TWI616559B - Metal surface suited anode treatment method and anode treatment device thereof and metal object produced - Google Patents

Abstract

The invention discloses a metal surface patterned anode treatment method, which is applicable to a metal object, and the step of the anode treatment method comprises: providing an electrolytic cell storing the electrolyte, wherein the electrolyte comprises an inorganic acid agent and a biological bacteria, and then placing the metal The article, the target, and the plate having the predetermined shape are placed into the electrolytic cell such that at least a portion of the metal article, the target, and the plate member contact the electrolyte. Electrically connecting the metal object and the plate member to the positive pole of the power supply, and electrically connecting the target to the negative pole of the power supply, and applying an operating voltage from the power supply to polish and form an oxide layer on the surface of the metal object, The surface of the metal object forms a three-dimensional pattern corresponding to the preset shape of the plate. The invention also discloses an anode processing apparatus and a fabricated metal article.

Description

Metal surface patterned anode treatment method and anode treatment device thereof and metal object produced

The invention relates to the technical field of metal surface treatment, in particular to a metal surface patterned anode treatment method and an anode treatment device thereof and a fabricated metal article.

At the beginning of the prevalence of consumer electronic devices, such as mobile phones or notebook computers, such as mobile phones and notebook computers, in order to be light and cheap, the outer casings used are mostly made of plastic as the basic material, at most for the aesthetic requirements. The surface is painted and painted. However, consumer electronic devices have been developed to date, and in addition to functional requirements, today's consumers have become one of the considerations for purchasing consumer electronic devices. At present, most of the consumer electronic products seen are made of metal materials such as aluminum alloy or aluminum-magnesium alloy, and the use of metal materials for the outer casing has the following advantages: diverse appearance, good heat dissipation performance, and good rigidity. The plastic material shell has insufficient material strength and is easy to scratch or break.

Although aluminum alloy or aluminum-magnesium alloy naturally produces an oxide layer on its surface, it can maintain the metal texture and prevent rust and wear. However, under long-term exposure to air, the oxide layer will still be destroyed and lose its protective effect. Therefore, the manufacturer will perform surface treatment on the metal casing, such as electroplating, electroless plating or other coating methods, and form a metal oxide layer on the metal casing to protect it. Taking the anode treatment as an example, the aluminum alloy workpiece is placed in an electrolytic bath to be connected to the anode and direct current is passed through, and a metal oxide layer is formed on the surface of the metal shell by an electrochemical method to prevent further oxidation of the metal shell and also increase The mechanical properties of the surface.

In order to make the electronic product more cool in appearance, after the metal casing is processed by the anode, it will be machined to directly engrave the desired pattern or text on the surface of the metal casing; or, on the metal casing After printing a specific pattern or text, the protective layer is applied and then etched to form a preset graphic. However, the above-mentioned conventional techniques for forming a pattern destroy the metal oxide layer formed on the surface of the metal casing by the anode treatment, so that the subsequently formed pattern does not retain the surface texture and gloss of the metal material itself, and is also easy at the pattern position. Corrosion, and the process of pattern formation of the prior art is relatively cumbersome, resulting in manufacturing limitations such as an inability to increase overall production capacity and high equipment costs.

In addition, the electrolyte used in the prior art (usually dilute sulfuric acid) gradually decreases in functioning with the degree and time of use, resulting in failure to use. Therefore, the electrolyte must be re-substituted, and the replaced electrolyte contains other impurities such as metal ions, which may cause environmental pollution without special treatment. Furthermore, special handling adds a lot of processing costs.

In view of the above, the present invention provides a metal surface patterned anode treatment method and the surface of the anode treatment apparatus and the fabricated metal object to solve the above-mentioned drawbacks and limitations of the prior art.

In view of the above-mentioned prior art shortcomings or limitations of patterning metal objects after anodizing, the inventors of the present invention have finally considered the present invention and finally developed the present invention.

