阅读说明：本技术 一种真空溅镀结合电泳涂装技术加工微弧氧化工件的工艺 (Process for machining micro-arc oxidized workpiece by vacuum sputtering and electrophoretic coating technology ) 是由 段宗范 赵志辉 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种真空溅镀结合电泳涂装技术加工微弧氧化工件的工艺,准备一定量的甲基丙烯酸六氟丁酯,以甲基丙烯酸六氟丁酯作为共聚单体,采用乳液聚合法得到聚丙烯酸氟代烷基酯树脂,进行“内嵌合外包裹”的微弧氧化/氟改性丙烯酸树脂复合涂层制备,采用真空溅镀的方式结合电泳涂装的方式将微弧氧化/氟改性丙烯酸树脂复合涂层镀到微弧氧化工件的外表面。本发明所述的一种真空溅镀结合电泳涂装技术加工微弧氧化工件的工艺,将微弧氧化工艺代替传统的磷化工艺作为电泳的前处理工序,使微弧氧化和电泳工艺结合来制备微弧电泳复合膜层,可以简化传统磷化电泳工艺,使无机的氧化物陶瓷层和有机的电泳涂层相结合,提高耐蚀性。(The invention discloses a process for processing a micro-arc oxidation workpiece by combining vacuum sputtering and electrophoretic coating, which comprises the steps of preparing a certain amount of hexafluorobutyl methacrylate, obtaining a poly (fluoroalkyl acrylate) resin by using the hexafluorobutyl methacrylate as a comonomer through an emulsion polymerization method, preparing an 'embedded and externally wrapped' micro-arc oxidation/fluorine modified acrylic resin composite coating, and plating the micro-arc oxidation/fluorine modified acrylic resin composite coating on the outer surface of the micro-arc oxidation workpiece by combining a vacuum sputtering mode and an electrophoretic coating mode. According to the process for processing the micro-arc oxidation workpiece by combining the vacuum sputtering and the electrophoretic coating, the micro-arc oxidation process replaces the traditional phosphating process as the pretreatment process of electrophoresis, and the micro-arc oxidation and the electrophoretic process are combined to prepare the micro-arc electrophoretic composite film, so that the traditional phosphating electrophoretic process can be simplified, an inorganic oxide ceramic layer and an organic electrophoretic coating are combined, and the corrosion resistance is improved.)

1. A process for processing a micro-arc oxidation workpiece by combining a vacuum sputtering coating technology and an electrophoretic coating technology is characterized by comprising the following steps: the method comprises the following operation steps:

s1: preparation of materials: preparing a certain amount of hexafluorobutyl methacrylate, wherein the hexafluorobutyl methacrylate is a chemical substance and is used for preparing a novel coating with high weather resistance, stain resistance and self-cleaning property;

s2: hexafluorobutyl methacrylate is used as a comonomer, a poly (fluoroalkyl acrylate) resin is synthesized by an emulsion polymerization method, the influence of factors such as the mass ratio of the monomers, the composition and the dosage of an emulsifier, the temperature, the stirring speed and the like on the performances such as the thermal stability, the chemical stability, the hydrophobicity and the like of the fluorine modified acrylic resin emulsion is researched, and the boundary conditions of the preparation process on all parameters of a stable system of the fluorine modified acrylic resin emulsion are optimized;

s3: determining boundary conditions of system parameters of micro-arc induction of the anode surface of the micro-arc oxidation workpiece under a non-alkaline electrolyte system by using the correlation of micro-arc discharge front and rear interelectrode electric field parameters, OH-ion concentration and oxidation time and the micropore structure of the ceramic layer and oxygen ionization strength, establishing a mathematical physical model between micro-arc plasma induction and electrolyte and energy output modes, and providing theoretical basis and test support of the system for the matching of the non-alkaline micro-arc oxidation electrolyte of the micro-arc oxidation workpiece;

s4: the preparation of the micro-arc oxidation/fluorine modified acrylic resin composite coating with embedded combination and external wrapping is carried out by utilizing the adjustability of the anode reaction sequence of OH- ", reaction thickening and oxygen evolution ionization densification and the construction function of current waveform on the blind microporous structure on the surface of the ceramic layer and combining the preparation principle of an electrophoretic organic coating;

