High-gloss manufacturing method and structure of magnesium alloy objects

Abstract

The present invention discloses a high-gloss manufacturing method and structure for magnesium alloy objects. The high-gloss manufacturing method for magnesium alloy objects includes the following steps: providing a magnesium alloy object; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object; using laser technology to remove the protective layer of the micro-arc oxidation / chemical conversion treatment on the surface of the magnesium alloy object to expose the metal surface; performing chemical conversion treatment on the laser-treated metal surface to passivate the magnesium alloy object; spraying conductive paint on the metal surface after laser and passivation treatments; painting the surface of the magnesium alloy object to protect the magnesium alloy object; cutting off a part of the magnesium alloy object to expose the metal body; passivating the activity of the magnesium alloy object with a special chemical conversion solution; and performing electrophoretic coating / ultraviolet light-curing paint spraying protection on the surface of the magnesium alloy object to achieve the anti-corrosion function. The present invention further provides a high-gloss treatment structure for magnesium alloy objects.

Description

[0001] Division Explanation

[0002] This application is a divisional application of the invention patent application with the application number 202010266116.5, the application date of April 7, 2020, and the invention title of "High-gloss Manufacturing Method and Structure of Magnesium Alloy Objects". Technical Field

[0003] The present invention relates to a high-gloss manufacturing method and structure of magnesium alloy objects for the housing of electronic devices. Background Art

[0004] The housing / case of an electronic device may include multiple structural components. For example, a laptop computer may include a display, a body, etc. The display may include an upper cover and a display body, and the body may include a keyboard cover and a bottom structure. The aforementioned body or cover may include various suitable materials.

[0005] The housing / case of an electronic device, such as the housing of a portable electronic device, has a high chance of frequent contact with other objects (such as a desktop, hand, ground, magnesium alloy object, etc.), resulting in deformation of the housing / case. Due to collision or friction, the housing / case may be worn, painted off, or the protective layer damaged, causing the metal object of the housing / case body to rust and unable to be protected, losing the aesthetic effect that attracts consumers visually. Summary of the Invention

[0006] One of the purposes of the present invention is to provide a high-gloss manufacturing method for magnesium alloy objects. After the magnesium alloy objects are subjected to high-gloss treatment, their corrosion resistance function can be improved.

[0007] Another purpose of the present invention is to provide a high-gloss structure of magnesium alloy objects obtained by the above method.

[0008] To achieve the above purposes, the present invention adopts the following technical means:

[0009] A high-gloss manufacturing method for magnesium alloy objects provided by the present invention includes the following steps:

[0010] Provide a magnesium alloy object;

[0011] Perform micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object;

[0012] Use laser technology to remove the protective layer of the micro-arc oxidation / chemical conversion treatment on the surface of the magnesium alloy object, exposing the metal surface;

[0013] Perform chemical conversion treatment on the laser-treated metal surface to passivate the magnesium alloy object;

[0014] Spray conductive paint on the metal surface after laser and passivation treatments;

[0015] Paint the surface of the magnesium alloy object to protect the magnesium alloy object;

[0016] Cut and remove part of the magnesium alloy object to expose the metal body;

[0017] Specialize it into a chemical solution to passivate the activity of the magnesium alloy object; and

[0018] Perform electrophoretic coating / ultraviolet light-cured paint spraying protection on the surface of the magnesium alloy object.

[0019] Among them, preferably, the chemical solution is a mixed solution of phosphate, zirconate, and organic / inorganic siloxane.

[0020] Furthermore, the present invention also proposes a high-gloss structure of a magnesium alloy object, including:

[0021] A magnesium alloy object, on the surface of which there is an oxide film. Remove part of the oxide film on the surface of the magnesium alloy object to expose a metal surface, and a conductive paint layer is provided on the metal surface;

[0022] A third paint layer is provided on the surface of the oxide film and the conductive paint layer to protect the magnesium alloy object;

[0023] Cut and remove part of the conductive paint layer and the third paint layer to expose a metal body, forming a cutting part; and

[0024] A fourth paint layer is formed on the surface of the magnesium alloy object to achieve the anti-corrosion function.