To achieve the above and other objects, the present invention provides a metal surface patterned anode treatment method suitable for use in a metal object, comprising the steps of: First, an electrolytic cell is provided, and an electrolyte is injected into the electrolytic cell, wherein the electrolyte contains inorganic acid and biological bacteria. The metal object and the target are then placed in the electrolytic cell such that at least a portion of the metal object contacts the electrolyte and the liquid temperature of the electrolyte is adjusted. Electrically connecting the metal object to the positive pole of the power supply, electrically connecting the target to the negative pole of the power supply, and placing a plate having a preset shape in the electrolytic bath and contacting the electrolyte, and the template Electrically connected to the positive terminal of the power supply. An operating voltage is applied from the power supply to polish and form an oxide layer on the surface of the metal object, and the surface of the metal object forms a three-dimensional pattern corresponding to the predetermined shape of the plate.

Further, the metal surface patterned anode treatment method of the present invention, wherein the liquid temperature of the electrolyte is controlled between minus 20 degrees Celsius (° C.) and 5 degrees Celsius (° C.).

Further, the metal surface patterned anode processing method of the present invention, wherein the power supply applies an operating voltage value ranging from 5 volts to 32 volts.

Further, the metal surface patterned anode treatment method of the present invention, wherein the distance between the pattern member and the metal object member is not more than 5 cm.

Further, the metal surface patterned anode treatment method of the present invention further comprises the steps of: immersing the metal object formed with the oxide layer in a low temperature electrolyte to perform surface low speed oxide film treatment.

The present invention also provides a metal object having a pattern on the surface, which is produced by the above-described anodizing method, wherein the surface of the metal object has a three-dimensional pattern corresponding to a predetermined shape of the pattern member.

In addition, in order to achieve the above and other objects, the present invention also provides a metal surface patterned anode processing apparatus suitable for use in a metal object, the anode processing apparatus comprising: An electrolytic cell stores an electrolyte, wherein the electrolyte comprises an inorganic acid agent and a biological bacteria, the metal object is placed in the electrolytic cell, and at least a portion of the metal object contacts the electrolyte. A temperature control device is disposed on one side of the electrolytic cell, and the temperature control device is used to adjust the liquid temperature of the electrolyte. A target is placed in the electrolytic cell and at least a portion of the target contacts the electrolyte. A plate having a predetermined shape, the plate being placed in the electrolytic cell and contacting the electrolyte. a power supply having a positive electrode and a negative electrode, the positive electrode being electrically connected to the metal object and the plate member, the negative electrode being electrically connected to the target material, and when the power supply device applies an operating voltage, the metal object is electrochemically electrolyzed in the electrolyte The reaction forms an oxide layer on the surface of the metal object, and the surface of the metal object is formed with a three-dimensional pattern corresponding to the preset shape of the plate member.

Further, the metal surface patterned anode treatment apparatus of the present invention, wherein the volume ratio of the inorganic acid agent to the biological bacteria ranges from 20:1 to 60:1.

Further, the metal surface patterned anode treating apparatus of the present invention, wherein the liquid temperature ranges from minus 20 degrees Celsius (° C.) to 5 degrees Celsius (° C.).

Further, the metal surface patterned anode processing apparatus of the present invention wherein the operating voltage value ranges between 5 volts and 32 volts.

Further, the metal surface patterned anode processing apparatus of the present invention, wherein the distance between the pattern member and the metal object member is not more than 5 cm.

Further, in the metal surface patterned anode processing apparatus of the present invention, the metal object is made of stainless steel, aluminum alloy or aluminum-magnesium alloy, and the target material is titanium alloy.

Further, in the metal surface patterned anode processing apparatus of the present invention, the material of the metal object is a titanium alloy, and the material of the target material is graphite.

Further, the metal surface patterned anode processing apparatus of the present invention, wherein The plate is made of titanium alloy.

Further, the metal surface patterned anode treatment apparatus of the present invention, wherein the inorganic acid agent is selected from the group consisting of monophosphoric acid (H ₃ PO ₄ ), monohydrochloric acid (HCl), monosulfuric acid (H ₂ SO ₄ ), and mono nitric acid (HNO) ₃ ) One of a group of monoboric acid (H ₃ BO ₃ ), monohydrofluoric acid (HF), monohydrobromic acid (HBr), and perchloric acid (HClO ₄ ).

