技术领域technical field
本发明涉及一种镁合金制件表面电泳涂装的方法，属于金属材料表面处理技术。The invention relates to a method for electrophoretic coating on the surface of magnesium alloy parts, which belongs to the surface treatment technology of metal materials.
背景技术Background technique
镁合金具有低密度、高比模、高比强度、高阻尼、电磁屏蔽等优点，而在汽车、电子、航空、国防等领域具有重要的应用价值和广阔的应用前景。但由于镁合金本身易腐蚀，而对镁合金进行化学转化膜、溶胶凝胶技术、电泳涂装等表面处理方法，来避免镁合金在使用过程中遇到的腐蚀问题。Magnesium alloy has the advantages of low density, high specific modulus, high specific strength, high damping, electromagnetic shielding, etc., and has important application value and broad application prospects in the fields of automobiles, electronics, aviation, and national defense. However, since magnesium alloy itself is easy to corrode, surface treatment methods such as chemical conversion coating, sol-gel technology, and electrophoretic coating are applied to magnesium alloy to avoid corrosion problems encountered in the use of magnesium alloy.
有机涂层是最有效的一种防腐蚀涂层。有机涂层的方法较多，如溶胶凝胶技术、喷涂、刷涂、电泳涂装等，其中，溶胶凝胶技术以及喷涂、刷涂技术存在着复杂制件内层、凹陷、焊缝等处难以覆盖上有机涂层的问题，而电泳涂装不仅解决了此难题，且电泳涂料利用率高达90％～95％，而且装饰效果好，膜面光滑、精美，富有金属光泽，在满足了现代社会追求产品本身优异的性能(轻量化、电磁屏蔽等)之外，提高了其附加值(装饰性)。传统电泳涂装目前仅限于在铁板、不锈钢等金属上涂装。近些年，由于3C等产品轻量化发展趋势，电泳涂装被越来越多的应用于镁合金表面上。然而阴极电泳漆的PH值大都在5.5～6.5范围内，电泳涂装时阴极H+增加，易腐蚀阴极涂装时的镁合金，且镁合金多数采用铸造工艺，表面存在孔洞、裂纹等缺陷，给镁合金电泳涂装加上了一道难题。Organic coatings are the most effective type of anti-corrosion coating. There are many methods of organic coating, such as sol-gel technology, spraying, brushing, electrophoretic coating, etc. Among them, sol-gel technology, spraying, and brushing technology have complex inner layers, depressions, welds, etc. It is difficult to cover the problem of organic coating, and electrophoretic coating not only solves this problem, but also the utilization rate of electrophoretic coating is as high as 90% to 95%, and the decorative effect is good, the film surface is smooth, exquisite, and full of metallic luster. In addition to pursuing the excellent performance of the product itself (light weight, electromagnetic shielding, etc.), the society has increased its added value (decorative). Traditional electrophoretic coating is currently limited to coating on iron plates, stainless steel and other metals. In recent years, due to the lightweight development trend of 3C and other products, electrophoretic coating has been more and more applied to the surface of magnesium alloys. However, the pH value of cathodic electrophoretic paint is mostly in the range of 5.5 to 6.5, and the cathode H+ increases during electrophoretic coating, which is easy to corrode the magnesium alloy during cathodic coating, and most magnesium alloys adopt casting technology, and there are holes, cracks and other defects on the surface, giving Magnesium alloy electrophoretic coating adds a difficult problem.
