Safety treatment method for surface of magnesium alloy hub and equipment explosion-proof system

Abstract

The invention discloses a safety treatment method for the surface of a magnesium alloy hub and an equipment explosion-proof system, and relates to the technical field of automobile part production. Comprising the following steps: selecting proper degreasing fluid components and concentration as well as ultrasonic heating temperature and time according to the oil stain condition on the surface of the magnesium alloy hub to ensure that oil stains are thoroughly removed; appropriate pickling solution components and concentration and ultrasonic treatment time are selected, and it is ensured that the surface cleanliness of the magnesium alloy hub meets the requirement. The temperature, humidity or spark intensity and other key parameters in the environment can be monitored and processed in real time through the set core logic algorithm, an early warning mechanism is triggered immediately once any abnormity is detected, potential safety hazards can be found and processed in time, and therefore serious accidents such as explosion and fire disasters are avoided; the algorithm comprehensively considers a plurality of safety conditions, and the environment is considered to be safe only when all the conditions are met at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production, in particular to a method for safely processing the surface of a magnesium alloy wheel hub and an explosion-proof system for the equipment. Background Art

[0002] Magnesium alloy wheels are widely used in the automotive manufacturing field due to their light weight, high strength and good heat dissipation performance. However, magnesium alloys have active chemical properties and are easily oxidized and burned, especially in the presence of friction sparks or high temperature environments generated during the processing process, which can easily cause explosion accidents.

[0003] Traditional safety processing equipment often lacks intelligent monitoring and early warning mechanisms, making it difficult to effectively respond to potential explosion risks. Therefore, this application proposes a magnesium alloy wheel hub surface safety processing method and equipment explosion-proof system to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a method for safely treating the surface of a magnesium alloy wheel hub and an explosion-proof system for the equipment, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for safely treating the surface of a magnesium alloy wheel hub, comprising the following steps:

[0006] According to the oil stains on the surface of the magnesium alloy wheel hub, select the appropriate degreasing liquid composition and concentration, as well as the temperature and time of ultrasonic heating to ensure that the oil stains are completely removed;

[0007] Select appropriate pickling solution composition and concentration, as well as ultrasonic treatment time, to ensure that the surface cleanliness of the magnesium alloy wheel hub meets the requirements;

[0008] Select appropriate neutralizing liquid composition and concentration, as well as ultrasonic heating temperature and time to ensure that the pH value on the surface of the magnesium alloy wheel is moderate;

[0009] According to the material and performance requirements of the magnesium alloy wheel hub, the composition and concentration of the anodizing electrolyte, as well as the temperature, voltage and time of the electrolytic treatment are selected to ensure that a uniform and dense oxide film is formed on the surface of the magnesium alloy wheel hub;

[0010] According to the conductivity requirements of the magnesium alloy wheel hub, the composition and concentration of the conductive treatment liquid, as well as the drying temperature and time are selected to ensure that a conductive film with uniform and excellent conductivity is formed on the oxide film.

[0011] As a specific solution of the technical solution of the present application, the magnesium alloy wheel hub is placed in a degreasing liquid, ultrasonically heated, and the temperature is maintained at 30-50 degrees Celsius, and the degreasing treatment is performed for 1-5 minutes;

[0012] The degreasing liquid includes sodium hydroxide, sodium carbonate and OP-10, wherein the concentration of sodium hydroxide is 5-15 g / L, the concentration of sodium carbonate is 3-8 g / L, and the concentration of OP-10 is 1 ml / L.

[0013] As a specific solution of the technical solution of the present application, the degreased magnesium alloy wheel hub is immersed in a pickling solution and ultrasonicated for 1-2 minutes at room temperature. The pickling solution includes citric acid and lactic acid, wherein the concentration of citric acid is 3-8g / L, and the concentration of lactic acid is 8-12ml / L.