[0025] Among them, preferably, the raw materials of the third paint layer and the fourth paint layer are to provide a functional coating on the oxidized first surface, and the functional coating includes at least one polymer, and the at least one polymer is selected from the composition consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin or fluoropolymer.

[0026] Among them, preferably, the fourth paint layer formed on the surface of the magnesium alloy object covers the metal body of the magnesium alloy object, the conductive paint layer, and the third paint layer.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] After the present invention is subjected to MAO or chemical conversion treatment, then sprayed with conductive paint, and then subjected to CNC high-gloss treatment and coated with protective paint, the anti-corrosion effect can be achieved. Furthermore, the magnesium metal object is subjected to metal passivation protection on the high-gloss surface, and the passivation protection still maintains the original metal luster. In addition, a conductive layer is added to the magnesium metal object to increase the ED coverage area and enhance the anti-corrosion ability. Brief Description of the Drawings

[0029] Figure 1 It is the manufacturing flow chart of the first embodiment of the present invention;

[0030] Figure 2 It is the manufacturing flow chart of the second embodiment of the present invention;

[0031] Figure 3 It is the manufacturing flow chart of the third embodiment of the present invention;

[0032] Figure 4 It is the manufacturing flow chart of the fourth embodiment of the present invention;

[0033] Figures 5A to 5E It is the structural schematic diagram of the first embodiment of the present invention;

[0034] Figures 6A to 6G It is the structural schematic diagram of the second embodiment of the present invention;

[0035] Figures 7A to 7E It is the structural schematic diagram of the third embodiment of the present invention;

[0036] Figures 8A to 8E It is the structural schematic diagram of the fourth embodiment of the present invention;

[0037] Symbol Description:

[0038] 102 Magnesium alloy object 104 Oxide film

[0039] 106 First paint layer 108 Cutting part

[0040] 110 Second paint layer 112 Metal body

[0041] 202 Magnesium alloy object 204 Oxide film

[0042] 206 Metal surface 208 Conductive paint layer

[0043] 210 Third paint layer 212 Metal body

[0044] 214 Cutting part 216 Fourth paint layer

[0045] 302 Magnesium alloy object 304 Oxide film

[0046] 306 Fifth paint layer 308 Metal body

[0047] 310 Sixth paint layer 312 Cutting part

[0048] 402 Magnesium alloy object 404 Oxide film

[0049] 406 Conductive paint layer 408 Seventh paint layer

[0050] 410 Metal body 412 Eighth paint layer

[0051] 414 Cutting part Detailed implementation manner

[0052] The following describes the implementation manner of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification, and can also implement or apply it through other different specific embodiments.

[0053] The present invention provides a first embodiment of a high-gloss manufacturing method for a magnesium alloy object, including the following steps: providing a magnesium alloy object; performing micro-arc oxidation (MAO) or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, increasing the corrosion resistance; after micro-arc oxidation or chemical conversion treatment, painting the surface to present an appearance texture and protect the magnesium alloy object; performing CNC high-gloss treatment to cut off a part of the paint layer / passivation layer to expose the metal body and present a high-gloss bright surface; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics; and performing ED / UV painting protection on the surface of the magnesium alloy object processed in the previous two steps to achieve the anti-corrosion function.

[0054] The magnesium alloy object is, for example, a magnesium alloy substrate.