s5: depositing magnesium oxide porous film layers with different thicknesses and microporous structures on the surface of the magnesium alloy in advance by adjusting and controlling an electrical parameter output mode, selecting a proper electrolyte system and the like, measuring the structure and the thickness of the film layers by means of scanning electron microscope analysis, testing and quantifying the conductive characteristics of the film layers by electrochemical alternating current impedance, and determining the influence of the electrolyte and the energy output mode on the structure and the electrical properties of the magnesium oxide porous film layers;

s6: parameters such as current, voltage, duty ratio, working mode, dispersion condition and the like are changed, and the matching property of the micro-arc oxidation coating and the fluorine modified acrylic resin electrophoretic coating is improved;

s7: plating the micro-arc oxidation/fluorine modified acrylic resin composite coating on the outer surface of the micro-arc oxidation workpiece by adopting a vacuum sputtering mode and an electrophoretic coating mode, and processing the micro-arc oxidation/fluorine modified acrylic resin composite coating.

2. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: in the step S2, the fluorinated alkyl acrylate resin can be obtained by introducing fluorine-containing groups into the acrylate polymer, the fluorine electronegativity is large, the C-F bond is very stable, the fluorine-containing side chain is oriented outwards, shielding protection can be formed on the main chain and the internal covalent bond, the original characteristics of the acrylic resin are maintained through the modified acrylic resin, and the chemical inertness, weather resistance, dirt resistance, water resistance and oil resistance of the polymer coating are improved.

3. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: the consumption mechanism of OH-ions in the aqueous solution of the micro-arc oxidation workpiece under the micro-arc oxidation condition comprises hydroxide generation consumption and oxygen precipitation consumption.

4. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: the appearance characteristic of blind micropores uniformly distributed on the surface of the micro-arc oxidation workpiece is beneficial to electrophoretic coating, and the oxidation time can be reduced from 10-15min of single micro-arc oxidation treatment to 3-5 min.

5. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: in the step S4, the micro-arc oxidation and electrophoresis process are combined to prepare the micro-arc electrophoresis composite film of the micro-arc oxidation workpiece, the forming mechanism of the micro-arc electrophoresis composite film is researched, and the corrosion resistance can be improved by combining the inorganic oxide ceramic layer and the organic point coating.

6. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: the ceramic layer formed by micro-arc oxidation of the micro-arc oxidation workpiece is loose and porous, and cannot meet the requirements of practical application in terms of corrosion resistance, but the ceramic layer better meets the requirements of electrophoretic coating on a substrate.

7. The process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating technology as claimed in claim 1, wherein the process comprises the following steps: the electrophoretic coating in the step S7 is a new technology generated by combining electrochemistry and polymer chemistry, and is characterized in that a coated object is soaked in a water-soluble coating, is connected with an external direct current power supply to be used as an anode, is additionally provided with a cathode corresponding to the anode, and is electrified between the two electrodes, so that the water-soluble coating is uniformly deposited on the surface of the coated object by virtue of an electrochemical reaction generated by electric energy.

8. The process for processing the micro-arc oxidized workpiece by the vacuum sputtering and electrophoretic coating technology according to claim 7, wherein the micro-arc oxidized workpiece comprises the following steps: the electrophoretic coating comprises four processes of electrophoresis, electrolysis, electrodeposition and electroosmosis which are carried out simultaneously, and the electrophoresis type is divided into two coating methods of anode electrophoresis and cathode electrophoresis.

Technical Field

The invention relates to the field of micro-arc oxidation workpiece processing, in particular to a process for processing a micro-arc oxidation workpiece by combining a vacuum sputtering coating technology and an electrophoretic coating technology.

Background

The process for processing the micro-arc oxidation workpiece is a method for carrying out composite processing on the micro-arc oxidation workpiece, and the main reason for poor corrosion resistance of the magnesium alloy micro-arc oxidation layer is that a ceramic layer is loose and porous, and the surface activity is high, so that the corrosion resistance and other characteristics of an oxidation film are reduced. Therefore, the subsequent treatment of the magnesium alloy after micro-arc oxidation is particularly important, fortunately, the ceramic layer surface of the magnesium alloy after micro-arc oxidation has the porous characteristic, which provides possibility for the further treatment of the micro-arc magnesium oxide alloy, and along with the continuous development of science and technology, the manufacturing process requirements of people for the process of processing the micro-arc oxidized workpiece are higher and higher.