[0014] As a specific solution of the technical solution of the present application, the pickled magnesium alloy wheel hub is immersed in a neutralizing solution, ultrasonically heated to maintain a temperature of 30-50 degrees Celsius, taken out after 1 to 2 minutes, rinsed with deionized water and dried, the pH value of the neutralizing solution is 12-14, and it includes sodium hydroxide, sodium tripolyphosphate, sodium nitrate and sodium pyrophosphate, wherein the concentration of sodium hydroxide is 5-15g / L, the concentration of sodium tripolyphosphate is 15-25g / L, the concentration of sodium nitrate is 0.5-2g / L, and the concentration of sodium pyrophosphate is 5-8g / L.

[0015] As a specific scheme of the technical scheme of the present application, the magnesium alloy wheel hub after neutralization treatment and drying is placed in an anodic oxidation electrolyte, a MAO n-type micro-arc oxidation power supply is used, stainless steel is used as the cathode, and the electrolysis treatment is carried out for 20-30 minutes at a termination voltage of 450-550V under the condition of 5-45°C. The anodic oxidation electrolyte includes potassium hydroxide, sodium aluminate, sodium phosphate, potassium fluoride and adipic acid ammonium additive, wherein the concentration of potassium hydroxide is 5-15g / L, the concentration of sodium aluminate is 3-5g / L, the concentration of sodium phosphate is 5-15g / L, the concentration of potassium fluoride is 10-15g / L, and the concentration of adipic acid ammonium additive is 1-2ml / L.

[0016] As a specific scheme of the technical solution of the present application, the conductive treatment liquid is evenly sprayed onto the surface of the anodized magnesium alloy wheel hub, and then dried at 120°C for 30 minutes. The pH value of the conductive treatment liquid is 6, and it includes phytic acid, sodium tartrate, YG-10 additive and triethylamine, wherein the concentration of phytic acid is 3-8g / L, the concentration of sodium tartrate is 5-10g / L, the concentration of YG-10 additive is 10-20g / L (the mass of YG-10 additive per liter of conductive treatment liquid is 10-20g), and triethylamine is used to adjust the pH value. The YG-10 additive includes aniline, 2,2-bipyridine and cerium oxide, wherein the concentration of aniline is 0.1g / L, the concentration of 2,2-bipyridine is 0.1g / L, the concentration of cerium oxide is 0.01g / L, and the solvent is deionized water.

[0017] An explosion-proof system for safe treatment equipment of a magnesium alloy wheel hub surface, comprising:

[0018] Sensors for real-time monitoring of temperature, humidity and sparks during magnesium alloy wheel processing;

[0019] The data processing module receives the data transmitted by the information collection, and analyzes the data through the core logic algorithm formula to determine whether the current processing environment is in a safe state;

[0020] When the data processing module determines that there are potential safety hazards in the current processing environment, the early warning module is immediately activated and sends out an audible and visual alarm signal;

[0021] After the early warning module sends a signal, the emergency response module automatically starts and takes emergency response measures such as fire extinguishing and shutdown to prevent the occurrence of explosion accidents.

[0022] As a specific solution of the technical solution of this application, the core logic algorithm formula comprehensively considers temperature, humidity and spark intensity, sets a safety threshold, and performs data analysis through the following formula:

[0023]

[0024] Among them, T represents the temperature value monitored in real time, H represents the humidity value monitored in real time, S represents the spark intensity value monitored in real time, T_th represents the temperature safety threshold, H_th represents the humidity safety threshold, and S_th represents the spark intensity safety threshold.

[0025] As a specific solution of the technical solution of the present application, the safety status is a Boolean value, which can only be either true or false. When the temperature and spark intensity are lower than or equal to the safety threshold, and the humidity is higher than or equal to the safety threshold, it indicates that the current processing environment is safe and there is no immediate sign of explosion or other safety risks. On the contrary, if any of the above conditions is not met, the value of the safety status is false.