文献(镁合金表面的锌系磷化及阴极电泳，连建设，江苏大学学报Vol.28No.1 Jan.2007)介绍了一种镁合金阴极电泳涂装方法，是先在添加Ce(NO3)3的磷化液中制备一层磷化膜，再在磷化膜上阴极电泳涂装。专利CN200710097634.3则是在镁合金阴极电泳前采用阳极氧化方法进行预处理。众所周知，磷化液和阳极氧化电解液(硫酸、草酸等电解液)是污染较严重的腐蚀液，对人体和环境都有严重危害。而专利CN200610104404.0则是通过不断来回调整频率和占空等参数控制微弧氧化陶瓷层，然后在所述微弧氧化陶瓷层上电泳涂装；以及专利CN200710131372.8是通过真空溅镀被覆、化学镀或电镀等方式对微弧氧化陶瓷层上进行导电前处理，镀上一层镍、银等金属。由于镀覆金属层的方法或贵或污染环境，而不能与电泳涂装效率高等优点相配适。上述两种专利不仅工艺复杂，且量产可能极小。The literature (Zinc-based phosphating and cathodic electrophoresis on the surface of magnesium alloys, Lian Jianshe, Journal of Jiangsu University Vol.28No.1 Jan.2007) introduced a cathodic electrophoretic coating method for magnesium alloys, which is to add Ce(NO3 ) Prepare a layer of phosphating film in the phosphating solution of3 , and then apply cathodic electrophoretic coating on the phosphating film. Patent CN200710097634.3 uses anodic oxidation method for pretreatment before cathode electrophoresis of magnesium alloy. As we all know, phosphating solution and anodizing electrolyte (sulfuric acid, oxalic acid and other electrolytes) are corrosive solutions with serious pollution, which are seriously harmful to human body and environment. The patent CN200610104404.0 is to control the micro-arc oxidation ceramic layer by continuously adjusting parameters such as frequency and duty, and then electrophoretic coating on the micro-arc oxidation ceramic layer; and the patent CN200710131372.8 is coated by vacuum sputtering, Electroless plating or electroplating is used to conduct conductive pretreatment on the micro-arc oxidation ceramic layer, and then plate a layer of nickel, silver and other metals. Because the method of plating the metal layer is either expensive or pollutes the environment, it cannot be matched with the advantages of high efficiency of electrophoretic coating. The above two patents are not only complicated in process, but also the mass production may be extremely small.
发明内容Contents of the invention
本发明的目的是克服镁合金难于涂装，装饰性以及现有前处理技术污染环境、工艺复杂等问题，并且提供一种能在镁合金制件表面获得附着力、耐蚀性好的，能适合工业化生产的阴极电泳有机涂层的镁合金制件表面电泳涂装的方法。The purpose of the present invention is to overcome the problems that magnesium alloys are difficult to paint, decorative, and the existing pretreatment technology pollutes the environment and the process is complicated, and provides a method that can obtain good adhesion and corrosion resistance on the surface of magnesium alloy parts, which can The invention discloses a method for electrophoretic coating on the surface of magnesium alloy parts with cathodic electrophoretic organic coating suitable for industrial production.
本发明所提供的镁合金制件表面涂装方法，包括在特定比例硅酸盐电解液中通过控制微弧氧化工艺，先在镁合金表面形成一层导电性较好，润湿性较好的微弧氧化陶瓷层，然后再通过控制电泳涂装工艺在所述微弧氧化陶瓷层上涂装上阴极电泳漆层。The method for coating the surface of magnesium alloy parts provided by the present invention includes controlling the micro-arc oxidation process in a specific proportion of silicate electrolyte to form a layer of better conductivity and better wettability on the surface of the magnesium alloy. The micro-arc oxidation ceramic layer is then coated with a cathodic electrophoretic paint layer on the micro-arc oxidation ceramic layer through a controlled electrophoretic coating process.
本发明通过微弧氧化前处理工艺取代磷化处理和阳极氧化等工艺，能在镁合金制件表面得到附着力、耐蚀性较好的阴极电泳有机层，且该镁合金产品表面漆膜均匀光滑、外观美丽。The present invention replaces phosphating treatment, anodic oxidation and other processes with the micro-arc oxidation pretreatment process, and can obtain a cathodic electrophoresis organic layer with good adhesion and corrosion resistance on the surface of the magnesium alloy product, and the paint film on the surface of the magnesium alloy product is uniform Smooth and beautiful looking.
以上所述是本发明实现其目的的技术构想。The above is the technical conception of the present invention to realize its purpose.