[0055] The present invention provides a second embodiment of a high-gloss manufacturing method for a magnesium alloy object, including the following steps: providing a magnesium alloy object; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, increasing the corrosion resistance; using laser technology to remove the micro-arc oxidation / chemical conversion protection layer on the surface of the magnesium alloy object to expose the metal surface; performing chemical conversion treatment on the metal surface after laser treatment to passivate the magnesium alloy object; spraying conductive paint on the surface after laser and passivation treatment; painting the surface of the magnesium alloy object to present an appearance texture and protect the magnesium alloy object; cutting off a part of the magnesium alloy object to expose the metal body and present a high-gloss bright surface; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics; and performing ED / UV painting protection on the surface of the magnesium alloy object processed in the previous two steps to achieve the anti-corrosion function.

[0056] The third embodiment provided by the present invention is a high-gloss manufacturing method for magnesium alloy objects, including the following steps: providing a magnesium alloy object; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, increasing the corrosion resistance; after the micro-arc oxidation or chemical conversion treatment, performing painting on the surface to present an appearance texture and protect the magnesium alloy object; performing CNC high-gloss treatment to cut off a partial paint layer / passivation layer to expose the metal body and present a high-gloss bright surface; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics; and performing all-UV painting protection on the surface of the magnesium alloy object to achieve the anti-corrosion function.

[0057] The fourth embodiment provided by the present invention is a high-gloss manufacturing method for magnesium alloy objects, including the following steps: providing a magnesium alloy object; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, increasing the corrosion resistance; after the micro-arc oxidation or chemical conversion treatment, spraying a conductive paint on the surface; after spraying the conductive paint, performing painting on the surface again to present the appearance texture of the magnesium alloy object; performing CNC high-gloss treatment to cut off a partial paint layer / passivation layer to expose the metal body to form a high-gloss plane and present a high-gloss bright surface, so that the high-gloss plane has a conductive material with conductive characteristics; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics; and using ED to protect the high-gloss surface to achieve the anti-corrosion function.

[0058] Advantages of the present invention: After the magnesium alloy object is subjected to MAO or chemical conversion treatment, then sprayed with a conductive paint, and then subjected to CNC high-gloss treatment and coated with a protective paint, the anti-corrosion effect can be achieved.

[0059] Micro-arc oxidation (MAO):

[0060] Micro-arc oxidation (MAO) is also known as plasma electrolytic oxidation. MAO can generate an oxide coating on a conductive material such as a metallic material. "Metallic material" means pure metal, metal alloy, intermetallic or metal-containing composite, etc. Metallic materials can include aluminum, magnesium, titanium, etc. MAO uses a high electromotive force so that discharge can occur and the resulting plasma can modify the structure of the oxide layer.

[0061] MAO can create micro-discharges on the surface of a metallic material immersed in an electrolyte. MAO treatment can be used to form a relatively thick and mostly crystalline oxide coating. The thickness of the coating can be, for example, dozens or hundreds of micrometers, but is not limited to any specific value. For example, depending on the requirements of the application and process, MAO coatings with larger or smaller thicknesses can be produced. The resulting micro-arc oxide coating can be dense and / or ductile and can have a relatively high hardness, especially as opposed to the oxide layer formed by anodic oxidation.

[0062] In contrast to deposition processing, MAO is a chemical conversion technology. The oxide layer formed as a result of MAO is the result of the oxidation of the underlying metal material object, rather than an oxide layer deposited on the object. Compared with deposition-based processing (such as spraying), MAO coatings can have higher adhesion to the underlying metal material object.

[0063] Chemical conversion treatment:

[0064] Chemical conversion treatment is a coating process that uses chemical or electrochemical treatment on the metal surface to obtain a metal compound coating, which has functions such as improving corrosion protection, paint bonding, metal coloring, and chemical polishing. There are many types of chemical conversion treatments, such as chromate treatment, phosphate treatment, non-chromium treatment, metal coloring, chemical polishing, and so on. Chemical conversion treatment has characteristics such as good corrosion resistance, good adsorption, good electrical insulation, and non-adhesion to molten metal. It is commonly used in chemical conversion treatment agents for steel, aluminum, zinc, stainless steel, copper, magnesium, etc.

