TW201512460A - Surface treatment method for aluminum and aluminum alloy and aluminum articles thereof - Google Patents

Abstract

The present disclosure provides a surface treatment method for aluminum and aluminum alloy. The method includes: forming the first aluminum oxide film on a substrate by applying the first anodizing treatment to the substrate; making the substrate display one color by applying the first dyeing treatment; removing parts of the first aluminum oxide film on the substrate by diamond engraving technique to form patterns on the substrate; forming the second aluminum oxide film on the substrate by applying the second anodizing treatment to the substrate; making the substrate display the other color by applying the second dyeing treatment. An aluminum article made by the exemplary method is also described.

Description

Aluminum and aluminum alloy surface treatment method and aluminum product

The invention relates to a surface treatment method of aluminum and aluminum alloy and an aluminum product obtained by the method.

In recent years, consumer electronic products such as mobile phones and mp3s with diverse colors and patterns have been favored by consumers. A conventional method for forming a color oxide film on a surface of a substrate such as aluminum or aluminum alloy is to anodize a substrate such as aluminum or aluminum alloy in sulfuric acid to form an anodized film having a microporous structure, and then to contain an organic dye. The substrate is dyed in the solution, and the dye is allowed to enter the pores of the oxide film by adsorption, so that the surface of the substrate such as aluminum or aluminum alloy has a color. The substrate is further subjected to a masking treatment, and the substrate is subjected to anodization and dyeing treatment again to impart a multi-color effect to the substrate. However, this method can only form a simple color combination on the surface of the substrate, which cannot satisfy the demand for the combination of multicolor and pattern diversification.

In view of this, the present invention provides a surface treatment method for aluminum and aluminum alloys which can be combined with a variety of colors and patterns.

In addition, it is also necessary to provide an aluminum article obtained by the above method.

A surface treatment method for aluminum and aluminum alloy, comprising the following steps:

Performing a first anodizing treatment on a substrate to form a first aluminum oxide layer on the surface of the substrate;

Performing a first dyeing treatment on the substrate subjected to the first anodization treatment to cause the substrate to exhibit a color;

Performing a diamond engraving process on the substrate subjected to the first dyeing treatment to remove a portion of the first aluminum oxide layer on the surface of the substrate, thereby exposing a portion of the substrate, such that a surface of the substrate is patterned;

Performing a second anodizing treatment on the diamond engraved substrate to form a second aluminum oxide layer in a region of the substrate not covered with the first aluminum oxide layer;

The second anodized substrate is subjected to a second dyeing treatment to cause the substrate to assume another color.

An aluminum article comprising a substrate, the aluminum article further comprising a first aluminum oxide layer and a second aluminum oxide layer formed on the substrate, the first aluminum oxide layer being divided into a plurality of regions, and the second aluminum oxide layer is also Divided into a plurality of regions, each region of the second aluminum oxide layer is spaced apart from and in contact with each of the first aluminum oxide layers.

The surface treatment method of the above aluminum and aluminum alloy forms a color on the surface of the substrate by the first anodizing treatment and the first dyeing treatment, and then milling a part of the first aluminum oxide layer by diamond engraving to The surface of the material forms a specific pattern. Then, another color is formed on the surface of the substrate not covered with the first aluminum oxide layer by the second anodizing treatment and the second dyeing treatment, thereby obtaining an aluminum product in which a plurality of colors are combined with pattern diversification.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of an aluminum article in accordance with a preferred embodiment of the present invention.

Figure 2 is a cross-sectional view of the aluminum article of Figure 1 taken along line II-II.

Referring to FIG. 1 and FIG. 2, a surface treatment method for aluminum and aluminum alloy according to a preferred embodiment of the present invention includes the following steps:

A substrate 11 to be treated is provided. The material of the substrate 11 may be aluminum or an aluminum alloy.

The substrate 11 was ultrasonically washed with absolute ethanol to remove oil stains on the surface of the substrate 11. The ultrasonic cleaning time can be 25 to 35 minutes.