In the prior art, a patent with an authorization publication number of CN200710131370.9 discloses a vacuum sputtering EMI film and electrophoretic coating processing technology for a micro-arc oxidized workpiece, which comprises the steps of selecting a base material → surface pretreatment of the base material → micro-arc oxidation treatment → EMI film sputtering treatment → electrophoretic coating treatment, and firstly carrying out surface pretreatment and micro-arc oxidation treatment on the selected base material to obtain a micro-arc oxidized workpiece; cleaning the micro-arc oxidized workpiece, and then plating a metal layer on the surface of the micro-arc oxidized workpiece through EMI sputtering treatment so that the surface of the micro-arc oxidized workpiece has EMI resistance and electrical conductivity; firstly, phosphorization electrophoresis improves the corrosion resistance of magnesium alloy to a certain degree, but the improvement range is small, the magnesium alloy sample after micro-arc oxidation treatment and copper connection corrosion begin to generate corrosion points in about 48 hours of a salt spray test, the actual application requirement is difficult to achieve, the use of people is not facilitated, the water resistance and oil resistance are poor, the high and low temperature resistance, the pollution resistance and weather resistance are unsatisfactory, certain adverse effects are brought to the use process of people, and therefore, the process for processing the micro-arc oxidation workpiece by combining vacuum sputtering and coating electrophoresis technology is provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a process for processing a micro-arc oxidation workpiece by combining a vacuum sputtering and an electrophoretic coating technology, wherein the micro-arc oxidation technology replaces the traditional phosphating technology to be used as a pretreatment process of electrophoresis, and the micro-arc oxidation and the electrophoretic technology are combined to prepare a micro-arc electrophoretic composite film layer, so that the traditional phosphating electrophoretic technology can be simplified, an inorganic oxide ceramic layer and an organic electrophoretic coating are combined, the corrosion resistance is improved, and the problems in the background technology can be effectively solved.

(II) technical scheme

In order to achieve the purpose, the invention adopts the technical scheme that: a process for processing a micro-arc oxidized workpiece by combining a vacuum sputtering and an electrophoretic coating technology comprises the following operation steps:

s1: preparation of materials: preparing a certain amount of hexafluorobutyl methacrylate, wherein the hexafluorobutyl methacrylate is a chemical substance and is used for preparing a novel coating with high weather resistance, stain resistance and self-cleaning property;

s2: hexafluorobutyl methacrylate is used as a comonomer, a poly (fluoroalkyl acrylate) resin is synthesized by an emulsion polymerization method, the influence of factors such as the mass ratio of the monomers, the composition and the dosage of an emulsifier, the temperature, the stirring speed and the like on the performances such as the thermal stability, the chemical stability, the hydrophobicity and the like of the fluorine modified acrylic resin emulsion is researched, and the boundary conditions of the preparation process on all parameters of a stable system of the fluorine modified acrylic resin emulsion are optimized;

s3: determining boundary conditions of system parameters of micro-arc induction of the anode surface of the micro-arc oxidation workpiece under a non-alkaline electrolyte system by using the correlation of micro-arc discharge front and rear interelectrode electric field parameters, OH-ion concentration and oxidation time and the micropore structure of the ceramic layer and oxygen ionization strength, establishing a mathematical physical model between micro-arc plasma induction and electrolyte and energy output modes, and providing theoretical basis and test support of the system for the matching of the non-alkaline micro-arc oxidation electrolyte of the micro-arc oxidation workpiece;

s4: the preparation of the micro-arc oxidation/fluorine modified acrylic resin composite coating with embedded combination and external wrapping is carried out by utilizing the adjustability of the anode reaction sequence of OH- ", reaction thickening and oxygen evolution ionization densification and the construction function of current waveform on the blind microporous structure on the surface of the ceramic layer and combining the preparation principle of an electrophoretic organic coating;

s5: depositing magnesium oxide porous film layers with different thicknesses and microporous structures on the surface of the magnesium alloy in advance by adjusting and controlling an electrical parameter output mode, selecting a proper electrolyte system and the like, measuring the structure and the thickness of the film layers by means of scanning electron microscope analysis, testing and quantifying the conductive characteristics of the film layers by electrochemical alternating current impedance, and determining the influence of the electrolyte and the energy output mode on the structure and the electrical properties of the magnesium oxide porous film layers;

s6: parameters such as current, voltage, duty ratio, working mode, dispersion condition and the like are changed, and the matching property of the micro-arc oxidation coating and the fluorine modified acrylic resin electrophoretic coating is improved;

s7: plating the micro-arc oxidation/fluorine modified acrylic resin composite coating on the outer surface of the micro-arc oxidation workpiece by adopting a vacuum sputtering mode and an electrophoretic coating mode, and processing the micro-arc oxidation/fluorine modified acrylic resin composite coating.