[0026] A method for safely treating the surface of a magnesium alloy wheel hub and an explosion-proof system for equipment, using the method for safely treating the surface of a magnesium alloy wheel hub and the explosion-proof system for equipment for safely treating the surface of a magnesium alloy wheel hub as described in any of claims 1 to 9.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The safe processing method and explosion-proof system of the magnesium alloy wheel hub surface can monitor key parameters such as temperature, humidity or spark intensity in the processing environment in real time through the set core logic algorithm. Once any abnormality is detected, the early warning mechanism is immediately triggered, which helps to promptly discover and deal with potential safety hazards, thereby avoiding serious accidents such as explosions and fires. Through logical operations, the algorithm comprehensively considers multiple safety conditions. Only when all conditions are met at the same time, the environment is considered safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the surface treatment process of the magnesium alloy wheel hub of the present invention;

[0030] Figure 2 It is a schematic diagram of the process flow of the explosion-proof system of the magnesium alloy wheel hub equipment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0034] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0035] like Figure 1 As shown, the present invention provides a technical solution: a method for safely treating the surface of a magnesium alloy wheel hub, characterized in that it comprises the following steps:

[0036] According to the oil stains on the surface of the magnesium alloy wheel hub, select the appropriate degreasing liquid composition and concentration, as well as the temperature and time of ultrasonic heating to ensure that the oil stains are completely removed;

[0037] Place the magnesium alloy wheel hub in the degreasing liquid, perform ultrasonic heating, maintain the temperature at 30-50 degrees Celsius, and perform degreasing for 1-5 minutes;

[0038] The degreasing liquid includes sodium hydroxide, sodium carbonate and OP-10, wherein the concentration of sodium hydroxide is 5-15 g / L, the concentration of sodium carbonate is 3-8 g / L, and the concentration of OP-10 is 1 ml / L.

[0039] It should be noted that in the embodiment of the present application, the concentration of sodium hydroxide needs to be adjusted according to the severity of the oil stain and the material of the wheel hub surface. Too high a concentration may cause corrosion on the magnesium alloy surface, while too low a concentration may result in poor degreasing effect. The sodium carbonate concentration is between 3-8g / L, which mainly plays a buffering and synergistic desiliconization role. Similarly, the concentration also needs to be adjusted according to the specific situation. OP-10, as a non-ionic surfactant, helps to reduce the surface tension of water and improve the degreasing efficiency. It should also be noted that the magnesium alloy wheel hub after degreasing is immersed in a pickling solution and ultrasonicated at room temperature for 1-2 minutes. The pickling solution includes citric acid and lactic acid, wherein the citric acid concentration is 3-8g / L and the lactic acid concentration is 8-12ml / L. Before degreasing, ensure that there are no scratches or damages on the wheel surface, which will affect the subsequent processing effect and aesthetics. After degreasing, the degreasing liquid remaining on the wheel surface should be cleaned in time to avoid interference with subsequent processes. It should also be noted that the sodium hydroxide in the degreasing liquid is corrosive. Personal protective equipment such as protective gloves and eyes should be worn during operation. Ultrasonic heating equipment should be inspected and maintained regularly to ensure safe use.

[0040] Select appropriate pickling solution composition and concentration, as well as ultrasonic treatment time to ensure that the surface cleanliness of the magnesium alloy wheel hub meets the requirements; select appropriate neutralization solution composition and concentration, as well as ultrasonic heating temperature and time to ensure that the pH value of the magnesium alloy wheel hub surface is moderate; select the anodizing electrolyte composition and concentration, as well as the temperature, voltage and time of the electrolytic treatment according to the material and performance requirements of the magnesium alloy wheel hub to ensure that a uniform and dense oxide film is formed on the surface of the magnesium alloy wheel hub; select the conductive treatment solution composition and concentration, as well as the drying temperature and time according to the conductive performance requirements of the magnesium alloy wheel hub to ensure that a uniform conductive film with excellent conductivity is formed on the oxide film.

[0041] The pickled magnesium alloy wheel hub is immersed in a neutralizing solution and ultrasonically heated to maintain a temperature of 30-50 degrees Celsius. It is taken out after 1 to 2 minutes, rinsed with deionized water and dried. The pH value of the neutralizing solution is 12-14, and it includes sodium hydroxide, sodium tripolyphosphate, sodium nitrate and sodium pyrophosphate, wherein the concentration of sodium hydroxide is 5-15g / L, the concentration of sodium tripolyphosphate is 15-25g / L, the concentration of sodium nitrate is 0.5-2g / L, and the concentration of sodium pyrophosphate is 5-8g / L.

