WO2015102142A1

WO2015102142A1 - Method for surface treating metal interior/exterior material and surface-treated metal interior/exterior material

Info

Publication number: WO2015102142A1
Application number: PCT/KR2014/000297
Authority: WO
Inventors: 조상무
Original assignee: 조상무
Priority date: 2014-01-03
Filing date: 2014-01-10
Publication date: 2015-07-09
Also published as: KR20150081013A; KR101545127B1

Abstract

The present invention relates to a method for surface treating a metal interior/exterior material and a surface-treated metal interior/exterior material and, more specifically, to a method for surface treating a metal interior/exterior material, comprising: forming, from a valve metal, a barrier layer on a surface of the metal interior/exterior material; forming, from an aluminum-based metal, a surface layer on the barrier layer; and anodizing the surface, and dye coloring and sealing the anodized surface. According to the present invention, anodizing, dye coloring and sealing techniques are applied to surfaces of various metal interior/exterior materials such as zinc, stainless steel, magnesium, and the like, thereby having an effect of enabling the surface color of the metal interior/exterior materials to implement variety, elegance and uniformity.

Description

Surface treatment method of metal interior and exterior materials and surface treated metal interior and exterior materials

The present invention relates to a method for surface treatment of metal interior and exterior materials and to a surface-treated metal interior and exterior material, and more particularly to forming a barrier layer made of a valve metal and a surface layer made of an aluminum-based metal on various metal interior and exterior materials. The present invention relates to a surface treatment technology for metal interior and exterior materials that realizes an elegant and uniform surface color by applying anodization technology.

Anodizing is one of the electrochemical film forming methods, which uses an aqueous solution of sulfuric acid, hydroxyl, chromic acid, etc. as an electrolyte to form an anodized film on a metal surface, such as aluminum, to provide mechanical, electrical, and chemical properties. This means a technique for forming an excellent film. The film formed by the anodic oxidation film treatment method is very hard, has high corrosion resistance, and can be dyed in various colors. Accordingly, the film is used in various industrial fields, and has been in the spotlight in product related industries such as mobile phone cases, which are recently in demand. It is a skill.

However, in the case of aluminum material, only the method of machining an aluminum alloy sheet and then anodizing is actually applied, which is insufficient in the case of pure aluminum, whereas the aluminum alloy having high strength has an additive surface such as silicon. This is because it is impossible to form a uniform anodic oxide film due to deposition unevenly.

On the other hand, the machining method is applicable only to the simple form in consideration of the productivity, the complex form is difficult to apply by the economics according to the manufacturing price, and also a method that consumes a lot of effort and cost in the subsequent assembly process. Accordingly, a method of vacuum depositing aluminum and anodizing the deposited aluminum on aluminum die-casting products, which are easy to mass-produce complex shapes, has been recently developed, but there are problems such as thin film adhesion of vacuum deposition.

In order to solve this problem, in Korean Patent Laid-Open Publication No. 10-2012-0116558 (high speed film forming apparatus and film forming method using the same, published on October 23, 2012), the method of solving the adhesion problem of the vacuum deposition method by combining the vacuum deposition method and the arc method. The method has been proposed, the oxide below the stoichiometry in the Republic of Korea Patent Publication No. 10-2012-0116557 (Method of surface treatment of die-cast alloy and die-casting alloy material having a surface structure produced, published on October 23, 2012), Methods using nitrides or oxynitrides have also been suggested.

In addition, the Republic of Korea Patent Publication No. 10-2013-0115475 (Method of surface treatment of the metal interior and exterior materials and the metal interior and exterior materials having a surface structure manufactured by it, published on October 22, 2013) contact with a jig having a thin film thickness during deposition of aluminum Applicable to the method of reinforcing the thickness by cold spray method on the site has been proposed a method that can be applied to magnesium alloy material, but not aluminum, there was a problem that a separate process rather than a continuous process is required.

In the case of the interior and exterior materials of aluminum material, if the thickness of aluminum deposition of the visible part is sufficient, even if the hidden invisible part is not formed uniformly in the subsequent color sealing process, there is no problem in use. Although there is no great difficulty, in the case of metal interior and exterior materials such as magnesium alloy, stainless steel, and zinc alloy, when aluminum has a thin portion, a problem arises that the portion bursts in the anodic oxidation process.