Further, the metal surface patterned anode treating apparatus of the present invention further comprises a glycerin (C ₃ H ₈ O ₃ ) added to the inorganic acid agent, and the glycerin forms a complex lipid with the inorganic acid agent.

Further, the metal surface patterned anode treating apparatus of the present invention, wherein the volume ratio of the inorganic acid agent to the glycerin is in the range of 4:1 to 3:1.

Further, the metal surface patterned anode treatment apparatus of the present invention, wherein the biological bacteria are a yeast, a generation of bacteria, a photosynthetic bacteria, a lactobacillus, a bacillus and a composition thereof, or a fermented dairy product.

Further, the metal surface patterned anode treating apparatus of the present invention further comprises a chitin ((C ₈ H ₁₃ O ₅ N) _n ) added to the inorganic acid agent.

Compared with the prior art, the metal surface patterned anode treatment method and the anode treatment device thereof of the present invention are disposed through a plate of a specific shape, and can be directly formed on the surface of the metal object and closely resembled the shape of the plate member. The three-dimensional patterned oxide layer, the invention does not destroy the oxide layer formed by the anode treatment, so that the surface texture and gloss of the metal object itself can be preserved at the same time, and the material protection effect can be also prevented, thereby avoiding the problem that the surface of the metal object is easily rusted. .

In addition, the anode treatment method and the anode treatment device thereof of the invention can chemically polish and surface the metal object, achieve flattening, glossing and passivation in one process, and simultaneously reach the metal object at the same time. The surface forms the desired specific pattern or text Words, which greatly increase production efficiency and reduce manufacturing costs.

The electrolyte of the invention is environmentally friendly and non-toxic, avoids pollution to the environment, and the electrolyte can pass through the biological bacteria to determine its characteristics, and the electrolysis can be reset by increasing the number of bacteria or using different species and adjusting the number of strains. The electrical properties of the liquid are used for re-use purposes. That is to say, the inactive electrolyte does not need to be replaced, and it is only necessary to increase the concentration of the biological bacteria to restore the function of the electrolyte.

200‧‧‧Anode treatment equipment

210‧‧‧electrolyzer

220‧‧‧ electrolyte

222‧‧‧Inorganic acid agent

224‧‧‧Biological bacteria

230‧‧‧temperature control device

240‧‧‧Metal objects

241‧‧‧Oxide layer

250‧‧‧ targets

260‧‧‧ graphic

270‧‧‧Power supply

S110, S120, S130, S140, S150, S160‧‧ steps

1 is a flow chart showing the steps of a metal surface patterned anode treatment method according to a first embodiment of the present invention.

Fig. 2 is a schematic view showing the configuration of a metal surface patterned anode treating apparatus according to a second embodiment of the present invention.

Fig. 3 is a schematic plan view showing a metal object after performing an anode treatment method according to an embodiment of the present invention.

4A and 4B are experimental finished views illustrating the metal article and the plate member of the present invention.

Fig. 5 is a flow chart showing the steps of a metal surface patterned anode treatment method according to a second embodiment of the present invention.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the accompanying drawings.

Referring to the metal surface patterned anode treatment method and the anode treatment apparatus 200 thereof according to the first embodiment of the present invention shown in FIGS. 1 and 2, respectively, the anode treatment method of the present invention and The anodizing apparatus 200 is applicable to a metal object 240, and the steps of the anodizing method are as follows: First, an electrolytic cell 210 is provided, and an electrolyte 220 is injected into the electrolytic cell 210 (step S110), wherein the electrolytic solution of the present invention The liquid 220 contains an inorganic acid 222 and a biological bacterium 224. Next, the metal object 240 and a target 250 are placed in the electrolytic cell 210, the metal object 240 is brought into contact with the electrolyte 220 with at least a portion of the target 250, and the liquid temperature of the electrolyte 220 is adjusted (step S120). In detail, the present invention provides a temperature control device 230 on one side of the electrolytic cell 210, and the temperature control device 230 can be a chiller. Therefore, the temperature control device 230 of the present invention can adjust the liquid temperature of the electrolyte 220. Between minus 20 degrees Celsius (°C) to 5 degrees Celsius (°C).

