maintaining the temperature to 5 ℃, the constant voltage is 10 to 13V, the current density is treated for 25 to 35 minutes at 2.2 to 2.7A / dm 2 to the thickness of the oxide film layer 10 to Anodizing step to be formed to 50㎛; and 5 to the nickel fluoride solution having a concentration of 40 to 60g / ℓ to maintain a temperature of 25 to 35 ℃ the filler tube passed through the anodic oxidation step Sealing step of immersing for 10 minutes; and, the third washing step of removing the nickel fluoride solution used in the sealing step by washing the filler tube after the sealing step with pure water; and, And a drying step of drying the filler tube after the third washing step with hot air at 70 to 80 ° C.

In addition, the second surface treatment step (S2) is characterized in that the filler tube is immersed for 2 to 5 minutes in a 10% aqueous sulfuric acid solution (capacity ratio) to maintain a temperature of 50 to 70 ℃.

In addition, the third surface treatment step S4 includes 5 wt% of sodium hydroxide, 2 wt% of sodium fluoride (NaF), and 97 wt% of water, based on the total weight of the aqueous solution containing sodium hydroxide. The filler tube is immersed for 5 to 10 seconds in an aqueous solution containing sodium hydroxide having a temperature of 40 to 60 ℃.

An automotive filler tube according to another embodiment of the present invention for achieving the above object is formed of a filler tube made of aluminum, and anodized layer having a high hardness and excellent corrosion resistance on the surface of the filler tube through an anodizing process To form, but the oxide film layer is characterized in that having a thickness of 10 to 50㎛.

As described above, according to the filler tube for automobiles and the surface treatment method according to the present invention, the raw material of the filler tube is made of light weight aluminum to pursue the weight reduction of the vehicle, as well as the characteristics of aluminum easy to manufacture the shape Due to this, the productivity of the product can be improved, and also an anodizing process is formed on the surface of the filler tube to form an oxide film layer having high hardness and excellent corrosion resistance, thereby extending the service life of the product.

1 is a block diagram of a surface treatment method of a filler tube for an automobile according to an embodiment of the present invention.
2 is a perspective view of a filler tube for a vehicle according to another embodiment of the present invention
Figure 3 is a state of use of the filler tube for automobile shown in Figure 2

An automobile filler tube and a surface treatment method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show an automobile filler tube and a surface treatment method according to an embodiment of the present invention, Figure 1 is a block diagram of the surface treatment method of a vehicle filler tube according to an embodiment of the present invention, Figure 2 is a perspective view of a vehicle filler tube according to another embodiment of the present invention, Figure 3 is a view showing a state of use of the vehicle filler tube shown in Figure 2, respectively.

As shown in the drawings, the method for surface treatment of a vehicle filler tube according to an embodiment of the present invention is to form a filler tube (3) made of aluminum, anodizing (Anodising) process on the surface of the filler tube (3) By forming an oxide film (10: Al 2 O 3 ) layer having a high hardness and excellent corrosion resistance through,

As shown in FIG. 1, the anodizing process includes a first surface treatment step S1, a second surface treatment step S2, a first washing step S3, a third surface treatment step S4, , The second washing step (S5), the anodic oxidation step (S6), the sealing step (S7), the third washing step (S8), and the drying step (S9).

The first surface treatment step (S1) is a high-speed rotation at 1500 to 1800rpm using an oil-based abrasive mainly composed of chromium oxide (Cr 2 O 3 ) while rubbing against the surface of the filler tube (3) so that the mirror gloss comes out It is a process to do it.

Such buff polishing using an abrasive is carried out using a known polishing machine, and is performed for the purpose of removing the naturally occurring aluminum oxide layer on the surface of the filler tube 3.

Here, the aluminum oxide layer is naturally produced by combining with oxygen in the air due to the characteristics of aluminum, and the oxide film layer 10 to be produced by the anodizing process of the surface treatment method of the filler tube for automobiles according to an embodiment of the present invention and The aluminum oxide layer, which is composed of the same aluminum oxide but is naturally formed, is very thin and its structure is not dense and unstable, so that the aluminum oxide layer is removed through the surface treatment step (S1, S2, S4), and then the anodic oxidation It is an object to form a highly dense and stable oxide film layer 10 having a predetermined thickness through the step (S6).

In the second surface treatment step S2, the filler tube 3 that has undergone the first surface treatment step S1 is immersed in an aqueous solution of sulfuric acid (H 2 SO 4 ) to form a surface of the filler tube 3. Acid degreasing to remove the foreign substances and at the same time to remove the naturally occurring aluminum oxide (Al 2 O 3 ) layer on the surface of the filler tube (3), 10% aqueous solution of sulfuric acid maintaining a temperature of 50 to 70 ℃ It is preferable to immerse the said filler tube for 2 to 5 minutes in (capacity ratio).

Here, since much grease remains on the surface of the filler tube 3 on which the buff polishing of the first surface treatment step S1 has been performed, if the alkali etching of the third surface treatment step S4 is performed as it is, greasy There is a case that the stain by or may not be colored in the part, the acidic degreasing of the second surface treatment step (S2) is carried out for the purpose of removing the oil, foreign matters and the like.