As a preferable technical scheme, in the step S2, the fluorinated alkyl acrylate resin can be obtained by introducing a fluorine-containing group into an acrylate polymer, the fluorine electronegativity is large, the C-F bond is very stable, the fluorine-containing side chain is oriented outwards, shielding protection can be formed on the main chain and the internal covalent bond, the original characteristics of the acrylic resin are maintained through the modified acrylic resin, and the chemical inertness, weather resistance, stain resistance, oil resistance and water resistance of a polymer coating are improved.

As a preferable technical scheme, the consumption mechanism of OH-ions in the aqueous solution of the micro-arc oxidation workpiece under the micro-arc oxidation condition comprises hydroxide generation consumption and oxygen precipitation consumption.

As a preferable technical scheme, the appearance characteristics of blind micropores uniformly distributed on the surface of the micro-arc oxidation workpiece are beneficial to electrophoretic coating, and the oxidation time can be reduced to 3-5min from 10-15min of single micro-arc oxidation treatment.

As a preferred technical scheme, in the step S4, the micro-arc oxidation and electrophoresis processes are combined to prepare the micro-arc electrophoresis composite film layer of the micro-arc oxidized workpiece, the formation mechanism of the micro-arc electrophoresis composite film layer is studied, and the corrosion resistance can be improved by combining the inorganic oxide ceramic layer with the organic dot coating.

As a preferred technical scheme, a ceramic layer formed by micro-arc oxidation of the micro-arc oxidation workpiece is loose and porous, and cannot meet the requirements of practical application in terms of corrosion resistance, but the ceramic layer better meets the requirements of electrophoretic coating on a substrate.

In a preferred embodiment, the electrophoretic coating in step S7 is a new technology combining electrochemistry and polymer chemistry, and is to immerse the substrate in the water-soluble coating, connect with an external dc power supply as an anode, and provide a cathode corresponding thereto, and apply dc power between the two electrodes, and make the water-soluble coating uniformly deposited on the surface of the substrate by means of the electrochemical reaction generated by the electric energy.

As a preferable technical scheme, the electrophoretic coating comprises four processes of electrophoresis, electrolysis, electrodeposition and electroosmosis which are carried out simultaneously, and the electrophoresis type is divided into two coating methods of anode electrophoresis and cathode electrophoresis.

(III) advantageous effects

Compared with the prior art, the invention provides a process for processing a micro-arc oxidized workpiece by combining a vacuum sputtering and an electrophoretic coating technology, which has the following beneficial effects: according to the process for processing the micro-arc oxidized workpiece by combining the vacuum sputtering and the electrophoretic coating, the micro-arc oxidation process replaces the traditional phosphating process to be used as a pretreatment process of electrophoresis, the micro-arc oxidation and the electrophoretic process are combined to prepare the micro-arc electrophoretic composite film, the traditional phosphating electrophoretic process can be simplified, an inorganic oxide ceramic layer is combined with an organic electrophoretic coating to improve corrosion resistance, hexafluorobutyl methacrylate is used as a comonomer, and a core-shell emulsion polymerization method is adopted to synthesize the polyfluoroalkyl acrylate resin to improve the performances of the acrylic resin coating such as chemical inertness, weather resistance, dirt resistance, oil resistance and water resistance. Meanwhile, the morphological characteristics of blind micropores uniformly distributed on the surface of the magnesium alloy micro-arc oxidation ceramic layer are utilized to meet the requirement of electrophoretic coating on a substrate, the micro-arc oxidation process replaces the traditional phosphating process to be used as a pretreatment process of electrophoresis, the micro-arc oxidation and electrophoretic coating processes are combined to prepare the magnesium alloy micro-arc oxidation/fluorine modified acrylic resin electrophoretic composite coating, the influence of the electrophoresis process and the curing mode on the binding force and the corrosion resistance of the composite coating is researched, a theoretical model of the preparation process of the magnesium alloy micro-arc oxidation and electrophoretic coating and the composite coating film forming process is established, the influence rule and mechanism of relevant factors on the microstructure and the physicochemical property of the coating in the composite process of the micro-arc oxidation and fluorine modified acrylic resin electrophoretic coating are clarified, theoretical guidance is provided for preparing the micro-arc electrophoretic composite coating with excellent corrosion resistance and decoration, and the whole process for processing micro-arc oxidation workpieces is simple in structure, convenient operation, the effect of using is better than traditional mode.