[0042] It should be noted that the preparation of the neutralizing solution should be carried out in a well-ventilated area to avoid the accumulation of harmful gases produced by the evaporation of the solution, and use accurate measurement u to weigh the amount of each chemical to ensure that the pH value and concentration of the neutralizing solution meet the specified requirements. During the ultrasonic heating process, the temperature of the solution should be closely monitored to ensure that it is maintained between 30-50 degrees Celsius to avoid excessive temperature causing damage to the surface of the magnesium alloy wheel hub or decomposition of the chemical components in the solution. It should also be noted that in the embodiment of the present application, the immersion time in the neutralizing solution should be strictly controlled within 1 to 2 minutes to ensure the neutralization effect while avoiding excessive treatment that causes the surface quality of the magnesium alloy wheel hub to deteriorate. In the embodiment of the present application, the magnesium alloy wheel hub is thoroughly rinsed with deionized water to remove all residual neutralizing solution and impurities to prevent adverse effects on subsequent processes. It should also be noted that during drying, the magnesium alloy wheel hub should be heated evenly to avoid deformation or damage caused by local excessive heat.

[0043] It should also be noted that in the embodiments of the present application, the pH value and concentration of the neutralizing solution should be checked regularly. If it is found that it deviates from the specified range, the neutralizing solution should be adjusted or replaced in time. If the pH value of the neutralizing solution is too low, sodium hydroxide or other alkaline substances can be added in an appropriate amount to increase the pH value. If the pH value of the neutralizing solution is too high, an appropriate amount of acidic substances, such as acetic acid, hydrochloric acid, etc., can be added (but it is necessary to pay attention to whether there will be adverse reactions with other components of the neutralizing solution) to lower the pH value. When adjusting the pH value, the adjuster should be added gradually, and the measurement should be added until the pH value reaches the specified range. At the same time, it should also be noted that in the embodiments of the present application, if the concentration of a certain chemical component in the neutralizing solution is too low, the amount of the component to be added can be calculated and supplemented in an appropriate amount. If the concentration is too high, the concentration can be reduced by adding an appropriate amount of deionized water or other diluents. When adjusting the concentration, it is also necessary to add or dilute it gradually, and measure it while adding to ensure that the concentration reaches the specified range.

[0044] The magnesium alloy wheel hub after neutralization treatment and drying is placed in an anodic oxidation electrolyte, a MAO n-type micro-arc oxidation power source is used, stainless steel is used as the cathode, and the electrolysis treatment is carried out for 20-30 minutes at a termination voltage of 450-550V at a temperature of 5-45°C. The anodic oxidation electrolyte includes potassium hydroxide, sodium aluminate, sodium phosphate, potassium fluoride and adipic acid amine additive, wherein the concentration of potassium hydroxide is 5-15g / L, the concentration of sodium aluminate is 3-5g / L, the concentration of sodium phosphate is 5-15g / L, the concentration of potassium fluoride is 10-15g / L, and the concentration of adipic acid amine additive is 1-2ml / L.

[0045] It should be clear that in the embodiment of the present application, potassium hydroxide, as the main alkaline component, helps to form a stable oxide film layer, sodium aluminate can help to form an aluminum-containing composite oxide, improve the hardness and corrosion resistance of the oxide film, sodium phosphate helps to improve the compactness and corrosion resistance of the oxide film, potassium fluoride can inhibit the dissolution of magnesium, promote the formation of the oxide film, and improve the corrosion resistance of the film, and the adipic acid amine additive is used as a corrosion inhibitor or surfactant to improve the stability of the electrolyte and the quality of the oxide film. At the same time, it should also be noted that in the embodiment of the present application, after the anodizing is completed, the magnesium alloy wheel hub should be immediately removed from the electrolyte and thoroughly cleaned with deionized water or distilled water to remove the residual electrolyte and impurities on the surface. After cleaning, it should be dried to avoid moisture residues causing bubbles or shedding of the oxide film. In order to improve the corrosion resistance and stability of the oxide film, a sealing treatment can be performed. The sealing treatment can be carried out by hot water sealing, steam sealing or chemical sealing. After the sealing treatment, the surface quality of the oxide film should be checked to ensure that it has no defects such as cracks, peeling and bubbles.