The first washing step (S3) in the second surface treatment step (S2) by washing the filler tube (3) after the second surface treatment step (S2) in general ion-exchanged with pure water from which inorganic ions have been removed It is a process of removing the used sulfuric acid aqueous solution from the surface of the filler tube (3).

The third surface treatment step S4 is performed by immersing the filler tube 3 passed through the first washing step S3 in an aqueous solution containing sodium hydroxide (NaOH) to the surface of the filler tube 3. Alkali etching is performed to completely remove the naturally formed aluminum oxide layer, and 5% by weight of sodium hydroxide and 2% by weight of sodium fluoride (NaF) based on the total weight of the aqueous solution containing sodium hydroxide. Preferably, the filler tube 3 is immersed for 5 to 10 seconds in an aqueous solution containing sodium hydroxide having a temperature of 40 to 60 ° C., including 97% by weight of water.

Here, the sodium hydroxide dissolves aluminum well, removes the holding oil physically adsorbed by the hydrogen gas generated at that time, and simultaneously smoothes the surface to activate the surface of the filler tube 3.

The second washing step (S5) is an aqueous solution containing sodium hydroxide used in the third surface treatment step (S4) by washing the filler tube (3) after the third surface treatment step (S4) with pure water and It is a process of removing foreign matter (smudge) from the surface of the said filler tube 3.

That is, when the alkali etching of the third surface treatment step S4 is performed, foreign substances of various colors are stuck on the surface of the filler tube 3, which is called smut. The smut is preferably removed before the anodic oxidation step S6 is performed.

The anodic oxidation step (S6) is to form an oxide film layer 10 having high hardness and corrosion resistance on the surface of the filler tube (3) after the second washing step (S5), -1 to 5 ℃ temperature It was immersed in 15% sulfuric acid electrolyte (capacity ratio) to maintain a constant voltage of 10 to 13V, and treated with a current density of 2.2 to 2.7A / dm 2 for 25 to 35 minutes to the thickness (t) of the oxide film layer (10) It is a process to be formed to 10 to 50㎛.

That is, the anodic oxidation step S6 has a predetermined thickness t on the surface of the activated filler tube 3 and forms a highly integrated and stable oxide film layer 10, thereby forming the filler tube 3. By increasing the surface hardness of the product has the effect of extending the service life of the product.

The sealing process step (S7) is to immerse the filler tube (3) through the anodic oxidation step (S6) in a nickel fluoride solution having a concentration of 40 to 60 g / ℓ for 5 to 10 minutes to maintain a temperature of 25 to 35 ℃ In the process, when the oxide film layer 10 is formed, a rectangular small hole is generated, and if the hole is fine but the corrosion is likely to proceed if left as it is, it is necessary to prevent the hole formed on the surface of the oxide film layer 10. It aims to do it.

The third washing step (S8) is to wash the filler tube (3) after the sealing step (S7) with pure water to the nickel fluoride solution used in the sealing step (S7) of the filler tube (3) It is the process of removing from the surface.

The drying step (S9) is hot air dried at 70 to 80 ℃ the filler tube (3) after the third washing step (S8), to prevent the formation of stains on the finished product.

Surface treatment method of the filler tube for automobiles according to an embodiment of the present invention, the raw material of the filler tube (3) is made of light weight aluminum to pursue the weight of the vehicle body, as well as the characteristics of aluminum easy to manufacture Due to this, the productivity of the product can be improved, and also by forming an oxide layer 10 having high hardness and excellent corrosion resistance through an anodizing process on the surface of the filler tube 3, the service life of the product can be extended. It works.

As shown in FIG. 2, the filler tube 3 for an automobile according to another embodiment of the present invention includes a filler tube 3 for connecting the fuel tank 1 and the fuel inlet 2 of the vehicle to communicate with each other. ,

The filler tube 3 is formed of aluminum, and an anodizing process forms an oxide layer 10 having high hardness and excellent corrosion resistance on the surface of the filler tube 3, wherein the oxide layer 10 It has a thickness (t) of 10 to 50㎛.

That is, the raw material of the filler tube 3 is made of light weight aluminum to pursue the weight reduction of the vehicle body, as well as the productivity of the product can be improved due to the feature of aluminum easy to manufacture the shape, and also the filler The anodizing process is formed on the surface of the tube 3 to form the oxide film layer 10 having high hardness and excellent corrosion resistance, thereby extending the service life of the product.

Automotive filler tube 100 according to another embodiment of the present invention having the configuration as described above is used as follows.

In general, the filler tube 100 for a vehicle according to another embodiment of the present invention, as shown in Figure 3, one end is coupled to the fuel tank 1 of the vehicle, the other end is coupled to the fuel inlet (2), The fuel tank 1 and the fuel inlet 2 are used in combination to communicate with each other.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, this is by way of example and not limited to the above-described embodiments, various modifications and equivalent embodiments are possible from those skilled in the art. You will understand the point. In addition, modifications by those skilled in the art can be made without departing from the scope of the present invention. Therefore, the scope of the claims in the present invention will not be defined within the scope of the detailed description, but will be defined by the following claims and their technical spirit.