基于上述技术构想，本发明实现其目的的技术方案是：Based on above-mentioned technical design, the technical scheme that the present invention realizes its purpose is:
一种镁合金制件表面电泳涂装的方法，其工艺步骤依次包括镁合金制件表面预处理和表面电泳涂装处理，其创新点在于：A method for electrophoretic coating on the surface of magnesium alloy parts, the process steps sequentially include surface pretreatment and surface electrophoretic coating treatment of magnesium alloy parts, and its innovative points are:
a、所述镁合金制件表面预处理，是对经清洁处理的镁合金制件作微弧氧化陶瓷层处理，是在电解槽内的硅酸盐处理液中，以被处理镁合金制件为阴极，以不锈钢制件为阳极，在所述阴、阳极之间施加一定的电压，使被处理镁合金制件表面形成微弧氧化陶瓷层；a. The surface pretreatment of the magnesium alloy parts is to do micro-arc oxidation ceramic layer treatment on the cleaned magnesium alloy parts, in the silicate treatment solution in the electrolytic cell, to treat the magnesium alloy parts As the cathode, the stainless steel part is used as the anode, and a certain voltage is applied between the cathode and the anode to form a micro-arc oxidation ceramic layer on the surface of the magnesium alloy part to be treated;
b、所述镁合金制件表面电泳涂装处理，是通过对镁合金制件表面所形成的微弧氧化陶瓷层清洗后，在环氧阴极电泳漆中浸润和搅拌，而在镁合金制件微弧氧化陶瓷层表面形成电泳漆层。b. The electrophoretic coating treatment on the surface of the magnesium alloy parts is to soak and stir in the epoxy cathodic electrophoretic paint after cleaning the micro-arc oxidation ceramic layer formed on the surface of the magnesium alloy parts, while the magnesium alloy parts The electrophoretic paint layer is formed on the surface of the ceramic layer by micro-arc oxidation.
由以上所给出的技术方案可以明了，本发明由于采用表面预处理和表面电泳涂装两步进行，而工艺性能良好，适宜工业化生产，且由于所述预处理是镁合金制件表面微弧氧化处理，且在镁合金制件表面形成陶瓷层，而具有附着力强、耐腐蚀好等优越的性能。这种方法较表面磷化膜处理技术，具有工件不会被腐蚀，环境无污染等优点，而又比CN20061014404.0专利的工艺技术简单易行，制成品质量易于控制，更比CN200710131372.8真空溅镀Ni、Ag等金属方法的生产成本低，生产效率高，环境污染小，从而实现了本发明的目的。It can be understood from the technical scheme given above that the present invention has good technological performance and is suitable for industrialized production due to the two steps of surface pretreatment and surface electrophoretic coating, and because the pretreatment is micro-arcing on the surface of magnesium alloy parts. Oxidation treatment, and a ceramic layer is formed on the surface of magnesium alloy parts, which has excellent properties such as strong adhesion and good corrosion resistance. Compared with the surface phosphating film treatment technology, this method has the advantages that the workpiece will not be corroded and the environment is pollution-free, and it is simpler and easier than the process technology patented in CN20061014404.0, and the quality of the finished product is easy to control. The production cost of vacuum sputtering Ni, Ag and other metal methods is low, the production efficiency is high, and the environmental pollution is small, thereby realizing the purpose of the present invention.
在上述技术方案中，本发明所主张的硅酸盐处理液的配比是，所述微弧氧化硅酸盐处理液的组分及各组分单位体积的重量含量是：Na2SiO31～10g/L，KF 5～30g/L，C3H8O3 10～35ml/L，NaOH 0～8g/L。这是本发明所优选的，但不局限于此。In the above technical solution, the ratio of the silicate treatment solution claimed by the present invention is that the components of the micro-arc oxidation silicate treatment solution and the weight content of each component per unit volume are: Na2 SiO3 1 ～10g/L, KF 5～30g/L, C3 H8 O3 10～35ml/L, NaOH 0～8g/L. This is preferred by the present invention, but not limited thereto.