[0046] The conductive treatment liquid is evenly sprayed onto the surface of the anodized magnesium alloy wheel hub, and then dried at 120°C for 30 minutes. The conductive treatment liquid has a pH value of 6 and includes phytic acid, sodium tartrate, YG-10 additive and triethylamine. The concentration of phytic acid is 3-8g / L, the concentration of sodium tartrate is 5-10g / L, and the concentration of YG-10 additive is 10-20g / L (the mass of YG-10 additive per liter of conductive treatment liquid is 10-20g). Triethylamine is used to adjust the pH value. The YG-10 additive includes aniline, 2,2-bipyridine and cerium oxide. The concentration of aniline is 0.1g / L, the concentration of 2,2-bipyridine is 0.1g / L, and the concentration of cerium oxide is 0.01g / L. The solvent is deionized water.

[0047] It should be clear that in the embodiments of the present application, phytic acid has the ability to chelate metal ions, which helps to form a stable protective film on the surface of the magnesium alloy. Sodium tartrate can be used as a buffer to adjust the pH value of the treatment solution, and it also helps to form a uniform conductive film. The YG-10 additive is a composite additive containing aniline, 2,2-dipyridine and cerium oxide. Aniline is used as a conductive or film-forming aid to enhance the conductive properties and film-forming quality of the treatment solution. 2,2-dipyridine is used as a ligand to form a complex with metal ions, which helps to stabilize the metal ions in the treatment solution. Cerium oxide, as a rare earth oxide, has a catalytic or film-promoting effect. Triethylamine is used to adjust the pH value of the treatment solution to 6. Triethylamine is an alkaline substance. The pH of the treatment solution can be controlled by adjusting its added amount. At the same time, it should also be clear that in the embodiments of the present application, when preparing the conductive treatment liquid, it should be ensured that all components are fully dissolved and mixed evenly to avoid precipitation or stratification. During the spraying process, the spraying pressure and speed should be controlled to ensure that the treatment liquid is evenly covered on the surface of the magnesium alloy wheel hub. During the drying process, the accuracy of the drying temperature and time should be ensured to avoid affecting the quality of the conductive film.

[0048] like Figure 2 As shown, an explosion-proof system for safe treatment of the surface of a magnesium alloy wheel hub comprises:

[0049] A sensor for real-time monitoring of temperature, humidity and sparks during the processing of the magnesium alloy wheel hub; it should be understood that in the embodiment of the present application, the temperature, humidity and spark conditions during the processing of the magnesium alloy wheel hub require the selection of high-precision, high-stability sensors, and regular calibration and maintenance to ensure the accuracy of the data.

[0050] The data processing module receives the data transmitted by the information collection, and performs data analysis through the core logic algorithm formula to determine whether the current processing environment is in a safe state. When the data processing module determines that there are safety hazards in the current processing environment, the early warning module starts immediately and sends out an audible and visual alarm signal. After the early warning module sends out a signal, the emergency processing module automatically starts and takes emergency measures such as fire extinguishing and shutdown to prevent the occurrence of explosion accidents. The core logic algorithm formula comprehensively considers temperature, humidity and spark intensity, sets a safety threshold, and performs data analysis through the following formula:

[0051]

[0052] Among them, T represents the temperature value monitored in real time, H represents the humidity value monitored in real time, S represents the spark intensity value monitored in real time, T_th represents the temperature safety threshold, H_th represents the humidity safety threshold, and S_th represents the spark intensity safety threshold.