[0065] CNC high-gloss treatment:

[0066] Computer Numerical Control (CNC) uses the process of inputting NC program instructions into the memory of the numerical control system, then compiling and calculating through a computer, and transmitting information to the drive through a displacement control system to drive the motor to machine the designed parts. Usually, a machine tool (tool machine) controlled by a computer is generally called CNC. For example, diamond tool machining, which uses a sharp natural diamond tool to machine soft metals such as aluminum alloy and copper alloy to obtain an ultra-precision turning technology with an optical mirror surface. Machining an optical metal mirror with a diamond tool can obtain a higher reflectivity. In addition, with the emergence of computer numerical control (CNC) ultra-precision lathes in recent years, the contour machining of aspherical mirrors has been better solved. Also, after the tool cuts on the metal surface, a high-gloss effect is achieved, presenting a metallic texture.

[0067] With the development of high-performance and high-precision CNC machine tools and diamond tools with excellent performance, the CNC high-gloss processing technology has made great breakthroughs, and the application of milling (turning) instead of grinding has been mature. The principle of CNC high-gloss processing is to use a diamond high-gloss tool on a precision CNC processing equipment, combined with scientific and reasonable cutting parameters and processes to achieve a shiny processed surface effect. The materials for CNC high-gloss processing can be acrylic, plexiglass, copper alloy, copper parts, aluminum alloy, aluminum materials, copper parts, magnesium alloy, zinc alloy, and so on.

[0068] Electrophoretic coating (electro - coating; ED):

[0069] Electrophoretic coating (electro - coating) is a coating method that uses an externally applied electric field to deposit pigments suspended in the electrophoretic solution on the surface of magnesium alloy objects. Electrophoretic coating has the characteristics of water - solubility, non - toxicity, and easy automation control, and has been widely applied in industries such as automobiles, building materials, hardware, and household appliances. The principle of electrophoretic coating is that the resin contained in the cathodic electrophoretic coating has basic groups, which are neutralized by acid to form salts and dissolve in water. After passing direct current, the acid - root negative ions move towards the anode, and the resin ions and the pigment particles they enclose carry positive charges and move towards the cathode and deposit on the cathode. This is the basic principle of electrophoretic coating (commonly known as painting). Electrophoretic coating is a very complex electrochemical reaction, and it is generally considered that at least four effects, namely electrophoresis, electrodeposition, electrolysis, and electroosmosis, occur simultaneously.

[0070] Characteristics of electrophoretic surface treatment technology: The electrophoretic paint film has the advantages of fullness, uniformity, flatness, and smoothness. The hardness, adhesion, corrosion resistance, impact resistance, and penetration performance of the electrophoretic paint film are significantly better than other coating processes.

[0071] UV (ultraviolet) paint:

[0072] UV paint is ultraviolet light - curable paint. UV paint generally refers to photo - curable coatings (photosensitive coatings), which use ultraviolet light as the energy source for coating curing and are also called ultraviolet light - curable coatings. It does not require heating and can quickly cure into a film on flammable substrates such as paper, plastic, leather, and wood. It is mainly composed of photosensitive resin, photosensitizer (photo - initiator), and diluent, and at the same time, some additives are added, such as heat stabilizers. When preparing colored paints, pigments and fillers are added. Photosensitive resins are generally low - molecular - weight resins with unsaturated bonds, such as unsaturated polyesters and acrylic oligomers; photosensitizers are compounds that are easy to absorb ultraviolet light to generate active free radicals, such as benzophenone and benzoin alkyl ethers; the main function of the diluent is to reduce the viscosity of the coating, and at the same time, it also participates in the curing to form a film, that is, an active diluent, such as styrene and acrylate. The advantages of photo - curable coatings are short curing time (from a fraction of a second to a few minutes), low curing temperature, and low volatile content, making them a new type of coating that saves energy, resources, is pollution - free, and has high efficiency.