在上述技术方案中，本发明还主张，所述微弧氧化处理的工艺参数是：电流模式为脉冲直流，电流密度在1～3A/dm2范围内，频率在50～172.45HZ范围内，处理时间在0～10min范围内，所述微弧氧化陶瓷层的厚度在1～15μm范围内。In the above technical solution, the present invention also claims that the process parameters of the micro-arc oxidation treatment are: the current mode is pulsed direct current, the current density is in the range of 1-3A/dm2 , and the frequency is in the range of 50-172.45HZ. The time is in the range of 0-10 min, and the thickness of the micro-arc oxidation ceramic layer is in the range of 1-15 μm.
在上述技术方案中，本发明主张，所述镁合金制件表面微弧氧化陶瓷层的清洗，是超声波清洗；清洗时间在5～10min范围内，在阴极电泳漆中浸润时间在0～30s范围内，被加工件搅拌时间在0～10s范围内。但不局限于此。事实上清洗时间与清洗效果成正比例相关，但过多的清洗时间将会直接影响生产效率。而镁合金制件在阴极电泳漆中的浸润时间的长短和搅拌时间的长短所产生的后果，是与上述清洗处理所产生的后果是相同的。也就是说，所述清洗时间和在阴极电泳漆中浸润、搅拌时间，具有最佳的性价比，而被本发明所优选。In the above technical solution, the present invention claims that the cleaning of the micro-arc oxidation ceramic layer on the surface of the magnesium alloy parts is ultrasonic cleaning; the cleaning time is in the range of 5-10 minutes, and the soaking time in the cathodic electrophoretic paint is in the range of 0-30s The stirring time of the workpiece to be processed is within the range of 0-10s. But not limited to this. In fact, the cleaning time is directly proportional to the cleaning effect, but too much cleaning time will directly affect the production efficiency. The consequences of the soaking time and the length of the stirring time of the magnesium alloy parts in the cathodic electrophoretic paint are the same as the consequences of the above-mentioned cleaning treatment. That is to say, the cleaning time and soaking and stirring time in the cathodic electrophoretic paint have the best cost performance, and are preferred by the present invention.
在上述技术方案中，所述电泳漆层，是由HED环氧阴极电泳漆通过电泳形成；其电泳条件包括：电压在100～200V范围内，PH值在5.5～6.5范围内，电泳处理温度在20～35℃范围内，电泳时间在20～150s范围内，烘干温度在160～180℃范围内，烘干时间在20～30min范围内。其中所述环氧型电泳漆的牌号，并不局限于此。In the above technical solution, the electrophoretic paint layer is formed by electrophoresis of HED epoxy cathodic electrophoretic paint; the electrophoretic conditions include: the voltage is in the range of 100-200V, the pH value is in the range of 5.5-6.5, and the electrophoretic treatment temperature is in the range of In the range of 20-35°C, the electrophoresis time is in the range of 20-150s, the drying temperature is in the range of 160-180°C, and the drying time is in the range of 20-30min. Wherein the grade of the epoxy type electrophoretic paint is not limited thereto.
在上述技术方案中，本发明主张的，所述在镁合金制件表面形成电泳漆层的厚度在5～25μm范围内。这同样是本发明所优选的。In the above technical solution, the present invention claims that the thickness of the electrophoretic paint layer formed on the surface of the magnesium alloy part is in the range of 5-25 μm. This is also preferred in the present invention.
上述技术方案得以实施后，本发明所具有的工艺性能良好，工件表面涂层致密美观，附着力和耐蚀性好，生产成本低，生产效率高和低能耗环保等特点是显而易见的。After the above-mentioned technical solution is implemented, the present invention has good process performance, compact and beautiful workpiece surface coating, good adhesion and corrosion resistance, low production cost, high production efficiency, low energy consumption and environmental protection.
附图说明Description of drawings
图1是本发明工艺流程简示图。Fig. 1 is a schematic diagram of the process flow of the present invention.