In addition, if a part where the aluminum layer is formed too thin during the aluminum formation process, or some aluminum layer becomes too thin by electropolishing, chemical polishing or mechanical polishing or hairline forming process, this part also becomes The same problem occurred in the anodic oxidation process.

Accordingly, the surface of the metal interior and exterior materials other than the aluminum material can be stably anodized, and accordingly, there is a need for a technology for implementing various exterior colors on the surfaces of the metal interior and exterior materials.

The present invention was devised to solve the above problems, and an object of the present invention is to form a barrier layer made of a valve metal and a surface layer made of an aluminum-based metal on the surface of various metal interior and exterior materials, followed by anodizing. It is to provide a surface treatment technology of the metal interior and exterior materials that apply the technology to realize a beautiful and uniform surface color.

According to an embodiment of the present invention to achieve the object as described above a) forming a barrier layer (10) with a valve metal (Valve Metal) on the surface of the metal interior and exterior (1); b) forming a surface layer 20 of aluminum (Al) -based metal on the barrier layer (10); c) anodizing the surface on which the surface layer 20 is formed; And d) coloring and sealing the dye on the anodized surface.

The valve metal is titanium (Ta), niobium (Nb), tantalum (Ta), zirconium (Zr), vanadium (V), tungsten (W), hafnium (Hf), aluminum (Al) and yttrium (Y). It may be one single metal or two or more alloys selected from the group consisting of, preferably the valve metal is an alloy of titanium (Ta), aluminum (Al) and vanadium (V) or titanium (Ta), aluminum (Al) And an alloy of niobium (Nb), more preferably the valve metal may be Ti6Al4V or Ti6Al7Nb.

In addition, the surface layer 20 is preferably a single layer formed of one selected from the group consisting of aluminum, an aluminum alloy, and an aluminum oxide, nitride, and oxynitride of less than the stoichiometric composition ratio, or a composite layer in which two or more are laminated.

Between step b) and step c), further comprising the step of sanding (sanding) the surface of the product, or at least one selected from the group consisting of chemical polishing, electropolishing and mechanical polishing It may further comprise a polishing step for performing the above.

Meanwhile, the barrier layer 10 may have a thickness of 0.03 to 5 μm, and the surface layer 20 may have a thickness of 5 to 100 μm, and the barrier layer 10 and the surface layer 20 may have PVD (Physical Vapor Deposition). More preferably, at least one selected from the group consisting of evaporation, sputtering, and cathodic vacuum arc.

Further, before the step a), the method may further include a step of pretreating the surface of the metal interior and exterior materials (1) through ultrasonic cleaning or ion bombardment, and in the step d), the group consisting of organic material coloring, inorganic coloring and electrolytic coloring. It is preferable to color the dye to the anodized surface in at least one manner selected from among, and to seal the colored surface in at least one manner selected from the group consisting of hydration, metallic, organic and low temperature. .

In order to achieve the above object, according to another embodiment of the present invention, a barrier layer 10 made of a valve metal is formed on the surface of the metal interior and exterior material 1, and made of aluminum (Al) -based metal. A surface anodized surface layer 20 provides a surface treated metal interior and exterior material formed on the barrier layer 10.

In this case, the surface of the anodized surface layer 20 is preferably sealed after the dye is colored.

In addition, the valve metal is titanium (Ta), niobium (Nb), tantalum (Ta), zirconium (Zr), vanadium (V), tungsten (W), hafnium (Hf), aluminum (Al) and yttrium (Y) It may be one single metal or two or more alloys selected from the group consisting of: Preferably the valve metal is an alloy of titanium (Ta), aluminum (Al) and vanadium (V) or titanium (Ta), aluminum (Al) ) And an alloy of niobium (Nb), and more preferably the valve metal may be Ti6Al4V or Ti6Al7Nb.

The surface layer 20 is preferably a single layer formed of one selected from the group consisting of aluminum, aluminum alloys, aluminum oxides, nitrides, and oxynitrides having a lower than stoichiometric composition ratio, or two or more laminated layers.

Meanwhile, the barrier layer 10 may have a thickness of 0.03 to 5 μm, and the surface layer 20 may have a thickness of 5 to 100 μm, and the barrier layer 10 and the surface layer 20 may have PVD (Physical Vapor Deposition). It is formed in a) method, more preferably at least one selected from the group consisting of evaporation, sputtering and cathodic vacuum arc (Cathodic Vacuum Arc).