[0053] The safety status is a Boolean value that can only be true or false. When the temperature and spark intensity are lower than or equal to the safety threshold, and the humidity is higher than or equal to the safety threshold, it indicates that the current processing environment is safe and there is no immediate sign of explosion or other safety risks. On the contrary, if any of the above conditions is not met, the value of the safety status is false.

[0054] It should be clear that in the embodiment of the present application, the sensor is responsible for real-time monitoring of key parameters such as temperature, humidity and sparks during the processing of the magnesium alloy wheel hub. These data are output in the form of electrical signals and transmitted to the data processing module by wired or wireless means. The data processing module receives the data signal from the sensor through the interface, and the signal conditioning circuit inside the module converts the received electrical signal into a digital signal for subsequent data processing and analysis. As can be seen from the foregoing, the data processing module compares the data collected in real time with the set safety threshold. If the temperature is lower than or equal to the safety threshold, the humidity is higher than or equal to the safety threshold, and the spark intensity is lower than or equal to the safety threshold, the current processing environment is judged to be safe. If any of the above conditions is not met, it is judged that there are safety hazards in the current processing environment. It should also be clear that the data processing module outputs a Boolean value to indicate the safety status of the current processing environment based on the analysis results of the core logic algorithm formula. If the safety status is true, it means that the current processing environment is safe. If the safety status is false, it means that there are safety hazards in the current processing environment. When the data processing module determines that there are safety hazards in the current processing environment, it will immediately trigger the early warning module and send out an audible and visual alarm signal. At the same time, the emergency processing module will also automatically start and take emergency processing measures such as fire extinguishing and shutdown to prevent the occurrence of explosion accidents. It should also be clear that the system also includes a status display module for displaying the safety status to the operator in an intuitive manner.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A method for safely treating the surface of a magnesium alloy wheel hub, characterized in that: The following steps are involved: According to the oil stains on the surface of the magnesium alloy wheel hub, select the appropriate degreasing liquid composition and concentration, as well as the temperature and time of ultrasonic heating to ensure that the oil stains are completely removed; Select appropriate pickling solution composition and concentration, as well as ultrasonic treatment time, to ensure that the surface cleanliness of the magnesium alloy wheel hub meets the requirements; Select appropriate neutralizing liquid composition and concentration, as well as ultrasonic heating temperature and time to ensure that the pH value on the surface of the magnesium alloy wheel is moderate; According to the material and performance requirements of the magnesium alloy wheel hub, the composition and concentration of the anodizing electrolyte, as well as the temperature, voltage and time of the electrolytic treatment are selected to ensure that a uniform and dense oxide film is formed on the surface of the magnesium alloy wheel hub; According to the conductivity requirements of the magnesium alloy wheel hub, the composition and concentration of the conductive treatment liquid, as well as the drying temperature and time are selected to ensure that a conductive film with uniform and excellent conductivity is formed on the oxide film.

2. The method for safely treating the surface of a magnesium alloy wheel hub according to claim 1, characterized in that: The magnesium alloy wheel hub is placed in a degreasing liquid, subjected to ultrasonic heating, and maintained at a temperature of 30-50 degrees Celsius for degreasing treatment for 1-5 minutes; The degreasing liquid includes sodium hydroxide, sodium carbonate and OP-10, wherein the concentration of sodium hydroxide is 5-15 g / L, the concentration of sodium carbonate is 3-8 g / L, and the concentration of OP-10 is 1 ml / L.

3. The method for safely treating the surface of a magnesium alloy wheel hub according to claim 1, characterized in that: The degreased magnesium alloy wheel hub is immersed in a pickling solution and ultrasonicated for 1-2 minutes at room temperature. The pickling solution includes citric acid and lactic acid, wherein the concentration of the citric acid is 3-8 g / L and the concentration of the lactic acid is 8-12 ml / L.