[0073] Manufacturing method

[0074] The housing structure or a part thereof described herein can be manufactured or processed by a method involving any suitable number of processes. Figure 1 Illustrates the processes involved in an example of such a method. As Figure 1The manufacturing method shown may include treating a first surface of an object including a metallic material with MAO (S101). The oxidation process may involve any suitable process(es). Depending on the materials and techniques involved, any suitable oxidation parameters may be employed. Unless explicitly stated herein, the terms "first", "second", "third", etc. are merely used herein to show that the respective objects described by these terms are independent entities and are not intended to imply any sense of arrangement order.

[0075] Please refer to Figure 1 As shown, the present invention provides a first embodiment of a high-gloss manufacturing method for a magnesium alloy object, including the following steps: providing a magnesium alloy object (S102); performing micro-arc oxidation (MAO) or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, thereby increasing the corrosion resistance (S104); after the micro-arc oxidation or chemical conversion treatment, performing painting on the surface to present an appearance texture and protect the magnesium alloy object (S106); performing CNC high-gloss treatment to cut away a part of the paint to form a first paint layer / passivation layer, exposing the metal body, and presenting a high-gloss bright surface (S108); using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-brightness characteristic (S110); and performing ED / UV painting protection on the surface of the magnesium alloy object processed in the previous two steps to achieve a corrosion resistance function (S112). Among them, the CNC high-gloss treatment is to achieve a high gloss effect after the tool cuts on the metal surface, presenting a metallic texture. Electrophoretic coating (ED) is a coating method in which an external electric field causes pigments suspended in the electrophoretic solution to deposit on the surface of the magnesium alloy object. UV paint is a paint cured by ultraviolet light. This will not be repeated hereinafter.

[0076] Please refer to Figure 2 As shown, the present invention provides a second embodiment of a high-gloss manufacturing method for a magnesium alloy object, including the following steps: providing a magnesium alloy object (S202); performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object to form an oxide film on the surface of the magnesium alloy object, thereby increasing the corrosion resistance (S204); using laser technology to remove the protective layer of the micro-arc oxidation / chemical conversion treatment on the surface of the magnesium alloy object, exposing the metal surface (S206); performing chemical conversion treatment on the metal surface after laser treatment to passivate the magnesium alloy object (S208); spraying conductive paint on the metal surface after laser and passivation treatments (S210); performing painting on the surface of the magnesium alloy object to form a second paint layer to present an appearance texture and protect the magnesium alloy object (S212); cutting away a part of the magnesium alloy object to expose the metal body and presenting a high-gloss bright surface (S214); using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-brightness characteristic (S216); and performing ED / UV painting protection on the surface of the magnesium alloy object processed in the previous two steps to achieve a corrosion resistance function (S218).

[0077] Please refer to Figure 3As shown in the figure, the present invention provides a third embodiment of a high-gloss manufacturing method for a magnesium alloy object, which includes the following steps: providing a magnesium alloy object S302; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object, generating an oxide film on the surface of the magnesium alloy object to increase the corrosion resistance S304; after the micro-arc oxidation or chemical conversion treatment, spraying paint on the surface to form a third paint layer to present the appearance texture and protect the magnesium alloy object S306; performing CNC high-gloss treatment, cutting off the local paint / passivation layer to expose the metal body and presenting a high-gloss bright surface S308; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics S310; and spraying UV paint on the entire surface of the magnesium alloy object to achieve the anti-corrosion function S312. The difference between the third embodiment and the first embodiment is that the entire surface of the magnesium alloy object is protected by spraying UV paint to achieve the anti-corrosion function.