Drawings

FIG. 1 is a schematic diagram of a composite coating preparation structure of a process for processing a micro-arc oxidized workpiece by combining a vacuum sputtering and an electrophoretic coating technology.

Detailed Description

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and the detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, a process for processing a micro-arc oxidized workpiece by combining a vacuum sputtering technology and an electrophoretic coating technology comprises the following operation steps:

s1: preparation of materials: preparing a certain amount of hexafluorobutyl methacrylate, wherein the hexafluorobutyl methacrylate is a chemical substance and is used for preparing a novel coating with high weather resistance, stain resistance and self-cleaning property;

s2: hexafluorobutyl methacrylate is used as a comonomer, a poly (fluoroalkyl acrylate) resin is synthesized by an emulsion polymerization method, the influence of factors such as the mass ratio of the monomers, the composition and the dosage of an emulsifier, the temperature, the stirring speed and the like on the performances such as the thermal stability, the chemical stability, the hydrophobicity and the like of the fluorine modified acrylic resin emulsion is researched, and the boundary conditions of the preparation process on all parameters of a stable system of the fluorine modified acrylic resin emulsion are optimized;

s3: determining boundary conditions of system parameters of micro-arc induction of the anode surface of the micro-arc oxidation workpiece under a non-alkaline electrolyte system by using the correlation of micro-arc discharge front and rear interelectrode electric field parameters, OH-ion concentration and oxidation time and the micropore structure of the ceramic layer and oxygen ionization strength, establishing a mathematical physical model between micro-arc plasma induction and electrolyte and energy output modes, and providing theoretical basis and test support of the system for the matching of the non-alkaline micro-arc oxidation electrolyte of the micro-arc oxidation workpiece;

s4: the preparation of the micro-arc oxidation/fluorine modified acrylic resin composite coating with embedded combination and external wrapping is carried out by utilizing the adjustability of the anode reaction sequence of OH- ", reaction thickening and oxygen evolution ionization densification and the construction function of current waveform on the blind microporous structure on the surface of the ceramic layer and combining the preparation principle of an electrophoretic organic coating;

s5: depositing magnesium oxide porous film layers with different thicknesses and microporous structures on the surface of the magnesium alloy in advance by adjusting and controlling an electrical parameter output mode, selecting a proper electrolyte system and the like, measuring the structure and the thickness of the film layers by means of scanning electron microscope analysis, testing and quantifying the conductive characteristics of the film layers by electrochemical alternating current impedance, and determining the influence of the electrolyte and the energy output mode on the structure and the electrical properties of the magnesium oxide porous film layers;

s6: parameters such as current, voltage, duty ratio, working mode, dispersion condition and the like are changed, and the matching property of the micro-arc oxidation coating and the fluorine modified acrylic resin electrophoretic coating is improved;

s7: plating the micro-arc oxidation/fluorine modified acrylic resin composite coating on the outer surface of the micro-arc oxidation workpiece by adopting a vacuum sputtering mode and an electrophoretic coating mode, and processing the micro-arc oxidation/fluorine modified acrylic resin composite coating.

In the step S2, the fluorinated alkyl acrylate resin can be obtained by introducing fluorine-containing groups into the acrylate polymer, the fluorine electronegativity is large, the C-F bond is very stable, the fluorine-containing side chain is oriented outwards, shielding protection can be formed on the main chain and the internal covalent bond, the original characteristics of the acrylate resin are maintained through the modified acrylate resin, and the chemical inertness, weather resistance, dirt resistance, oil resistance and water resistance of the polymer coating are improved.