As described above, the surface treatment method of the metal interior and exterior materials and the surface-treated metal interior and exterior materials of the present invention apply anodic oxidation, coloring, and sealing treatment technology to the surfaces of various metal interior and exterior materials commonly used, such as zinc, stainless steel, and magnesium. There is an effect that can realize a variety of beautiful and uniform surface color of the metal interior and exterior materials.

1 is a flowchart illustrating a method for treating a surface of a metal interior and exterior material according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing a laminated structure of the surface-treated metal interior and exterior material according to another embodiment of the present invention.

[Description of the code]

1: Metal interior and exterior materials

10: barrier layer

20: surface layer

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts consistent with the technical spirit of the present invention.

First, the present invention provides a method for surface treatment of metal interior and exterior materials including a barrier layer forming step, a surface layer forming step, an anodizing step, and a dye coloring / sealing step according to a preferred embodiment. A flow chart for this is shown in FIG. 1. Each time series step will be described in detail below.

First, in the barrier layer forming step, the metal interior and exterior materials 1 to be processed are prepared. Metal interior and exterior materials (1) means a metal that can be used as interior and exterior materials of the product, zinc, stainless steel, magnesium, aluminum alloy, die-casting alloy (silicon (Sa), iron (Fe), copper (Cu), manganese (Mn depending on the type) ), Metal (zn), nickel (Na), titanium (Ta), lead (Pb), tin (Sn), or chromium (Cr) components can be added). The invention can be applied.

In particular, the metal interior and exterior materials 1 in the present invention may be a metal that does not contain an aluminum component, and it is possible to stably perform the anodizing process by the process according to the present invention without including aluminum.

In the barrier layer forming step, the barrier layer 10 is formed of a valve metal on the surface of the metal interior and exterior material 1 described above. The valve metal refers to a metal that exhibits a valve effect. The valve effect refers to a phenomenon in which a current flows in a solution-to-metal direction but almost does not flow in a metal-to-solution direction. .

Among the valve metals, titanium and niobium are used to produce various colors through the anodizing process in the decorative industry dealing with jewelry. More specifically, when anodizing these valve metals, interference colors such as blue, yellow, pink, or green appear depending on the applied voltage, and the anodizing depth is adjusted according to the magnitude of the applied voltage so that at most 1 μm or less. You will see various colors.

Meanwhile, in the present invention, the barrier layer 10 may be formed of a single metal such as titanium, niobium, tantalum, vanadium, zirconium, tungsten, hafnium, yttrium, or an alloy of two or more of these metals. In addition, it may be formed of an alloy in which aluminum is added to the single metal or the mutual alloy, and it is more preferable to form the barrier layer 10 from Ti 6 Al 4 V or Ti 6 Al 7 Nb, which is a titanium aluminum alloy currently supplied in various compositions.

As used herein, each number in the terms "Ti6Al4V" or "Ti6Al7Nb" does not mean a stoichiometric ratio of the compound but rather a weight ratio in the alloy. More specifically, "Ti6Al4V" refers to a titanium-aluminum-vanadium alloy containing 6 wt% of aluminum (Al) and 4 wt% of vanadium (V) based on the total weight, and in the case of "Ti6Al7Nb". A titanium-aluminum-niobium alloy containing 6 wt% of aluminum (Al) and 7 wt% of niobium (Nb) by weight.

When the barrier layer 10 is first formed on the surface of the metal interior and exterior material 1 using the valve metal, the surface rupture phenomenon is prevented as described above when the anodic oxidation process and the coloring / sealing process are performed on the metal interior and exterior material 1. can do.

More specifically, when the aluminum-based material on the barrier layer 10 is anodized, the thick portion remains unoxidized while the thin portion is all anodized so that the barrier layer 10 is anodized. Contact with the easing solution. At this time, when the barrier layer 10 is composed of valve metals, such an effect can be obtained because the barrier layer 10 is oxidized only at a maximum of 1 μm or less. If the barrier layer 10 is not present, excessive current flows in the portion, causing the surface to burst.

The method of forming the barrier layer 10 is not appropriate because the process temperature is typically higher than 500 ° C. in the case of CVD (chemical vapor deposition) method, which may cause problems such as deformation of a material, and thus is not appropriate. It is preferable to adopt the Deposition method. More specifically, the barrier layer 10 may be formed on the surface by adopting at least one method selected from the group consisting of evaporation, sputtering, and cathodic vacuum arc. It is most preferable to use the sputtering or the cathode vacuum arc method in view of the adhesion of the formation and the like.