The substrate 11 subjected to ultrasonic cleaning is subjected to a first anodizing treatment. The first anodizing treatment is: the substrate 11 after ultrasonic cleaning is used as an anode, the stainless steel is a cathode, and a voltage of 10-15 V is applied between the anode and the cathode to a concentration of 160-220 g/L. The sulfuric acid is an electrolyte, and the substrate 11 is reacted in an electrolyte at a temperature of 16 to 18 ° C for 30 to 45 minutes. During the first anodizing process, H ₂ O water molecules are ionized to generate H ⁺ ions and OH ⁻ ions, and H ⁺ ions are reduced near the cathode to form H ₂ . 12, the first aluminum oxide layer is first moved to the vicinity of the anode ions to produce water molecules H ₂ O and O _2, O ₂ and the substrate 11 so as to generate a reaction in the surface of the substrate 11 ^- when OH The aluminum layer 12 has a thickness of 10 to 15 μm. A plurality of micropores 121 are formed on the surface of the first aluminum oxide layer 12.

The substrate 11 subjected to the first anodizing treatment is subjected to a first dyeing treatment. The first dyeing treatment is: immersing the substrate 11 subjected to the first anodizing treatment in a dyeing solution having a temperature of 30 to 50 ° C for 1 to 2 minutes. The dyeing solution contains 3 to 10 g/L of the coloring agent 123, and the coloring agent 123 may be a dark organic dye or a dark inorganic dye. In the dyeing process, the dye 123 is adsorbed to the plurality of micropores 121 by diffusion so that the substrate 11 has a color.

The substrate 11 subjected to the first dyeing treatment is subjected to a first sealing treatment to fix the dyeing agent 123 in the plurality of micropores 121. The first sealing treatment may be performed by boiling water sealing, steam sealing, nickel acetate sealing, potassium dichromate sealing, nickel sulfate sealing, nickel acetate sealing, stearic acid sealing, or cold sealing. .

This embodiment is preferably sealed with boiling water. The boiling water sealing hole is specifically: the dyed substrate 11 is placed in a boiling water tank for 30 to 45 minutes, and the boiling water tank is filled with water having a temperature of 95 to 100 ° C. After the boiling water sealing treatment, a transparent first hydrated alumina layer 14 is formed on the surface of the first aluminum oxide layer 12. The first hydrated alumina layer 14 may have a thickness of 10 to 15 μm.

Referring again to FIG. 1, the substrate 11 subjected to the first sealing treatment is subjected to a diamond engraving process to form a specific pattern on the surface of the substrate 11. The diamond engraving process is: providing a diamond engraving machine (not shown), the diamond engraving machine comprising a cutter and a jig; placing the substrate 11 subjected to the first sealing treatment on the jig; The diamond engraving machine drives the substrate 11 to rotate, and the surface of the substrate 11 is milled by a high-speed rotating cutter to remove a portion of the first aluminum oxide layer 12 and the first hydrated alumina layer 14 on the surface of the substrate 11. Thereby, a portion of the substrate 11 is exposed such that the surface of the exposed portion of the substrate 11 exhibits a specific pattern in which a portion exposing the substrate 11 exhibits high brightness. The diamond engraving process takes 1~3min, the cutter speed is 2000~2500r/min, the lower cutter depth is 20~30μm, and the precision is controlled between -0.02mm~0.02mm. It can be understood that different patterns can be formed on the surface of the substrate 11 by adjusting the angle between the cutter and the substrate.