4. The method for safely treating the surface of a magnesium alloy wheel hub according to claim 1, characterized in that: The pickled magnesium alloy wheel hub is immersed in a neutralizing solution, ultrasonically heated to maintain a temperature of 30-50 degrees Celsius, taken out after 1-2 minutes, rinsed with deionized water and dried, the neutralizing solution has a pH value of 12-14, and includes sodium hydroxide, sodium tripolyphosphate, sodium nitrate and sodium pyrophosphate, wherein the concentration of sodium hydroxide is 5-15g / L, the concentration of sodium tripolyphosphate is 15-25g / L, the concentration of sodium nitrate is 0.5-2g / L, and the concentration of sodium pyrophosphate is 5-8g / L.

5. The method for safely treating the surface of a magnesium alloy wheel hub according to claim 1, characterized in that: The magnesium alloy wheel hub after neutralization treatment and drying is placed in an anodic oxidation electrolyte, a MAO n-type micro-arc oxidation power source is used, stainless steel is used as the cathode, and the electrolysis treatment is carried out for 20-30 minutes at a termination voltage of 450-550V at a temperature of 5-45°C. The anodic oxidation electrolyte includes potassium hydroxide, sodium aluminate, sodium phosphate, potassium fluoride and adipic acid amine additive, wherein the concentration of potassium hydroxide is 5-15g / L, the concentration of sodium aluminate is 3-5g / L, the concentration of sodium phosphate is 5-15g / L, the concentration of potassium fluoride is 10-15g / L, and the concentration of adipic acid amine additive is 1-2ml / L.

6. The method for safely treating the surface of a magnesium alloy wheel hub according to claim 1, characterized in that: The conductive treatment liquid is evenly sprayed onto the surface of the anodized magnesium alloy wheel hub, and then dried at 120°C for 30 minutes. The conductive treatment liquid has a pH value of 6 and includes phytic acid, sodium tartrate, YG-10 additive and triethylamine. The concentration of phytic acid is 3-8g / L, the concentration of sodium tartrate is 5-10g / L, and the concentration of YG-10 additive is 10-20g / L (the mass of YG-10 additive per liter of conductive treatment liquid is 10-20g). Triethylamine is used to adjust the pH value. The YG-10 additive includes aniline, 2,2-bipyridine and cerium oxide. The concentration of aniline is 0.1g / L, the concentration of 2,2-bipyridine is 0.1g / L, and the concentration of cerium oxide is 0.01g / L. The solvent is deionized water.

7. An explosion-proof system for safe treatment of magnesium alloy wheel hub surface, characterized in that: Said include: Sensors for real-time monitoring of temperature, humidity and sparks during magnesium alloy wheel processing; The data processing module receives the data transmitted by the information collection, and analyzes the data through the core logic algorithm formula to determine whether the current processing environment is in a safe state; When the data processing module determines that there are potential safety hazards in the current processing environment, the early warning module is immediately activated and sends out an audible and visual alarm signal; After the early warning module sends a signal, the emergency response module automatically starts and takes emergency response measures such as fire extinguishing and shutdown to prevent the occurrence of explosion accidents.

8. The explosion-proof system for safe treatment of the surface of a magnesium alloy wheel hub according to claim 7, characterized in that: The core logic algorithm formula comprehensively considers temperature, humidity and spark intensity, sets a safety threshold, and performs data analysis through the following formula: ; Among them, T represents the temperature value monitored in real time, H represents the humidity value monitored in real time, S represents the spark intensity value monitored in real time, T_th represents the temperature safety threshold, H_th represents the humidity safety threshold, and S_th represents the spark intensity safety threshold.

9. The explosion-proof system for safe treatment of the surface of a magnesium alloy wheel hub according to claim 7, characterized in that: The safety status is a Boolean value, which can only be true or false. When the temperature and spark intensity are lower than or equal to the safety threshold, and the humidity is higher than or equal to the safety threshold, it indicates that the current processing environment is safe and there is no immediate sign of explosion or other safety risks. On the contrary, if any of the above conditions is not met, the value of the safety status is false.

10. A method and equipment explosion-proof system for safely treating the surface of a magnesium alloy wheel hub, characterized in that The safe processing method and explosion-proof system of safe processing equipment described in any of claims 1-9 are used.

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