具体实施方式Detailed ways
参读附图1，提供以下实施例。Referring to accompanying drawing 1, provide following embodiment.
实施例1、Embodiment 1,
镁合金制件前处理工艺，是将镁合金压铸件采用400号～1200号水砂纸依次打磨，再采用丙酮或酒精清洗3min，然后在25～40℃的特定比例硅酸盐处理液中微弧氧化50s，终止电压100V，频率80.55HZ，基值时间2.99，电流密度1A/dm2。The pretreatment process of magnesium alloy parts is to grind the magnesium alloy die-casting parts sequentially with No. 400 to No. 1200 water sandpaper, and then use acetone or alcohol to clean for 3 minutes, and then micro-arc in a specific proportion of silicate treatment solution at 25-40 ° C. Oxidation for 50s, termination voltage 100V, frequency 80.55HZ, base value time 2.99, current density 1A/dm2 .
所述特定比例硅酸盐处理(电解)液组成为：The specific ratio silicate treatment (electrolyte) solution consists of:
硅酸钠 8g/LSodium silicate 8g/L
氟化钾 10g/LPotassium fluoride 10g/L
甘油(C3H8O3) 18mL/LGlycerin (C3 H8 O3 ) 18mL/L
氢氧化钠 2g/LSodium hydroxide 2g/L
微弧氧化后的镁合金制件用自来水和蒸馏水清洗，在放入超声波清洗器中清洗8min后，转入PH值为5.90的HED-5000大红色环氧阴极电泳漆中浸润3s，搅动5s，电泳电压缓慢调节至100V，调节至100V稳定电压用时5s，电泳135s，烘干时间30min，烘干温度170℃。The magnesium alloy parts after micro-arc oxidation were cleaned with tap water and distilled water. After being cleaned in an ultrasonic cleaner for 8 minutes, they were immersed in HED-5000 red epoxy cathodic electrophoretic paint with a pH value of 5.90 for 3 seconds and stirred for 5 seconds. The electrophoresis voltage was slowly adjusted to 100V, it took 5s to adjust to a stable voltage of 100V, the electrophoresis was 135s, the drying time was 30min, and the drying temperature was 170°C.
微弧氧化陶瓷层厚度：12.414μm 粗糙度为0.214μmMicro-arc oxidation ceramic layer thickness: 12.414μm Roughness is 0.214μm
电泳漆层附着力：0级Adhesion of electrophoretic paint layer: 0 grade
电泳漆层铜乙酸腐蚀时间：958hCopper acetic acid corrosion time of electrophoretic paint layer: 958h
膜层质量：大红色，色泽均匀光滑，内外涂层总厚度为25.7μmFilm quality: bright red, uniform and smooth color, the total thickness of the inner and outer coatings is 25.7μm
实施例2、Embodiment 2,
镁合金制件前处理工艺，是将镁合金压铸件采用水砂纸400号～1200号依次打磨，再采用丙酮或酒精清洗3min，然后在25～40℃的特定比例硅酸盐处理液中微弧氧化60s，终止电压147V，频率172HZ，基值时间2.99，电流密度1.5A/dm2。The pre-treatment process of magnesium alloy parts is to grind the magnesium alloy die-casting parts sequentially with water sandpaper No. 400~1200, and then use acetone or alcohol to clean for 3 minutes, and then micro-arc in a specific proportion of silicate treatment solution at 25~40℃. Oxidation for 60s, end voltage 147V, frequency 172HZ, base value time 2.99, current density 1.5A/dm2 .