[0078] Please refer to Figure 4 As shown in the figure, the present invention provides a fourth embodiment of a high-gloss manufacturing method for a magnesium alloy object, which includes the following steps: providing a magnesium alloy object S402; performing micro-arc oxidation or chemical conversion treatment on the magnesium alloy object, generating an oxide film on the surface of the magnesium alloy object to increase the corrosion resistance S404; after the micro-arc oxidation or chemical conversion treatment, spraying conductive paint on the surface S406; after spraying the conductive paint, spraying paint on the surface again to form a fourth paint layer to present the appearance texture of the magnesium alloy object S408; performing CNC high-gloss treatment, cutting off the local paint to form a fifth paint layer / passivation layer, exposing the metal body to form a high-gloss plane and presenting a high-gloss bright surface, so that the high-gloss plane has a conductive material with conductive characteristics S410; using a special chemical conversion solution, such as a phosphate, zirconate, organic / inorganic siloxane mixed solution, to passivate the activity of the magnesium alloy object and maintain the high-gloss characteristics S412; and using ED to protect the high-gloss surface to achieve the anti-corrosion function S414.

[0079] Advantages of the present invention: After MAO or chemical conversion treatment, then spraying conductive paint, followed by CNC high-gloss treatment and coating with protective paint, the anti-corrosion effect can be achieved. Furthermore, metal passivation protection is performed on the high-gloss surface of the magnesium metal object, and the passivation protection still maintains the original metal luster. In addition, a conductive layer is added to the magnesium metal object to increase the ED coverage area and enhance the anti-corrosion ability.

[0080] Please refer to Figures 5A to 5E As shown in the figure, corresponding to Figure 1, the high-gloss structure of the magnesium alloy object corresponding to the first embodiment of the present invention is to perform micro-arc oxidation (MAO) or chemical conversion treatment on the magnesium alloy object 102, and an oxide film 104 is formed on the surface of the magnesium alloy object 102, which can improve and increase the corrosion resistance. A first paint layer 106 is sprayed on the surface of the magnesium alloy object 102 after micro-arc oxidation or chemical conversion treatment. In one embodiment, a functional coating (first paint layer) is provided on the oxidized first surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin or fluoropolymer, etc., in order to present an appearance texture and protect the surface of the magnesium alloy object 102. Then, CNC high-gloss treatment is carried out to cut off a part of the first paint layer 106 / passivation layer (oxide layer) 104 of the magnesium alloy object 102, expose the metal body, and present a high-gloss bright surface. With a special chemical conversion solution, such as phosphate, zirconate, organic / inorganic siloxane mixed solution, passivate the activity of the magnesium alloy object 102 and maintain the high-brightness characteristics. The surface of the magnesium alloy object 102 processed in the previous two steps is subjected to ED / UV spraying to form a second paint layer 110 for protection, achieving the anti-corrosion function.

[0081] An oxide film 104 is provided on the surface of the magnesium alloy object 102 to improve and increase the corrosion resistance. A first paint layer 106 is applied on the magnesium alloy object 102 having the oxide film 104. In one embodiment, a functional coating (first paint layer) is provided on the oxidized first surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin or fluoropolymer, etc., in addition to showing an appearance texture and protecting the surface of the magnesium alloy object 102. A part of the first paint layer 106 / oxide layer (passivation layer) 104 is cut off from the magnesium alloy object 102 to expose the metal body 112, form a cutting part 108, and present a high-gloss bright surface. A second paint layer 110 is provided outside the cutting part 108. In one embodiment, a functional coating (second paint layer) is provided on the oxidized first surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin or fluoropolymer, etc., covering the metal body 112 and the oxide film 104 of the magnesium alloy object 102 to achieve the anti-corrosion function.