As described in step S130, the metal object 240 is electrically connected to the positive electrode of the power supply 270, and the target 250 is electrically connected to the negative electrode of the power supply 270, and the plate member 260 having a predetermined shape is placed in the electrolytic cell. The electrolyte 220 is contacted in 210 and the plate member 260 is electrically connected to the positive electrode of the power supply 270 (step S140). Finally, referring to FIG. 1 to FIG. 3 simultaneously, an operating voltage is applied from the power supply 270 to polish and form an oxide layer 241 on the surface of the metal object 240. The surface of the metal object 240 is formed with the pattern 260. A stereoscopic pattern corresponding to the predetermined shape is obtained (step S150).

The operating voltage value applied by the power supply 270 of the embodiment ranges from 5 volts to 32 volts, and the distance between the template 260 and the metal object 240 is no more than 5 cm. It should be noted that the embodiment The experimental parameters used are determined according to actual equipment conditions, and are not limited to the numerical values disclosed in the embodiment, and the placement position of the graphic member 260 is closer to the metal object 240, as in the metal object 240. The effect of forming a three-dimensional pattern on the surface is more remarkable. The graphic member 260 and the metal object 240 of the embodiment are almost disposed close to each other, and a portion of the graphic member 260 The metal article 240 is brought into contact with each other such that the plate member 260 is also electrically connected to the positive electrode of the power supply 270. The distance between the graphic member 260 and the metal object 240 defined by the present invention is not more than 5 cm, which is determined according to the maximum voltage value of 32 volts that the power supply 270 can provide. Those skilled in the art can follow the The maximum voltage value or operating power that the power supply 270 can provide to adjust the distance between the plate 260 and the metal object 240 is not limited to the numerical values of the embodiments disclosed in the present invention, as long as the conforming template 260 is As close as possible to the metal object 240, and the plate member 260 is electrically operated in connection with the positive electrode of the power supply 270, the texture and shape of the oxide layer 241 forming a three-dimensional pattern on the surface of the metal object 240 is more remarkable.

Further, the operation time of the anode treatment method according to the present invention is determined to determine the film thickness of the oxide layer 241 formed on the metal article 240, wherein the oxide layer 241 is a non-conductive and non-crystalline or crystalline material having a high hardness characteristic. The thickness of the oxide layer 241 is related to the roughness and color exhibited by the metal object 240. Roughness refers to results after the metal object 240 is subjected to an anode surface treatment process, such as pitting, coarsening, etching, polishing, and the like. The surface treatment process can change the surface characteristics of the metal article 240, such as hardness, acidity, flatness, and the like. The present invention can also determine the speed at which the oxide layer 241 is formed by adjusting the voltage difference between the positive and negative positive voltages V+ and the negative voltage V- of the power supply 270 (also referred to as the density of the film, wherein the dense Sexually related to the color of the metal object 240), the temperature of the liquid is slowed down by the temperature of the liquid.

If the material of the metal object 240 of the embodiment is one of metal materials such as stainless steel, aluminum alloy or aluminum-magnesium alloy, the material of the target 250 may be titanium alloy; or the material of the metal object 240 is titanium alloy, the target is The material of the material 250 is made of graphite material. The material selection of the metal object 240 and the target 250 described above is mainly to consider that there must be a potential difference between the materials electrically connected to the positive and negative ends of the power supply 270, so that during the anode processing, the target 250 of the negative electrode Ion Only sufficient driving force is transmitted to the surface of the metal object 240 of the positive electrode. However, those skilled in the art can select the materials of the positive and negative electrodes electrically connected to the power supply 270 according to actual needs, as long as there is a potential difference between the materials of the positive and negative electrodes, and this embodiment is not implemented. The material disclosed in the example is limited. The metal object 240 of the present invention may also be made of high carbon steel, low carbon steel, red copper, aluminum alloy, brass, magnesium alloy, aluminum magnesium alloy, brass alloy or the like. In addition, the material of the pattern member 260 of the present embodiment is a titanium alloy.