所述特定比例硅酸盐处理(电解)液组成为：The specific ratio silicate treatment (electrolyte) solution consists of:
硅酸钠 8g/LSodium silicate 8g/L
氟化钾 15g/LPotassium fluoride 15g/L
甘油(C3H8O3) 12mL/LGlycerin (C3 H8 O3 ) 12mL/L
氢氧化钠 3g/LSodium hydroxide 3g/L
微弧氧化后的镁合金制件用自来水和蒸馏水清洗，在放入超声波清洗器中清洗8min后，转入PH值为5.90的HED-5000天蓝色环氧阴极电泳漆中浸润10s，搅动8s，电泳电压缓慢调节至160V，调节至160V稳定电压用时10s，电泳150s，烘干时间20min，烘干温度180℃。The magnesium alloy parts after micro-arc oxidation were cleaned with tap water and distilled water. After cleaning in an ultrasonic cleaner for 8 minutes, they were immersed in HED-5000 sky blue epoxy cathodic electrophoretic paint with a pH value of 5.90 for 10 seconds and stirred for 8 seconds. The electrophoresis voltage was slowly adjusted to 160V, it took 10s to adjust to a stable voltage of 160V, the electrophoresis was 150s, the drying time was 20min, and the drying temperature was 180°C.
微弧氧化陶瓷层厚度：12.1μm 粗糙度为0.176μmMicro-arc oxidation ceramic layer thickness: 12.1μm Roughness is 0.176μm
电泳漆层附着力：0级Adhesion of electrophoretic paint layer: 0 grade
电泳漆层铜乙酸腐蚀时间：923hCopper acetic acid corrosion time of electrophoretic paint layer: 923h
膜层质量：天蓝色，色泽均匀光滑，内外涂层总厚度为22.7μmFilm quality: sky blue, uniform and smooth color, the total thickness of inner and outer coatings is 22.7μm
实施例3、Embodiment 3,
镁合金制件前处理工艺，是将镁合金压铸件采用400号～1200号水砂纸依次打磨，再采用丙酮或酒精清洗3min，然后在25～40℃的特定比例硅酸盐处理液中微弧氧化80s，终止电压117V，频率50.27HZ，基值时间2.99，电流密度2A/dm2。The pretreatment process of magnesium alloy parts is to grind the magnesium alloy die-casting parts sequentially with No. 400 to No. 1200 water sandpaper, and then use acetone or alcohol to clean for 3 minutes, and then micro-arc in a specific proportion of silicate treatment solution at 25-40 ° C. Oxidation for 80s, end voltage 117V, frequency 50.27HZ, base value time 2.99, current density 2A/dm2 .
所述特定比例硅酸盐处理(电解)液组成为：The specific ratio silicate treatment (electrolyte) solution consists of:
硅酸钠 10g/LSodium silicate 10g/L
氟化钾 15g/LPotassium fluoride 15g/L
甘油(C3H8O3) 18mL/LGlycerin (C3 H8 O3 ) 18mL/L
氢氧化钠 2g/LSodium hydroxide 2g/L
微弧氧化后的镁合金制件用自来水和蒸馏水清洗，在放入超声波清洗器中清洗8min后，转入PH值为5.90的HED-5000紫色环氧阴极电泳漆中浸润15s，搅动10s，电泳电压缓慢调节至160V，调节至160V稳定电压用时12s，电泳90s，烘干时间25min，烘干温度175℃。The magnesium alloy parts after micro-arc oxidation were cleaned with tap water and distilled water. After cleaning in an ultrasonic cleaner for 8 minutes, they were immersed in HED-5000 purple epoxy cathodic electrophoretic paint with a pH value of 5.90 for 15 seconds, stirred for 10 seconds, and electrophoresis. The voltage was slowly adjusted to 160V, and it took 12s to adjust to a stable voltage of 160V, electrophoresis for 90s, drying time for 25min, and drying temperature at 175°C.
