CN101161862A - Surface treatment solution for magnesium alloy material and technique for processing magnesium alloy material surface - Google Patents
Surface treatment solution for magnesium alloy material and technique for processing magnesium alloy material surface Download PDFInfo
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 57
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- 238000004381 surface treatment Methods 0.000 title claims description 11
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 6
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
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- 150000003839 salts Chemical class 0.000 description 8
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- 239000003973 paint Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
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- 239000004593 Epoxy Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
技术领域technical field
本发明涉及一种表面处理工艺，特别涉及一种镁合金材料的表面处理工艺及用于镁合金材料表面处理工艺的处理溶液。The invention relates to a surface treatment process, in particular to a surface treatment process of a magnesium alloy material and a treatment solution used in the surface treatment process of the magnesium alloy material.
背景技术Background technique
镁合金作为目前工业应用中密度最小的金属结构材料，具有较高的比强度、比刚度以及良好的铸造、减震、切削加工、尺寸稳定性以及优良的电磁屏蔽等性能。由于生产质量、性能的提高和生产成本、价格的下降，镁合金的应用和研究重心已从军工、航空工业等领域扩展到民用(如汽车和电子等)工业领域。近年来镁合金在汽车和电子工业中的应用增长速度高达15％～20％/年。镁合金的应用和开发日益受到世界上各国政府和企业的高度重视，已逐渐发展为继钢铁和铝合金之后的第三大金属材料。As the metal structure material with the lowest density in industrial applications, magnesium alloy has high specific strength, specific stiffness, good casting, shock absorption, cutting, dimensional stability and excellent electromagnetic shielding properties. Due to the improvement of production quality and performance and the decline of production cost and price, the application and research focus of magnesium alloys has expanded from military industry, aviation industry and other fields to civilian (such as automobile and electronics, etc.) industrial fields. In recent years, the application growth rate of magnesium alloy in automobile and electronic industry is as high as 15%-20%/year. The application and development of magnesium alloy has been increasingly valued by governments and enterprises all over the world, and it has gradually developed into the third largest metal material after steel and aluminum alloy.
变形镁合金和压铸镁合金表面组织容易产生腐蚀，常常需要对其表面进行处理，以增加镁合金表面的防护性能。由于金属镁的电化学位约为-2.37v，在普通大气环境中就极易氧化，这层氧化膜疏松、不牢固，不能起到保护基材的作用，并且妨碍了镁合金的表面处理，所以镁合金表面防护处理十分困难，是阻碍镁合金材料推广应用的关键技术难题之一。The surface structure of wrought magnesium alloy and die-cast magnesium alloy is prone to corrosion, and the surface often needs to be treated to increase the protective performance of the magnesium alloy surface. Since the electrochemical potential of metal magnesium is about -2.37v, it is very easy to oxidize in the ordinary atmospheric environment. This layer of oxide film is loose and not firm, which cannot protect the substrate and hinders the surface treatment of the magnesium alloy. The surface protection treatment of magnesium alloy is very difficult, which is one of the key technical problems hindering the popularization and application of magnesium alloy materials.
目前，镁合金表面防护处理方法中主要有涂装处理、铬酸盐转化膜处理、电镀处理、化学镀处理、阳极化处理、表面热喷涂等方法。目前应用较为成熟的是微弧氧化处理，这种方法有成本较高、处理形状复杂零件困难等缺点。而更为普遍使用的镁合金长效防护方法是在镁合金表面进行化学处理后，再用有机涂料层进行保护。另外，上述的镁合金表面化学处理方法中，一般都含有重金属或稀有元素，在防护处理过程中溶液消耗快，成本高，环境污染大。At present, the surface protection treatment methods of magnesium alloys mainly include coating treatment, chromate conversion coating treatment, electroplating treatment, electroless plating treatment, anodizing treatment, surface thermal spraying and other methods. At present, the more mature application is micro-arc oxidation treatment. This method has the disadvantages of high cost and difficulty in processing parts with complex shapes. The more commonly used long-term protection method for magnesium alloys is to carry out chemical treatment on the surface of magnesium alloys, and then protect them with an organic coating layer. In addition, the above-mentioned surface chemical treatment methods for magnesium alloys generally contain heavy metals or rare elements, and the solution is consumed quickly during the protective treatment process, resulting in high cost and serious environmental pollution.