[0082] Please refer to Figures 6A to 6G as shown, corresponding to Figure 2 , the present invention is a high-gloss structure of a magnesium alloy object corresponding to the second embodiment. Micro-arc oxidation or chemical conversion treatment is performed on the magnesium alloy object 202, and an oxide film 204 is formed on the surface of the magnesium alloy object 202 to increase the corrosion resistance. Laser technology is used to remove part of the protective layer (oxide film 204) of the micro-arc oxidation / chemical conversion treatment on the surface of the magnesium alloy object 202, exposing the metal surface 206. The metal surface 206 after laser treatment is subjected to chemical conversion treatment to passivate the magnesium alloy object 202. A conductive paint layer 208 is sprayed on the metal surface after laser and passivation treatments. Painting is performed on the surfaces of the oxide film 204 and the conductive paint layer 208 to present an appearance texture, forming a third paint layer 210. In one embodiment, a functional coating (third paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc., and protects the magnesium alloy object 202. Part of the conductive paint layer 208 and the third paint layer 210 are cut away to expose the metal body 212, forming a cut portion 214 and presenting a high-gloss bright surface. A special chemical conversion solution, such as a phosphate, zirconate, or organic / inorganic siloxane mixed solution, is used to passivate the activity of the magnesium alloy object and maintain the high-brightness characteristic. The surface of the magnesium alloy object 202 processed in the previous two steps is subjected to ED / UV painting protection to form a fourth paint layer 216, achieving the anti-corrosion function.

[0083] An oxide film 204 is provided on the surface of the magnesium alloy object 202 to increase the corrosion resistance. The protective layer (oxide film 204) on the surface of the magnesium alloy object 202 is removed, exposing the metal surface 206. A conductive paint layer 208 is provided on the metal surface 206. A third paint layer 210 is provided on the surfaces of the oxide film 204 and the conductive paint layer 208 and protects the magnesium alloy object 202. Part of the conductive paint layer 208 and the third paint layer 210 are cut away to expose the metal body 212, forming a cut portion 214 and presenting a high-gloss bright surface. A fourth paint layer 216 is formed on the surface of the magnesium alloy object 202 to cover the metal body 212 and the conductive paint layer 208 of the magnesium alloy object 202. The fourth paint layer 216, in one embodiment, a functional coating (fourth paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc., without being limited thereto, achieving the anti-corrosion function.

[0084] Please refer to Figures 7A to 7E as shown, corresponding to Figure 3 , the present invention is a high-gloss structure of a magnesium alloy object corresponding to the third embodiment. The magnesium alloy object 302 is subjected to micro-arc oxidation or chemical conversion treatment, and an oxide film 304 is formed on the surface of the magnesium alloy object 302 to increase the corrosion resistance. After the micro-arc oxidation or chemical conversion treatment, painting is performed on the surface to form a fifth paint layer 306. In one embodiment, a functional coating (fifth paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc., presenting an appearance texture and protecting the magnesium alloy object. CNC high-gloss treatment is performed to cut off a part of the fifth paint layer 306 / passivation layer (oxide film 304) to expose the metal body 308 and present a highly glossy bright surface. A special chemical conversion solution, such as a phosphate, zirconate, or organic / inorganic siloxane mixed solution, is used to passivate the activity of the magnesium alloy object 302 and maintain the highly glossy characteristic. The entire surface of the magnesium alloy object 302 is UV painted to form a sixth paint layer 310. In one embodiment, a functional coating (sixth paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of: polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc. for protection, not limited thereto, to achieve the anti-corrosion function.

[0085] An oxide film 304 is provided on the surface of the magnesium alloy object 302 to increase the corrosion resistance. A fifth paint layer 306 is applied on the magnesium alloy object 302 provided with the oxide film 304, which not only presents an appearance texture but also protects the surface of the magnesium alloy object 302. A part of the fifth paint layer 306 / oxide layer (passivation layer) 304 is cut off from the magnesium alloy object 302 to expose the metal body 308, forming a cutting part 312 and presenting a highly glossy bright surface. A sixth paint layer 310 is provided outside the cutting part 312 to cover the metal body 308, the oxide film 304, and the paint layer 306 of the magnesium alloy object 302, not limited thereto, to achieve the anti-corrosion function.