微弧氧化陶瓷层厚度：12.46μm 粗糙度为0.224μmMicro-arc oxidation ceramic layer thickness: 12.46μm Roughness is 0.224μm
电泳漆层附着力：0级Adhesion of electrophoretic paint layer: 0 grade
电泳漆层铜乙酸腐蚀时间：996hCopper acetic acid corrosion time of electrophoretic paint layer: 996h
膜层质量：紫色，色泽均匀光滑，内外涂层总厚度为17.74μmFilm quality: purple, uniform and smooth color, the total thickness of the inner and outer coatings is 17.74μm
在上述3个实例中所用环氧阴极电泳漆，并不局限于HED-5000，例如可以是HED-2000或者是HED-6000等等。由于HED-5000环氧阴极电泳漆的性价比高，故本发明予以积极推荐。The epoxy cathodic electrophoretic paint used in the above three examples is not limited to HED-5000, for example, it can be HED-2000 or HED-6000 and so on. Due to the high cost performance of HED-5000 epoxy cathodic electrophoretic paint, the present invention actively recommends it.
由以上3个实施例可见，本发明是十分成功的。Visible by above 3 embodiments, the present invention is very successful.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185992CN101831685A (en) | 2010-05-28 | 2010-05-28 | Electrophoretic coating method for surface of magnesium alloy part |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185992CN101831685A (en) | 2010-05-28 | 2010-05-28 | Electrophoretic coating method for surface of magnesium alloy part |
| Publication Number | Publication Date |
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| CN101831685Atrue CN101831685A (en) | 2010-09-15 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010185992PendingCN101831685A (en) | 2010-05-28 | 2010-05-28 | Electrophoretic coating method for surface of magnesium alloy part |
| Country | Link |
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| CN (1) | CN101831685A (en) |
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| CN102560486A (en)* | 2011-12-08 | 2012-07-11 | 东莞宜安科技股份有限公司 | Surface treatment and coating process of neutral salt spray test on a magnesium alloy surface |
| CN102677127A (en)* | 2012-06-11 | 2012-09-19 | 西北有色金属研究院 | Magnesium alloy microarc oxidation-electrophoresis composite coating and preparation method thereof |
| CN102943298A (en)* | 2012-10-11 | 2013-02-27 | 创金美科技（深圳）有限公司 | Magnesium alloy composite surface treatment method and magnesium alloy watch case |
| TWI782796B (en)* | 2021-11-19 | 2022-11-01 | 薩摩亞商大煜國際有限公司 | High gloss electrophoretic coating process |
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| CN1908246A (en)* | 2006-07-27 | 2007-02-07 | 西安理工大学 | Magnesium alloy differential arc electrophoresis composite surface treating method |
| CN101377000A (en)* | 2007-08-28 | 2009-03-04 | 汉达精密电子(昆山)有限公司 | Electrophoresis coating method for micro-arc oxidation workpiece |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1908246A (en)* | 2006-07-27 | 2007-02-07 | 西安理工大学 | Magnesium alloy differential arc electrophoresis composite surface treating method |
| CN101377000A (en)* | 2007-08-28 | 2009-03-04 | 汉达精密电子(昆山)有限公司 | Electrophoresis coating method for micro-arc oxidation workpiece |
| Title |
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| 《硅酸盐学报》 20050930 王德云等 微弧氧化技术的研究进展 第1133-1138页 1-6 第33卷, 第9期 2* |
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| CN102560486A (en)* | 2011-12-08 | 2012-07-11 | 东莞宜安科技股份有限公司 | Surface treatment and coating process of neutral salt spray test on a magnesium alloy surface |
| CN102677127A (en)* | 2012-06-11 | 2012-09-19 | 西北有色金属研究院 | Magnesium alloy microarc oxidation-electrophoresis composite coating and preparation method thereof |
| CN102677127B (en)* | 2012-06-11 | 2014-08-06 | 西北有色金属研究院 | Magnesium alloy microarc oxidation-electrophoresis composite coating and preparation method thereof |
| CN102943298A (en)* | 2012-10-11 | 2013-02-27 | 创金美科技（深圳）有限公司 | Magnesium alloy composite surface treatment method and magnesium alloy watch case |
| TWI782796B (en)* | 2021-11-19 | 2022-11-01 | 薩摩亞商大煜國際有限公司 | High gloss electrophoretic coating process |
| US12180604B2 (en) | 2021-11-19 | 2024-12-31 | Giant Glory International Limited | Method for coating a substrate |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20100915 |