The substrate 11 subjected to diamond engraving is subjected to a second anodizing treatment. The second anodizing treatment is: the substrate 11 processed by diamond engraving is used as an anode, and the stainless steel is used as a cathode, and a voltage of 8 to 13 V is applied between the anode and the cathode to a concentration of 160 to 220 g/L. The sulfuric acid is an electrolytic solution, and the substrate 11 is reacted in a sulfuric acid solution having a temperature of 16 to 18 ° C for 30 to 45 minutes. During the second anodizing treatment, H ₂ O water molecules are ionized to form H ⁺ ions and OH ⁻ ions, and H+ ions are reduced near the cathode to form H ₂ . When OH ^- ions to move to the vicinity of the anode, generating water molecules and H ₂ O O _2, O ₂ and the substrate 11 not covered with the first region of the reaction the alumina layer 12, so that is not covered with the first The region of the aluminum oxide layer 12 and the first hydrated alumina layer 14 forms a second aluminum oxide layer 16, which has a thickness of 10 to 15 μm. The first aluminum oxide layer 12 and the second aluminum oxide layer 16 are in contact with each other on the surface of the substrate 11. A plurality of micropores 161 are formed on the surface of the second aluminum oxide layer 16.

It can be understood that an ink protective layer is coated on the surface of the first hydrated alumina layer 14 so that the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14 are not broken down during the second anodizing treatment.

It can be understood that the diamond engraving substrate 11 is directly subjected to a second anodizing treatment, because the second anodizing treatment uses a lower voltage than the first anodizing, so that the first oxidation is performed. The aluminum layer 12 and the first hydrated alumina layer 14 are not broken down during the second anodizing treatment.

The substrate 11 subjected to the second anodizing treatment is subjected to a second dyeing treatment. The second dyeing treatment is: immersing the substrate 11 subjected to the second anodizing treatment in a dyeing liquid having a temperature of 30 to 50 ° C for 50 to 70 seconds. The dyeing solution contains 1 to 3 g/L of the dye 163, and the dye 163 may be a light-colored organic dye or a light-colored inorganic dye. In the dyeing process, the dye 163 is adsorbed to the plurality of micropores 161 by diffusion, so that the substrate 11 has another color, thereby obtaining an aluminum article 10 in which a plurality of colors are combined with pattern diversification (see FIG. 1). Since the coloring agent 163 is a light-colored dye, and the surface of the first aluminum oxide layer 12 is covered with the first hydrated aluminum oxide layer 14, the second dyeing treatment has a greater influence on the color of the first dyeing treatment. small.

The substrate 11 subjected to the second dyeing treatment is subjected to a second sealing treatment. The second sealing treatment may be performed by boiling water sealing, steam sealing, nickel acetate sealing, potassium dichromate sealing, nickel sulfate sealing, nickel acetate sealing, stearic acid sealing, or cold sealing.

This embodiment is preferably sealed with boiling water. The boiling water sealing hole is specifically: the substrate 11 subjected to the second dyeing treatment is placed in a boiling water tank for 30 to 45 minutes, and the boiling water tank is filled with water having a temperature of 95 to 100 ° C. After the boiling water sealing treatment, a transparent second hydrated alumina layer 18 is formed on the surface of the second aluminum oxide layer 16. The second hydrated alumina layer 18 may have a thickness of 10 to 15 μm. Since the second aluminum oxide layer 16 and the second hydrated aluminum oxide layer 18 are both transparent layers, the coloring agent 163 is a light color, and the coloring agent 123 is a dark color, and the diamond is engraved. The material 11 exhibits a high brightness such that the area of the aluminum article 10 that has been diamond-engraved exhibits high brightness. The first aluminum oxide layer 12 and the second aluminum oxide layer 16 are alternately contacted, so that the substrate 11 exhibits a light and dark effect.

It can be understood that the surface treatment method of the aluminum and aluminum alloy may further include performing a second diamond engraving process on the second sealing treatment substrate 11 and then performing a third anodization on the substrate. The treatment and the third dyeing treatment are performed to obtain an aluminum product 10 in which light and dark, multi-color, and pattern diversification are combined.