[0086] Please refer to Figures 8A to 8E as shown, corresponding to Figure 4, the present invention is a high-gloss structure of a magnesium alloy object corresponding to the fourth embodiment. The magnesium alloy object 402 is subjected to micro-arc oxidation or chemical conversion treatment, and an oxide film 404 is formed on the surface of the magnesium alloy object 402 to increase the corrosion resistance. After the micro-arc oxidation or chemical conversion treatment, a conductive paint is sprayed on the surface to form a conductive paint layer 406. After spraying the conductive paint layer 406, paint is applied on the surface again to form a seventh paint layer 408. In one embodiment, a functional coating (seventh paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc., presenting the appearance texture of the magnesium alloy object. Through CNC high-gloss treatment, a part of the seventh paint layer 408 / conductive paint layer 406 / passivation layer (oxide film) 404 is cut away to form a cutting part 414, exposing the metal body 410 to form a high-gloss plane, and presenting a highly glossy bright surface, so that the high-gloss plane has a conductive material with conductive characteristics. Using a special chemical conversion solution, such as phosphate, zirconate, or an organic / inorganic silicone hybrid solution, the activity of the magnesium alloy object 402 is passivated, and the high-gloss characteristic is maintained. The ED is used to form an eighth paint layer 412 to protect the high-gloss surface and achieve the anti-corrosion function.

[0087] An oxide film 404 is provided on the surface of the magnesium alloy object 402 to increase the corrosion resistance. A conductive paint layer 406 is provided on the magnesium alloy object 402 provided with the oxide film 404. A seventh paint layer 408 is formed on the surface of the conductive paint layer 406, presenting an appearance texture. A part of the seventh paint layer 408 / conductive paint layer 406 / passivation layer (oxide film) 404 is cut away to form a cutting part 414, exposing the metal body 410 to form a high-gloss plane, and presenting a highly glossy bright surface, so that the high-gloss plane has a conductive material with conductive characteristics. The ED is used to form an eighth paint layer 412. In one embodiment, a functional coating (eighth paint layer) is provided on the first oxidized surface, and the functional coating includes at least one polymer selected from the group consisting of polystyrene, polyimide, polypropylene ether, polyurethane, methyl sesquisiloxane, polyethylene, polystyrene silicone, butyl rubber, polyamide, polycarbonate, styrene-butadiene rubber, polyacrylate, epoxy resin, or fluoropolymer, etc. to protect the high-gloss surface. The eighth paint layer 412 is provided outside the cutting part 414 to cover the metal body 410 and the oxide film 404 and the conductive paint layer 406 of the magnesium alloy object 402, not limited thereto, to achieve the anti-corrosion function.

[0088] Advantages of the present invention: After being treated by MAO or chemical conversion, and then sprayed with conductive paint, followed by CNC high-gloss treatment and coated with protective paint, the anti-corrosion effect can be achieved. Moreover, the magnesium metal object is passivated and protected on the high-gloss surface, and the passivation protection still maintains the original metallic luster. In addition, a conductive layer is added to the magnesium metal object to increase the ED coverage area and enhance the anti-corrosion ability.

Claims

1. A high-gloss manufacturing method for a magnesium alloy object, characterized in that, it includes the following steps: Provide a magnesium alloy object; Perform micro-arc oxidation or chemical conversion treatment on the magnesium alloy object, and an oxide film is formed on the surface of the magnesium alloy object; Use laser technology to remove the protective layer of the micro-arc oxidation / chemical conversion treatment on the surface of the magnesium alloy object, exposing the metal surface; Perform chemical conversion treatment on the metal surface after laser treatment to passivate the magnesium alloy object; Spray conductive paint on the metal surface after laser and passivation treatments; Paint the surface of the magnesium alloy object to protect the magnesium alloy object; Cut away part of the magnesium alloy object to expose the metal body; Use a chemical conversion solution to passivate the activity of the magnesium alloy object. Among them, the chemical conversion solution is a mixed solution of phosphate, zirconate, and organic / inorganic siloxane; and Perform electrophoretic coating / ultraviolet light-curing paint spraying protection on the surface of the magnesium alloy object.

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