Before forming the barrier layer 10, an ultrasonic cleaning process for removing oil components or foreign substances remaining on the surface of the metal interior and exterior materials 1 to be processed is performed, or argon gas ion collision or metal ions in a vacuum chamber. It is preferable to perform a process of removing surface impurities or oxides by the collision method.

On the other hand, the thickness of the barrier layer 10 may vary depending on the process conditions at the time of anodization and the thickness of the surface layer 20 to be described later, if the thickness of the surface layer 20 is sufficiently thick may be 0.03㎛ or more. However, forming all parts of the metal interior and exterior materials 1 with PVD coating uniformly and thickly takes a lot of time and cost and is not easy to process. Therefore, a problem may occur such that a certain portion is formed thinner than other portions, or is formed thinly in contact with a jig or the like, a rear portion, a hidden portion, or the like.

Since the barrier layer 10 and the surface layer 20 are thinner than those of the thickest portion, the portion is anodized not only to the outermost surface layer 20 but also to the barrier layer 10 in the anodic oxidation step. If there is no barrier layer 10 made of a valve metal under the surface layer 20 made of an aluminum-based metal, a problem occurs because the metal interior and exterior materials 1 directly react with the anodizing solution, but the barrier layer 10 ), The barrier layer 10 is anodized to act as a barrier having a predetermined thickness. That is, when a known color of titanium or niobium is developed, a phenomenon occurs that the surface is colored according to an applied voltage. On the other hand, the lack of oxidative pore depth in this part does not show a uniform coloring effect, but this part does not detract from the value of the product because it is a problem-free part.

In the case of titanium, the anodization depth is about 30 to 300 nm and similar in the case of other metal layers. Therefore, the thickness of the barrier layer 10 may be 0.03 μm or more, preferably 0.1 μm or more, and more preferably 0.3 μm. If it is above, the surface of the metal interior / exterior material 1 can be fully protected.

On the other hand, tantalum is about 1.6 nm per 1V, and 100V anodization oxidizes about 160 nm, and niobium is anodic oxidation up to 300-400 nm, so that the barrier layer 10 may be subjected to anodization depending on the conditions of anodizing the surface layer 20. The minimum thickness should be changed accordingly.

The upper limit of the thickness of the barrier layer 10 is not particularly limited, but 5 μm or less is preferable in consideration of the speed of formation of the barrier layer 10 and economical efficiency depending on the price.

Next, the surface layer 20 forming step (b) is a step of forming the surface layer 20 of aluminum-based metal on the barrier layer 10 formed on the surface of the metal interior and exterior material 1 as described above. As for the formation method, it is most preferable to use the sputtering method or the cathode vacuum arc method similarly to the barrier layer 10 described above. Not appropriate

The surface layer 20 may be formed of various materials including aluminum components such as pure aluminum, aluminum alloy, and the like. Preferably, the surface layer 20 may be formed of an aluminum oxide, nitride, or oxynitride layer having a stoichiometric composition ratio. The aluminum compound layer having less than the stoichiometric composition ratio is excellent in hardness and excellent adhesion and strong bonding strength compared to materials such as pure aluminum or aluminum alloy, so that the barrier layer (10) on the metal interior and exterior materials (1) and later It is because strong adhesive force and adhesive force can be provided between the anodic oxide film layers formed.

Next, the anodic oxidation step of step c) is a process of oxidizing a part of the above-described surface layer 20 to an anodized film layer by anodizing treatment, in a range of 5 to 100 μm depending on the required thickness of the anodized film layer. The surface layer 20 must be formed.

In order to obtain the required thickness of the coating layer according to the product requirements, it is possible to variously form the surface layer 20 having an appropriate thickness range. However, as described above, the thickness range is limited when the surface layer 20 is formed to be less than 5 μm. Since the depth of aging is too thin, there is a problem in that it is not possible to make a variety of colors in the subsequent coloration process, and if the surface layer 20 is formed in excess of 100 ㎛, the process time is excessively long, productivity not only decreases but also high process temperature This is because the workpiece is deformed or thickened, causing problems with assembly with other assemblies.

Anodizing treatment, that is, anodizing treatment, is a process of forming a film such as aluminum oxide (Al ₂ O ₃ ) by polarizing a metal product such as aluminum as an anode in a predetermined electrolyte solution under appropriate conditions. Since this film is very hard and has a high corrosion resistance and a porous layer can be formed and dyed in various colors, it is a process that can enhance the commercial value by giving the surface a beautiful and profound color along with practicality such as corrosion resistance and abrasion resistance. to be.