As can be clearly seen from Fig. 4A, the left side is the finished metal article 240 after the anode processing method of the present invention, and the right side is the used image member 260, and the three-dimensional pattern formed on the surface of the metal object 240 is the pattern member. The 260 is almost exactly the same shape. As in the experimental finished picture shown in FIGS. 4A and 4B, after passing through the anodizing method of the present invention, the target electrically connected to the negative electrode of the power supply source electrochemically reacts to obtain electrons and reduce hydrogen, which is released. The hydroxide ions are freed through the plate 260 and moved toward the metal object 240 that is electrically connected to the positive electrode. Since the graphic member 260 and the metal object 240 are electrically connected to the positive electrode of the power supply at the same time, the current is distributed to the surface of the metal object 240. The pattern member 260 will shield the electric field at the surface of the underlying metal object 240 such that the electric field distribution acts as a specific model depending on the structural shape of the pattern member 260, and the hydroxide ions are distributed at different rates in the metal object 240 according to the electric field distribution. The surface forms an oxide layer with the eluted metal ions. At the same time, the predetermined shape of the plate member 260 is also completely transferred onto the surface of the metal article 240, thereby forming an oxide layer of a three-dimensional pattern having the same texture as the plate member 260.

Further, the electrolytic solution 220 of the present invention adds the biological bacteria 224 to the inorganic acid agent 222. The volume ratio of the inorganic acid agent 222 to the biological bacteria 224 ranges from 20:1 to 60:1. The inorganic acid agent 222 is selected from the group consisting of phosphoric acid (H ₃ PO ₄ ), hydrochloric acid (HCl), sulfuric acid (H ₂ SO ₄ ), nitric acid (HNO ₃ ), boric acid (H ₃ BO ₃ ), hydrofluoric acid (HF), hydrogen. One of the groups of bromic acid (HBr), perchloric acid (HClO ₄ ), and the like, and the biological bacterium 224 are yeast, terramycin, photosynthetic bacteria, lactobacillus, bacilli, and compositions thereof. In addition, the biological bacterium 224 may also be a fermented dairy product such as sugar-free yogurt. It is to be noted that the inorganic acid agent 222 not mentioned in the present invention is within the scope of the present invention as long as the biological bacteria 224 can be added to form the electrolytic solution 220 used in the anodizing method.

As the cumulative number of uses increases, the metal ions released by the metal object 240 increase during the electrolysis process, resulting in a decrease in the electrical characteristics (e.g., resistance value) of the electrolyte 220 described above. In another embodiment, the resistance value of the electrolyte 220 can be detected by providing a constant voltage or a constant current. That is, in the constant current mode, different voltages can be obtained by multiplying the resistance value and the constant current, and the resistance value of the electrolyte 220 can be judged as the voltage changes, for example, when the voltage is lowered, it means that the metal ions increase, so that The resistance value of the electrolyte 220 is lowered. After a period of time, the voltage does not change any more, and it can be inferred that the amount of metal ions in the electrolyte 220 has reached saturation. The saturated electrolyte 220 should not effectively act on the metal object 240. The anode treatment method of the present invention generates high heat during operation, and in order to avoid deterioration of the electrolyte 220 by high heat, a temperature control device 230 such as an ice water circulation system is disposed outside the electrolytic cell 210 to cool the electrolyte 220 to a negative temperature of 10 ° C. .

In this embodiment, when the electrolyte 220 is unable to act on the metal object 240, the inorganic acid agent 222 may be further added to dilute the amount of metal ions, and the electrolyte 220 can be continuously and effectively The metal object 240 acts. Therefore, the electrolyte 220 of the present invention clearly solves the drawback that the conventional electrolyte can only be discarded and cannot be used. For the electrolyte 220, the resistance value was increased, and after the preparation, the high temperature autoclave was heated at 120 ° C for 1 hour, and the chemical bond was broken to increase the resistance value.