发明内容Contents of the invention
本发明的目的，是提供镁合金材料的一种表面处理工艺。使用本发明所述工艺可以使镁合金表面形成一层细致紧密的彩色薄膜，有一定的装饰效果，既可以对镁合金进行短期防护，又可以提高有机涂料层与镁合金基体的结合力与耐蚀性。The object of the present invention is to provide a surface treatment process for magnesium alloy materials. Using the process described in the present invention can form a fine and compact colored film on the surface of the magnesium alloy, which has a certain decorative effect, can not only provide short-term protection to the magnesium alloy, but also improve the bonding force and durability of the organic coating layer and the magnesium alloy substrate. corrosion.
本发明所述工艺的技术方案是：所述镁合金材料的表面处理工艺，有以下步骤：The technical scheme of the process of the present invention is: the surface treatment process of the magnesium alloy material has the following steps:
按照通常镁合金的表面清洗方法清洁金属表面；迅速转入处理液中浸泡0.5-1.0分钟；50℃-70℃热风干燥，在镁合金材料表面形成保护薄膜。Clean the metal surface according to the usual magnesium alloy surface cleaning method; quickly transfer to the treatment solution and soak for 0.5-1.0 minutes; dry with hot air at 50°C-70°C to form a protective film on the surface of the magnesium alloy material.
所述薄膜的成分主要由MgF2、MgO组成，其物质的量之比约为1∶1，其微观颗粒尺寸在150-300nm。The composition of the thin film is mainly composed of MgF 2 and MgO, the ratio of the amount of the substances is about 1:1, and the microscopic particle size is 150-300nm.
本发明的另一个目的，是提供一种用于本发明所述的工艺的处理溶液，将本发明所述处理溶液用于本发明所述的工艺，可以使镁合金表面形成的彩色膜防护能力处于铬酸盐转化膜与磷酸盐转化膜之间，镁合金表面光洁度好，同时镁合金表面的彩色薄膜，对其外观具有一定的装饰作用。Another object of the present invention is to provide a treatment solution for the process of the present invention, the treatment solution of the present invention is used for the process of the present invention, the color film protective ability formed on the surface of the magnesium alloy can be made Located between the chromate conversion coating and the phosphate conversion coating, the surface finish of the magnesium alloy is good, and the colored film on the surface of the magnesium alloy has a certain decorative effect on its appearance.
本发明所述处理溶液，其一升溶液中各组分质量为：Treatment solution of the present invention, each component quality in its one liter solution is:
柠檬酸：3.0-3.5g；Citric acid: 3.0-3.5g;
氟化氢铵：10.0-12.0g；Ammonium bifluoride: 10.0-12.0g;
硫脲：1.0-2.5g；Thiourea: 1.0-2.5g;
磷酸钠内4.0-6.0g；4.0-6.0g in sodium phosphate;
硝酸锌：2.0-2.5g。Zinc nitrate: 2.0-2.5g.
适用本发明所述工艺的镁合金材料为变形镁合金和压铸镁合金。The magnesium alloy materials suitable for the process described in the present invention are wrought magnesium alloys and die-cast magnesium alloys.
采用本发明所述的工艺和处理溶液，对镁合金表面进行防护，有以下优点：Using the process and treatment solution of the present invention to protect the surface of the magnesium alloy has the following advantages:
1.用本发明所述工艺处理的镁合金，其表面形成一层彩色膜，有一定的装饰效果。由于镁合金表面的彩色膜极薄，细致紧密，因此与基体的附着能力强，同时。1. With the magnesium alloy processed by the process of the present invention, a layer of colored film is formed on its surface, which has a certain decorative effect. Because the color film on the surface of the magnesium alloy is extremely thin, fine and compact, it has strong adhesion to the substrate and at the same time.