Here, the anodic oxidation may be any of sulfuric acid, hydroxyl, chromic acid, and the like, or a mixed acid thereof. Since the thickness of the film is adjusted according to the required color, the surface layer 20 is preferably prepared in advance as described above. It can be formed to ˜100 μm.

Meanwhile, the method may further include sanding the surface of the surface or performing a hair line treatment before c) anodizing the surface in order to improve the properties or the hall of the required product. Sanding is an operation for polishing the surface of the undercoat with a prescribed sand paper in order to achieve the desired surface treatment purpose, and is for removing surface defects and improving smoothness and adhesion. Hairline is a work used for the purpose of improving product quality by giving hair-like lines to the surface.

In addition, if the final product is matte, it may be anodized as it is, but in the case of manufacturing a glossy product, as the thickness of the thin film increases, the glossiness of the thin film decreases, so that the surface of the product is not immediately anodized c). It is preferred to further add a polishing step, more specifically, chemical polishing, electropolishing or mechanical polishing, before the step. Chemical polishing refers to a process of chemically smoothing the surface of a metal by a polishing process without using an external current. Typically, the main raw material of chemical polishing is phosphoric acid, which performs a process of forming a phosphate film. Electropolishing refers to a polishing method that overcomes the limitations of the surface gloss formation generated by chemical polishing and requires more high gloss, to produce a smooth surface by electrolysis under predetermined conditions.

Next, in the dye coloring and sealing treatment step (d), when the porous coating layer is formed through anodization, the dye is colored on the anodized surface by dye coloring such as organic coloring, inorganic coloring or electrolytic coloring. And finally, performing a sealing process for blocking the pores of the anodized film by a method such as hydration sealing, metallic sealing, organic sealing, and low temperature sealing. The dye coloring process can enhance the product value by adding aesthetics to the surface of the product, and can improve the weatherability and durability of the coloring and the corrosion resistance of the coating through the sealing process.

Hereinafter, an embodiment of a surface treatment method and a surface-treated metal interior and exterior material of the metal interior and exterior materials of the present invention will be described. However, this is only one of the most preferred embodiment of the present invention and does not represent all of the technical idea of the present invention, it is understood that there may be various equivalents and modifications that can replace them at the time of filing the present invention. shall.

EXAMPLE

After polishing the surface of the metal interior and exterior materials 1, such as magnesium alloy, by buffing, the surface of the material is washed through an organic solvent and an ultrasonic cleaning device. After the material is mounted in a vacuum furnace, argon gas ion collision or metal ion collision is performed.

Formed later by applying argon gas while applying negative DC voltage and pulsed DC voltage to the material from several to several hundreds V to several tens of minutes or cleaning the surface while maintaining a cathodic arc discharge to remove surface impurities and oxide film of the material. Enhance adhesion with the layers

The barrier layer 10 is formed using a Ti 6 Al 4 V alloy so as to have a minimum thin film thickness of 1 μm by sputtering. After that, the surface layer 20 was formed in the form of an aluminum thin film of 30 μm. After that, anodization was carried out by sulfuric acid method, and after sealing, sealing was performed.

The metal interior and exterior materials (1) to be treated by the above-described method were in good condition in the top, bottom, left and right front surface anodization. The stepped portion of the rear part was somewhat dark in color due to the thickness variation of the aluminum film, but there was no problem in use because it was not visible after assembly. Various colors such as black, red, gold, green, blue and pink are beautifully implemented.

As a comparative example with respect to the above-described embodiment, as a result of performing the same operation without forming the barrier layer 10, a phenomenon in which a thin portion of the thin film melts in the anodizing process has been found.

The present invention is not limited to the above-described specific embodiments and descriptions, and various modifications can be made by those skilled in the art without departing from the gist of the present invention claimed in the claims. Such variations are within the protection scope of the present invention.