The consumption mechanism of OH-ions in the aqueous solution of the micro-arc oxidation workpiece under the micro-arc oxidation condition is hydroxide generation consumption and oxygen precipitation consumption.

The appearance characteristic of blind micropores uniformly distributed on the surface of the micro-arc oxidation workpiece is beneficial to electrophoretic coating, and the oxidation time can be reduced from 10-15min of single micro-arc oxidation treatment to 3-5 min.

In the step S4, the micro-arc oxidation and electrophoresis processes are combined to prepare the micro-arc electrophoresis composite film of the micro-arc oxidation workpiece, the forming mechanism is researched, and the corrosion resistance can be improved by combining the inorganic oxide ceramic layer with the organic point coating.

The ceramic layer formed by micro-arc oxidation of the micro-arc oxidation workpiece is loose and porous, and cannot meet the requirements of practical application on corrosion resistance, but the ceramic layer better meets the requirements of electrophoretic coating on a matrix.

The electrophoretic coating in step S7 is a new technology generated by combining electrochemistry and polymer chemistry, and is characterized in that the coated object is soaked in the water-soluble coating, connected with an external direct current power supply to be used as an anode, and provided with a cathode corresponding to the anode, direct current is conducted between the two electrodes, and the water-soluble coating is uniformly deposited on the surface of the coated object by means of electrochemical reaction generated by electric energy.

The electrophoretic coating comprises four processes of electrophoresis, electrolysis, electrodeposition and electroosmosis which are carried out simultaneously, and the electrophoresis type is divided into two coating methods of anode electrophoresis and cathode electrophoresis.

The working principle is as follows: preparing a certain amount of hexafluorobutyl methacrylate, wherein hexafluorobutyl methacrylate is a chemical substance and is used for preparing a novel coating with high weather resistance, stain resistance and self-cleaning, hexafluorobutyl methacrylate is used as a comonomer, a poly (fluoroalkyl acrylate) resin is synthesized by adopting an emulsion polymerization method, the influence of factors such as the mass ratio of the monomers, the composition and the dosage of an emulsifier, the temperature, the stirring speed and the like on the thermal stability, the chemical stability, the hydrophobicity and the like of a fluorine modified acrylic resin emulsion is researched, the boundary conditions of various parameters of a stable system of the fluorine modified acrylic resin emulsion by a preparation process are optimized, and the boundary conditions of various parameters of the system for inducing micro-arcs on the surface of an anode of a micro-arc oxidation workpiece under a non-alkaline electrolyte system are determined by the correlation of the parameters of an inter-electrode electric field before and after micro-arc discharge, the concentration of OH-ions, the oxidation time and the micropore structure and the oxygen ionization strength of a ceramic layer, establishing a mathematical physical model between micro-arc plasma induction and electrolyte and energy output modes, providing a theoretical basis and a test support of a system for the selection of non-alkaline micro-arc oxidation electrolyte for micro-arc oxidation workpieces, utilizing the adjustability of an anode reaction sequence of OH- "conversion and reaction thickening and oxygen evolution ionization densification" and a construction function of a current waveform on a blind microporous structure on the surface of a ceramic layer, combining a preparation principle of an electrophoretic organic coating, preparing a micro-arc oxidation/fluorine modified acrylic resin composite coating with embedded and externally wrapped ", depositing magnesium oxide porous film layers with different thicknesses and microporous structures on the surface of a magnesium alloy in advance by regulating an electrical parameter output mode and selecting a proper electrolyte system, measuring the structure and the thickness of the film layers by means of scanning electron microscope analysis, and testing and quantifying the conductive property of the film layers by electrochemical alternating current impedance, the method is characterized by comprising the following steps of determining the influence of an electrolyte and an energy output mode on the structure and the electrical property of a magnesium oxide porous film layer, changing parameters such as current, voltage, duty ratio, a working mode and dispersion conditions of the magnesium oxide porous film layer, improving the matching property of a micro-arc oxidation coating and a fluorine modified acrylic resin electrophoretic coating, and plating the micro-arc oxidation/fluorine modified acrylic resin composite coating on the outer surface of a micro-arc oxidation workpiece by adopting a vacuum sputtering mode and an electrophoretic coating mode to process the micro-arc oxidation/fluorine modified acrylic resin composite coating.

It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.