S1. First surface treatment step S2. Second surface treatment step
S3. First washing step S4. Third surface treatment step
S5. Second washing step S6. Anodic oxidation
S7. Sealing step S8. 3rd washing step
S9. Drying stage
1. Fuel tank 2. Fuel inlet
3. Filler tube
10. Anodized layer t. thickness
100. Car filler tube

Claims (4)

In the filler tube (3) for connecting the fuel tank (1) and the fuel inlet (2) of the vehicle to communicate with each other,
The filler tube 3 is formed of aluminum, and an oxide layer (10: Al 2 O 3 ) layer having high hardness and excellent corrosion resistance is formed on the surface of the filler tube 3 through an anodizing process. By doing so, the anodizing step,
The first surface treatment step of rubbing against the surface of the filler tube (3) while rotating at a high speed of 1500 to 1800rpm (rpm) using an oil-based abrasive mainly composed of chromium oxide (Cr 2 O 3 ) (S1);
The filler tube (3) after the first surface treatment step (S1) is immersed in an aqueous solution of sulfuric acid (Sulfuric acid: H 2 SO 4 ) to remove foreign substances on the surface of the filler tube (3) at the same time the filler tube (3) A second surface treatment step (S2) of performing acidic degreasing to remove the naturally occurring aluminum oxide (Al 2 O 3 ) layer on the surface;
The filler tube 3, which has undergone the second surface treatment step (S2), is washed with pure water from which the inorganic ions have been removed by general ion exchange, and the aqueous sulfuric acid solution used in the second surface treatment step (S2) is applied to the filler tube ( The first washing step (S3) to remove from the surface of 3);
The filler tube (3) after the first washing step (S3) is immersed in an aqueous solution containing sodium hydroxide (Sodium Hydroxide: NaOH) to completely complete the naturally formed aluminum oxide layer on the surface of the filler tube (3) A third surface treatment step S4 for performing alkaline etching to remove;
The filler tube (3) having passed through the third surface treatment step (S4) is washed with pure water, and an aqueous solution containing sodium hydroxide used in the third surface treatment step (S4) is removed from the surface of the filler tube (3). Removing the second washing step (S5);
Forming the oxide film layer 10 having a high hardness and corrosion resistance on the surface of the filler tube (3) after the second washing step (S5), 15% sulfuric acid electrolyte solution to maintain a temperature of -1 to 5 ℃ ( Immersed in a capacity ratio), the constant voltage is set to 10 to 13V, and the current density is treated at 2.2 to 2.7 A / dm 2 for 25 to 35 minutes to form the thickness t of the oxide film layer 10 to 10 to 50 μm. Anodizing step (S6);
Sealing step (S7) for immersing the filler tube (3) through the anodic oxidation step (S6) in a nickel fluoride solution having a concentration of 40 to 60 g / ℓ to maintain a temperature of 25 to 35 ℃ (S7);
The third washing step of washing the filler tube (3) after the sealing step (S7) with pure water to remove the nickel fluoride solution used in the sealing step (S7) from the surface of the filler tube (3) S8); And
And a drying step (S9) of hot air drying the filler tube (3) having passed through the third washing step (S8) at 70 to 80 ° C.
The method of claim 1,
The second surface treatment step (S2),
A method for surface treatment of a filler tube for automobiles, wherein the filler tube is immersed for 2 to 5 minutes in a 10% aqueous sulfuric acid solution (capacity ratio) maintaining a temperature of 50 to 70 ° C.
The method of claim 1,
The third surface treatment step (S4),
Sodium hydroxide having a temperature of 40 to 60 ℃ including 5% by weight of sodium hydroxide, 2% by weight of sodium fluoride (NaF), 97% by weight of water with respect to the total weight% of the aqueous solution containing sodium hydroxide Surface treatment method of a filler tube for automobiles, characterized in that the filler tube is immersed in an aqueous solution for 5 to 10 seconds.
In the filler tube (3) for connecting the fuel tank (1) and the fuel inlet (2) of the vehicle to communicate with each other,
The filler tube 3 is formed of aluminum, and an anodizing process forms an oxide layer 10 having high hardness and excellent corrosion resistance on the surface of the filler tube 3, wherein the oxide layer 10 is An automobile filler tube having a thickness of 10 to 50 µm.
KR1020100003422A 2010-01-14 2010-01-14 The car filler tube surface processing method besides KR101200105B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101291062B1 (en) * 2013-04-30 2013-08-01 주식회사 모아기술 Method of surface treatment for exterior decor of car
KR20230087797A (en) 2021-12-10 2023-06-19 강소인 brain activation portable leaming device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100786535B1 (en) * 2007-05-07 2007-12-17 정호순 Filler tube assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101291062B1 (en) * 2013-04-30 2013-08-01 주식회사 모아기술 Method of surface treatment for exterior decor of car
KR20230087797A (en) 2021-12-10 2023-06-19 강소인 brain activation portable leaming device

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