Claims

a) forming a barrier layer (10) with a valve metal on the surface of the metal interior and exterior material (1);

b) forming a surface layer 20 of aluminum (Al) -based metal on the barrier layer (10);

c) anodizing the surface on which the surface layer 20 is formed; And

d) coloring and sealing the dye on the anodized surface;

Surface treatment method of the metal interior and exterior materials comprising a.
The method of claim 1,

The valve metal is made of titanium (Ta), niobium (Nb), tantalum (Ta), zirconium (Zr), vanadium (V), tungsten (W), hafnium (Hf), aluminum (Al) and yttrium (Y). Method of surface treatment of the metal interior and exterior material, characterized in that the single metal or two or more alloys selected from the group.
The method of claim 2,

The valve metal is an alloy of titanium (Ta), aluminum (Al) and vanadium (V) or an alloy of titanium (Ta), aluminum (Al) and niobium (Nb).
The method of claim 3,

The valve metal is Ti6Al4V or Ti6Al7Nb surface treatment method of the metal interior and exterior material, characterized in that.
The method of claim 1,

The surface layer 20,

A surface treatment method for a metal interior and exterior material, characterized in that it is a single layer formed of one selected from the group consisting of aluminum, aluminum alloys, aluminum oxides, nitrides, and oxynitrides having a stoichiometric composition ratio of less than two, or a composite layer in which two or more are laminated.
The method of claim 1,

Between the steps b) and c), further comprising the step of sanding (sanding) the surface of the product (hair line).
The method of claim 1,

Between the steps b) and c), further comprising a polishing step for performing at least one selected from the group consisting of chemical polishing, electropolishing and mechanical polishing.
The method of claim 1,

The thickness of the barrier layer (10) is 0.03 ~ 5 ㎛ the surface treatment method of the interior and exterior materials of metal.
The method of claim 1,

The thickness of the surface layer 20 is a surface treatment method of the metal interior and exterior material, characterized in that 5 ~ 100 ㎛.
The method of claim 1,

The barrier layer (10) and the surface layer (20) is a surface treatment method of the metal interior and exterior material, characterized in that formed by the PVD (Physical Vapor Deposition) method.
The method of claim 10,

The PVD method is at least one selected from the group consisting of vacuum evaporation, sputtering, and cathodic vacuum arc method, the surface treatment method of the metal interior and exterior material.
The method of claim 1,

Before the step a), further comprising the step of pre-treating the surface of the metal interior and exterior material (1) by ultrasonic cleaning or ion bombardment.
The method of claim 1,

In step d),

Dyeing the dye on the anodized surface in at least one manner selected from the group consisting of organic coloring, inorganic coloring and electrolytic coloring,

A method for surface treatment of metal interior and exterior materials, characterized by sealing the colored surface in at least one manner selected from the group consisting of hydration sealing, metallic sealing, organic sealing and cold sealing.
A barrier layer 10 made of a valve metal is formed on the surface of the metal interior and exterior material 1,

A surface-treated metal interior and exterior material made of an aluminum (Al) -based metal and having a surface anodized on the barrier layer (10).
The method of claim 14,

The surface of the anodized surface layer 20 is a surface-treated metal interior and exterior material, characterized in that the sealing after the dye is colored.
The method of claim 14,

The valve metal is made of titanium (Ta), niobium (Nb), tantalum (Ta), zirconium (Zr), vanadium (V), tungsten (W), hafnium (Hf), aluminum (Al) and yttrium (Y). Surface-treated metal interior and exterior material, characterized in that it is one single metal or two or more alloys selected from the group.
The method of claim 16,

The valve metal is an alloy of titanium (Ta), aluminum (Al) and vanadium (V) or an alloy of titanium (Ta), aluminum (Al) and niobium (Nb).
The method of claim 17,

And the valve metal is Ti6Al4V or Ti6Al7Nb.
The method of claim 14,

The surface layer 20,

A surface-treated metal interior and exterior material, characterized in that it is a single layer formed of one selected from the group consisting of aluminum, aluminum alloys, aluminum oxides, nitrides, and oxynitrides having a less than stoichiometric composition ratio, or a composite layer in which two or more are laminated.
The method of claim 14,

Surface-treated metal interior and exterior material, characterized in that the thickness of the barrier layer (10) is 0.03 ~ 5 ㎛.
The method of claim 14,

Surface-treated metal interior and exterior material, characterized in that the thickness of the surface layer 20 is 5 ~ 100 ㎛.
The method of claim 14,

Surface-treated metal interior and exterior material, characterized in that the barrier layer (10) and the surface layer (20) is formed by a physical vapor deposition (PVD) method.
The method of claim 22,

The PVD method is a surface-treated metal interior and exterior material, characterized in that at least one selected from the group consisting of evaporation (Evaporation), sputtering and cathodic vacuum arc (Cathodic Vacuum Arc).