Referring to FIG. 2 again, an aluminum article 10 according to a preferred embodiment of the present invention includes a substrate 11 , a first aluminum oxide layer 12 formed on the surface of the substrate 11 , and a first hydrate formed on the surface of the first aluminum oxide layer 12 . The aluminum oxide layer 14, the second aluminum oxide layer 16 formed on the surface of the substrate 11, and the second hydrated alumina layer 18 formed on the surface of the second aluminum oxide layer 16. The first aluminum oxide layer 12 is divided into a plurality of regions, and the second aluminum oxide layer 16 is also divided into a plurality of regions. Each region of the second aluminum oxide layer 16 is spaced apart from each region of the first aluminum oxide layer 12 and mutually contact. Similarly, the first hydrated alumina layer 14 is divided into a plurality of regions corresponding to the first aluminum oxide layer 12, and the second hydrated alumina layer 18 is divided into a plurality of regions corresponding to the second aluminum oxide layer 16, Each region of the second hydrated alumina layer 18 is spaced apart from and in contact with each region of the first hydrated alumina layer 14.

The first aluminum oxide layer 12 is formed on the surface of the substrate 11 by anodization. The first aluminum oxide layer 12 may have a thickness of 10 to 15 μm. The first aluminum oxide layer 12 is formed with a plurality of micropores 121. The dye 123 is adsorbed in the plurality of micropores 121 such that the substrate 11 has a color.

The first hydrated alumina layer 14 is attached to the first aluminum oxide layer 12 by sealing. The first hydrated alumina layer 14 has a thickness of 10 to 15 μm.

The second aluminum oxide layer 16 is formed on the surface of the substrate 11 not covered with the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14 by anodization. The second aluminum oxide layer 16 may have a thickness of 10 to 15 μm. The second aluminum oxide layer 16 is formed with a plurality of micropores 161. The dyeing agent 163 is adsorbed in the plurality of micropores 161 such that the substrate 11 has another color. The surface of the substrate 11 not covered with the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14 exhibits high brightness, such that the area of the aluminum article 10 covered with the second aluminum oxide layer 16 exhibits high brightness. Thereby, an aluminum product 10 in which light and dark, multi-color, and diversified patterns are combined is obtained.

The second hydrated alumina layer 18 is attached to the second aluminum oxide layer 16 by sealing. The second hydrated alumina layer 18 has a thickness of 10 to 15 μm.

The invention will now be specifically described by way of examples.

Example 1:

The first anodizing treatment: the substrate 11 is used as an anode, the stainless steel is a cathode, and a voltage of 10 V is applied between the anode and the cathode, and the substrate 11 is reacted in an electrolyte solution at a temperature of 18 ° C for 45 minutes to be on the substrate 11 . A first aluminum oxide layer 12 is formed on the surface, wherein the electrolyte contains 220 g/L of sulfuric acid. The first aluminum oxide layer 12 has a thickness of 15 μm. A plurality of micropores 121 are formed on the surface of the first aluminum oxide layer 12.

First dyeing treatment: The substrate 11 subjected to the first anodizing treatment was immersed in a dyeing liquid having a temperature of 50 ° C for 2 minutes. The staining solution contained 10 g/L of the dye 123. In the dyeing process, the dye 123 is adsorbed to the plurality of micropores 121 by diffusion so that the substrate 11 has a color.

First sealing treatment: The substrate 11 subjected to the first dyeing treatment was placed in a boiling water tank for 45 minutes, and the boiling water tank was filled with water having a temperature of 95 °C. After the boiling water sealing treatment, a first hydrated alumina layer 14 is formed on the surface of the first aluminum oxide layer 12. The first hydrated alumina layer 14 may have a thickness of 15 μm.

Diamond engraving treatment: The surface of the substrate 11 is milled by a cutter of a diamond engraving machine to form a specific pattern on the surface of the substrate 11. The rotation speed is 2500r/min, the lower cutter depth of the tool is 30μm, and the precision is controlled to 0.02mm. During the diamond engraving process, the cutter cuts off a portion of the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14 on the surface of the substrate 11 to expose a portion of the substrate 11.