In another embodiment, the electrolyte 220 may additionally contain glycerin (C ₃ H ₈ O ₃ ) (or glycerol) in addition to the inorganic acid 222 and the biological bacteria 224. Glycerol forms a complex lipid with the inorganic acid agent 222. The volume ratio of the inorganic acid agent 222 to the glycerin is in the range of 4:1 to 3:1, but is not limited thereto. It is worth noting that glycerol may not participate in the electrolysis process, and the purpose of adding glycerol may be to dilute the amount of metal ions.

In another embodiment, the inorganic acid agent 222 can be phosphoric acid such that a phospholipid is formed in the electrolyte 220. Among them, phospholipid refers to a lipid containing phosphoric acid, which is a major component of a biofilm.

In another embodiment, in addition to the inorganic acid agent 222 and the biological bacteria 224, the electrolyte 220 may additionally add chitin ((C ₈ H ₁₃ O ₅ N) _n ) to further change the surface of the metal object 240. characteristic. In general, the present invention has a water-free reaction during the electropolishing process, so that the overall liquid temperature rise is not high after a period of electropolishing. Unlike the conventional aqueous polishing liquid, the present invention generates thermal energy during polishing, which deteriorates the aqueous polishing liquid. Further, the inorganic acid agent 222 reacts with the bond of the biological bacteria 224, but the glycerin does not participate in the reaction.

The present invention can adjust the surface treatment results by adjusting the types of the bacteria of the biological bacteria 224, the time of electrolysis, the voltage of electrolysis, the current of electrolysis, and the like, and can be adjusted according to actual needs.

Please refer to FIG. 5 in conjunction with FIG. 3, which is a flow chart of the steps of the metal surface patterned anode processing method according to the second embodiment of the present invention. After completing the anodic treatment of the first embodiment of the present invention, the metal object 240 further includes the following surface long oxide film step: immersing the metal object 240 formed with the oxide layer 241 in a low temperature electrolyte to perform surface oxide treatment at a low speed ( Step S160). Specifically, the metal object 240 having the three-dimensional oxide layer 241 is immersed in an extremely low temperature (-15 ° C) electrolyte to grow the oxide film and control the growth time of the oxide film at different times (4-24 hours). The thickness of the grown oxide film will be different in color.

In summary, the metal surface patterned anode treatment method and the anode treatment apparatus thereof of the present invention can directly transfer and form a pattern on the surface of the metal object without destroying the oxide layer formed by the anode treatment. The oxide layer of the three-dimensional pattern with a very similar shape retains the surface texture and gloss of the metal object itself, and also has the effect of material protection.

In addition, the anode treatment method and the anode treatment apparatus thereof of the present invention can chemically polish and surface the metal object in the same process, thereby greatly improving production efficiency and reducing manufacturing cost. Furthermore, the electrolyte proposed by the invention is environmentally friendly and non-toxic, and the electrical properties of the electrolyte can be reset by increasing the biological bacteria or by using different species and adjusting the number of strains, thereby achieving the purpose of repeated use.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (14)