The second anodizing treatment: the substrate 11 processed by diamond engraving is used as an anode, and the stainless steel is used as a cathode. A voltage of 8 V is applied between the anode and the cathode to react the substrate 11 in an electrolyte solution having a temperature of 18 ° C. 45 min, thereby forming a second aluminum oxide layer 16 on the surface of the substrate 11 not covered with the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14. The electrolyte contained 220 g/L of sulfuric acid. The second aluminum oxide layer 16 has a thickness of 15 μm. A plurality of micropores 161 are formed on the surface of the second aluminum oxide layer 16.

Second dyeing treatment: The substrate 11 subjected to the second anodizing treatment was immersed in a dyeing liquid having a temperature of 50 ° C for 70 seconds. The staining solution contained 3 g/L of the dye 163. In the dyeing process, the dye 163 is adsorbed to the plurality of micropores 161 by diffusion so that the substrate 11 has another color.

Second sealing treatment: The substrate 11 subjected to the second dyeing treatment was placed in a boiling water tank for 45 minutes, and the boiling water tank was filled with water having a temperature of 95 °C. After the boiling water sealing treatment, a second hydrated alumina layer 18 is formed on the surface of the second aluminum oxide layer 16. The second hydrated alumina layer 18 may have a thickness of 15 μm.

Example 2:

The first anodizing treatment: the substrate 11 is used as an anode and the stainless steel is a cathode. A voltage of 12 V is applied between the anode and the cathode, and the substrate 11 is reacted in an electrolyte solution having a temperature of 17 ° C for 40 minutes to be used in the substrate 11 . The surface forms a first aluminum oxide layer 12 in which the electrolyte contains 200 g/L of sulfuric acid. The first aluminum oxide layer 12 has a thickness of 12 μm. A plurality of micropores 121 are formed on the surface of the first aluminum oxide layer 12.

First dyeing treatment: The substrate 11 subjected to the first anodizing treatment was immersed in a dyeing solution at a temperature of 40 ° C for 1.5 min. The staining solution contained 5 g/L of the dye 123. In the dyeing process, the dye 123 is adsorbed to the plurality of micropores 121 by diffusion so that the substrate 11 has a color.

First sealing treatment: The substrate 11 subjected to the first dyeing treatment was placed in a boiling water tank for 40 minutes, and the boiling water tank was filled with water having a temperature of 98 °C. After the boiling water sealing treatment, a first hydrated alumina layer 14 is formed on the surface of the first aluminum oxide layer 12. The first hydrated alumina layer 14 may have a thickness of 12 μm.

Diamond engraving treatment: The surface of the substrate 11 is milled by a cutter of a diamond engraving machine to form a specific pattern on the surface of the substrate 11. The rotation speed is 2200r/min, the lower cutter depth of the tool is 24μm, and the precision is controlled to 0mm. During the diamond engraving process, the cutter cuts off a portion of the first hydrated alumina layer 14 and the first alumina layer 12 on the surface of the substrate 11 to expose a portion of the substrate 11.

The second anodizing treatment: the substrate 11 treated with diamond engraving is an anode, and the stainless steel is a cathode. A voltage of 10 V is applied between the anode and the cathode to react the substrate 11 in an electrolyte at a temperature of 17 ° C. 40 min, thereby forming a second aluminum oxide layer 16 on the surface of the substrate 11 not covered with the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14. The electrolyte contained 200 g/L of sulfuric acid. The second aluminum oxide layer 16 has a thickness of 12 μm. A plurality of micropores 161 are formed on the surface of the second aluminum oxide layer 16.

Second dyeing treatment: The substrate 11 subjected to the second anodizing treatment was immersed in a dyeing solution having a temperature of 40 ° C for 60 seconds. The staining solution contained 2 g/L of the dye 163. In the dyeing process, the dye 163 is adsorbed to the plurality of micropores 161 by diffusion so that the substrate 11 has another color.

Second sealing treatment: The substrate 11 subjected to the second dyeing treatment was placed in a boiling water tank for 40 minutes, and the boiling water tank was filled with water having a temperature of 98 °C. After the boiling water sealing treatment, a second hydrated alumina layer 18 is formed on the surface of the second aluminum oxide layer 16. The second hydrated alumina layer 18 may have a thickness of 12 μm.