A metal surface patterned anode treatment method for a metal object, the metal surface patterning method comprising the steps of: providing an electrolytic cell and injecting an electrolyte into the electrolytic cell, wherein the electrolyte comprises an inorganic An acid agent and a biological bacterium, wherein the biological bacterium is a yeast, a bacterium, a photosynthetic bacterium, a lactobacillus, a bacillus, a composition thereof, or a fermented dairy product; the metal object and a target are placed In the electrolytic cell, the metal object is brought into contact with the electrolyte with at least a portion of the target, and the liquid temperature of the electrolyte is adjusted, and the liquid temperature of the electrolyte is controlled between minus 20 degrees Celsius and 5 degrees Celsius; The object is electrically connected to a positive pole of a power supply, and electrically connects the target to a negative pole of the power supply; placing a plate member having a preset shape in the electrolytic bath and contacting the electrolyte, and The graphic plate is electrically connected to the positive electrode of the power supply, wherein a distance between the graphic member and the metal object is no more than 5 cm; and an operation is applied by the power supply And a voltage to polish and form an oxide layer on the surface of the metal object, the surface of the metal object forming a three-dimensional pattern corresponding to the predetermined shape of the template. The metal surface patterned anodizing method of claim 1, wherein the operating voltage value applied by the power supply ranges between 5 volts and 32 volts. The metal surface patterned anode treatment method according to claim 1, further comprising the following steps: The metal object on which the oxide layer is formed is immersed in a low-temperature electrolyte to perform surface oxide treatment at a low speed. A metal object having a pattern on the surface is produced by the anodizing method described in claim 1, wherein the surface of the metal object has a three-dimensional pattern corresponding to a predetermined shape of the pattern member. A metal surface patterned anode treatment apparatus for a metal object, the anode treatment apparatus comprising: an electrolytic tank storing an electrolyte, wherein the electrolyte comprises an inorganic acid agent and a biological bacteria, the metal object is Placed in the electrolytic cell, and at least a portion of the metal object contacts the electrolyte, wherein the biological bacteria are a yeast, a generation of bacteria, a photosynthetic bacteria, a lactobacillus, a bacillus, and a composition thereof, or a a fermented dairy product; a temperature control device disposed on one side of the electrolytic cell, wherein the temperature control device is configured to adjust a liquid temperature of the electrolyte, and the liquid temperature of the electrolyte is controlled between minus 20 degrees Celsius and 5 degrees Celsius; a target placed in the electrolytic cell, and at least a portion of the target contacts the electrolyte; a plate member having a predetermined shape, the plate member being placed in the electrolytic cell and contacting the electrolyte, Wherein the distance between the graphic member and the metal object is no more than 5 cm; and a power supply having a positive electrode and a negative electrode, the positive electrode being electrically connected to the metal object and the graphic member, the negative a pole is electrically connected to the target, and when the power supply applies an operating voltage, the metal object performs an electrochemical reaction in the electrolyte, An oxide layer is formed on the surface of the metal object, and a surface of the metal object is formed with a three-dimensional pattern corresponding to the preset shape of the template. The metal surface patterned anodizing apparatus of claim 5, wherein the volume ratio of the inorganic acid agent to the biological bacteria ranges from 20:1 to 60:1. The metal surface patterned anodizing apparatus of claim 5, wherein the operating voltage value ranges between 5 volts and 32 volts. The metal surface patterned anode treatment apparatus according to claim 5, wherein the metal object is made of stainless steel, aluminum alloy or aluminum-magnesium alloy, and the target material is titanium alloy. The metal surface patterned anode treatment apparatus according to claim 5, wherein the metal object is made of a titanium alloy, and the target material is graphite. The metal surface patterned anode processing apparatus of claim 5, wherein the pattern material is a titanium alloy. The metal surface patterned anode treatment apparatus according to claim 5, wherein the inorganic acid agent is selected from the group consisting of monophosphoric acid (H ₃ PO ₄ ), monohydrochloric acid (HCl), monosulfuric acid (H ₂ SO ₄ ), and a nitric acid. One of the groups of (HNO ₃ ), monoboric acid (H ₃ BO ₃ ), monohydrofluoric acid (HF), monohydrobromic acid (HBr), and perchloric acid (HClO ₄ ). The metal surface patterned anode treatment apparatus according to claim 11, further comprising a glycerin (C ₃ H ₈ O ₃ ) added to the inorganic acid agent, the glycerin forming the inorganic acid agent Compound lipids. The metal surface patterned anodizing apparatus of claim 12, wherein the volume ratio of the inorganic acid agent to the glycerol ranges from 4:1 to 3:1. The metal surface patterned anodizing apparatus according to claim 5, further comprising a chitin ((C ₈ H ₁₃ O ₅ N) _n ) added to the inorganic acid agent.