Example 3:

The first anodizing treatment: the substrate 11 is used as an anode and the stainless steel is a cathode. A voltage of 15 V is applied between the anode and the cathode, and the substrate 11 is reacted in an electrolyte at a temperature of 16 ° C for 30 min to be used in the substrate 11 . The surface forms a first aluminum oxide layer 12 in which the electrolyte contains 160 g/L of sulfuric acid. The first aluminum oxide layer 12 has a thickness of 10 μm. A plurality of micropores 121 are formed on the surface of the first aluminum oxide layer 12.

First dyeing treatment: The substrate 11 subjected to the first anodizing treatment was immersed in a dyeing solution at a temperature of 30 ° C for 1 min. The staining solution contained 3 g/L of the dye 123. In the dyeing process, the dye 123 is adsorbed to the plurality of micropores 121 by diffusion so that the substrate 11 has a color.

First sealing treatment: The substrate 11 subjected to the first dyeing treatment was placed in a boiling water tank for 30 minutes, and the boiling water tank was filled with boiling water at a temperature of 100 °C. After the boiling water sealing treatment, a first hydrated alumina layer 14 is formed on the surface of the first aluminum oxide layer 12. The first hydrated alumina layer 14 may have a thickness of 10 μm.

Diamond engraving treatment: The surface of the substrate 11 is milled by a cutter of a diamond engraving machine to form a specific pattern on the surface of the substrate 11. The rotation speed is 2000r/min, the lower cutter depth of the tool is 20μm, and the precision is controlled to -0.02mm. During the diamond engraving process, the cutter cuts off a portion of the first hydrated alumina layer 14 and the first alumina layer 12 on the surface of the substrate 11 to expose a portion of the substrate 11.

The second anodizing treatment: the substrate 11 treated with diamond engraving is an anode, the stainless steel is a cathode, and a voltage of 13 V is applied between the anode and the cathode to react the substrate 11 in an electrolyte at a temperature of 17 ° C. 30 min, thereby forming a second aluminum oxide layer 16 on the surface of the substrate 11 not covered with the first aluminum oxide layer 12 and the first hydrated aluminum oxide layer 14. The electrolyte contained 160 g/L of sulfuric acid. The second aluminum oxide layer 16 has a thickness of 10 μm. A plurality of micropores 161 are formed on the surface of the second aluminum oxide layer 16.

Second dyeing treatment: The substrate 11 subjected to the second anodizing treatment was immersed in a dyeing solution having a temperature of 30 ° C for 50 seconds. The staining solution contained 1 g/L of the dye 163. In the dyeing process, the dye 163 is adsorbed to the plurality of micropores 161 by diffusion so that the substrate 11 has another color.

The second sealing treatment: the substrate 11 subjected to the second dyeing treatment was placed in a boiling water tank for 30 minutes, and the boiling water tank was filled with boiling water at a temperature of 100 °C. After the boiling water sealing treatment, a second hydrated alumina layer 18 is formed on the surface of the second aluminum oxide layer 16. The second hydrated alumina layer 18 may have a thickness of 10 μm.

10‧‧‧Aluminum products

11‧‧‧Substrate

12‧‧‧First aluminum oxide layer

14‧‧‧First hydrated alumina layer

16‧‧‧Second aluminum oxide layer

18‧‧‧Second hydrated alumina layer

121,161‧‧‧micropores

123, 163‧‧‧ stains

no

10‧‧‧Aluminum products

11‧‧‧Substrate

12‧‧‧First aluminum oxide layer

14‧‧‧First hydrated alumina layer

16‧‧‧Second aluminum oxide layer

18‧‧‧Second hydrated alumina layer

121,161‧‧‧micropores

123, 163‧‧‧ stains

Claims (10)

A surface treatment method for aluminum and aluminum alloy, comprising the following steps:
Performing a first anodizing treatment on a substrate to form a first aluminum oxide layer on the surface of the substrate;
Performing a first dyeing treatment on the substrate subjected to the first anodization treatment to cause the substrate to exhibit a color;
Performing a diamond engraving process on the substrate subjected to the first dyeing treatment to remove a portion of the first aluminum oxide layer on the surface of the substrate, thereby exposing a portion of the substrate, such that a surface of the substrate is patterned;
Performing a second anodizing treatment on the diamond engraved substrate to form a second aluminum oxide layer in a region of the substrate not covered with the first aluminum oxide layer;
The second anodized substrate is subjected to a second dyeing treatment to cause the substrate to assume another color. The surface treatment method for aluminum and aluminum alloy according to claim 1, wherein the first anodizing treatment is: applying the substrate as an anode and stainless steel as a cathode, and applying 10 between the anode and the cathode. The voltage of ~15V is reacted with sulfuric acid having a concentration of 160-220 g/L as an electrolyte in a sulfuric acid solution having a temperature of 16 to 18 ° C for 30 to 45 minutes. The method for surface treatment of aluminum and aluminum alloy according to claim 1, wherein the step of the first dyeing treatment is to dye the substrate with a dyeing solution, and the concentration of the dyeing solution is 3~ 10 g/L of the dyeing agent, the first dyeing treatment is carried out at a temperature of 30 to 50 ° C for 1 to 2 minutes. The method for surface treatment of aluminum and aluminum alloy according to claim 1, wherein the diamond engraving process is: milling the surface of the substrate with a cutter having a rotation speed of 2000 to 2500 r/min, A portion of the first hydrated alumina layer on the surface of the substrate is removed such that the substrate has a specific pattern, wherein the tool has a lower knife depth of 20 to 30 μm. The surface treatment method for aluminum and aluminum alloy according to claim 1, wherein the second anodizing treatment is: using a diamond engraved substrate as an anode, stainless steel as a cathode, and an anode and a cathode. Apply a voltage of 8~13V, react with sulfuric acid with a concentration of 160~220g/L as electrolyte, and react in a sulfuric acid solution with a temperature of 16~18°C for 30~45 minutes. The surface treatment method for aluminum and aluminum alloy according to claim 1, wherein the second dyeing step is to dye the substrate subjected to the second anodizing treatment by using a dyeing solution. The staining solution contains a dye having a concentration of 1 to 3 g/L, and the second dyeing treatment is carried out at a temperature of 30 to 50 ° C for 50 to 70 seconds. An aluminum article comprising a substrate, the improvement comprising: the aluminum article further comprising a first aluminum oxide layer and a second aluminum oxide layer formed on the substrate, the first aluminum oxide layer being divided into a plurality of regions, the second The aluminum oxide layer is also divided into a plurality of regions, each of the second aluminum oxide layers being spaced apart from and in contact with each of the first aluminum oxide layers. The aluminum article of claim 7, wherein the aluminum article further comprises a first hydrated alumina layer attached to the first aluminum oxide layer and a second hydrate attached to the second aluminum oxide layer An aluminum oxide layer, the first hydrated alumina layer is divided into a plurality of regions corresponding to the first aluminum oxide layer, and the second hydrated alumina layer is divided into a plurality of regions corresponding to the second aluminum oxide layer, the second hydrate Each region of the aluminum oxide layer is spaced apart from and in contact with each of the first hydrated alumina layers. The aluminum article according to claim 8, wherein the first aluminum oxide layer is formed with a plurality of micropores, and a dye is adsorbed in the plurality of micropores of the first aluminum oxide layer; the second alumina The layer is formed with a plurality of micropores, and another dye is adsorbed in the plurality of micropores of the second aluminum oxide layer. The aluminum product according to claim 9, wherein the first aluminum oxide layer, the first hydrated aluminum oxide layer, the second aluminum oxide layer and the second hydrated aluminum oxide layer each have a thickness of 10 to 15 μm.