2.用本发明所述工艺处理的镁合金，表面形成的彩色膜有防腐作用，参照国家标准GB6458-1986，对经本发明所述的镁合金产品进行耐中性盐雾试验，6小时无白色腐蚀产物出现，室内放置1年无明显变化。因此，经过彩色膜处理的镁合金工件还可以在室内较长时间放置，起到防护和装饰作用。2. With the magnesium alloy of technology process of the present invention, the color film that surface forms has anticorrosion effect, with reference to national standard GB6458-1986, neutral salt spray test is carried out through the magnesium alloy product of the present invention, 6 hours no White corrosion products appear, and there is no obvious change after being placed indoors for 1 year. Therefore, the magnesium alloy workpiece treated with the color film can also be placed indoors for a long time to play a role of protection and decoration.
用本发明所述工艺处理的镁合金，采用国家标准GB9286-1998对表面形成的彩色膜与普通环氧有机涂层附着力进行检测，达到1级；在总厚度为60-80微米的环氧涂料和聚氨酯涂料层覆盖下，参照国家标准GB1771-1991，对经本发明所述的镁合金产品进行耐中性盐雾腐蚀试验1 4 4小时，无鼓泡产生，耐盐雾时间比涂有相同涂层的普通镁合金产品延长24小时以上。With the magnesium alloy processed by the process of the present invention, the national standard GB9286-1998 is used to detect the adhesion of the color film formed on the surface and the ordinary epoxy organic coating, and it reaches
3.通常镁合金产品在涂装时若采用传统的碱洗、酸洗等工艺作为前处理时，难以进行干燥，因为镁合金十分活泼，与水反应，在干燥过程中将迅速氧化形成疏松的氧化物，影响后续涂层的结合力及防护效果。采用本发明所述工艺，由于在镁合金材料的表面形成一层薄膜，使镁合金表面处于钝化状态，使镁合金从水溶液中取出干燥而不被氧化，因此本发明所述工艺可以用于镁合金产品成型后的表面防护处理，既是一种工序间防腐处理方法，又可以提供涂装的过渡层，使后续涂料层附着力强。3. Generally, it is difficult to dry magnesium alloy products if traditional alkali washing, pickling and other processes are used as pretreatment during coating, because magnesium alloys are very active and react with water, and will be rapidly oxidized to form loose particles during the drying process. Oxides affect the bonding force and protective effect of subsequent coatings. By adopting the process of the present invention, since a thin film is formed on the surface of the magnesium alloy material, the surface of the magnesium alloy is in a passivated state, and the magnesium alloy is taken out from the aqueous solution and dried without being oxidized, so the process of the present invention can be used for The surface protection treatment of magnesium alloy products after forming is not only a method of anti-corrosion treatment between processes, but also can provide a transition layer for coating, so that the subsequent coating layer has strong adhesion.
4.由于采用本发明所述工艺，镁合金材料表面形成的薄膜极薄，对基体的侵蚀很少，不影响精密零部件的表面尺寸。4. Due to the adoption of the process described in the present invention, the thin film formed on the surface of the magnesium alloy material has very little erosion on the substrate and does not affect the surface size of precision parts.
5.与铬酸盐转化膜技术相比，没有重金属毒性和污染，与磷酸盐膜技术相比，防腐能力更强，溶液消耗慢，工艺更稳定，成本更低廉，大大降低环境污染。5. Compared with chromate conversion film technology, there is no heavy metal toxicity and pollution. Compared with phosphate film technology, it has stronger anti-corrosion ability, slower solution consumption, more stable process, lower cost, and greatly reduces environmental pollution.
6.本发明所述工艺，镁合金材料表面形成的薄膜具有一定的装饰性能，防腐性能次于铬酸盐膜，有机涂料在彩色膜上的附着力与在磷酸盐膜上接近，可以部分替代铬酸盐膜和磷酸盐膜，作为涂装的前处理过渡层，以及中短期防护、装饰层。6. The process of the present invention, the film formed on the surface of the magnesium alloy material has a certain decorative performance, and the anti-corrosion performance is inferior to that of the chromate film, and the adhesion of the organic coating on the colored film is close to that on the phosphate film, which can be partially replaced Chromate film and phosphate film are used as pre-treatment transition layer for painting, as well as short-term and medium-term protective and decorative layers.
本发明工艺配方和工艺过程简单，处理时间短，溶液消耗少，不需要加热，有利于节约资源和能源。本发明可以用于镁合金材料的机械产品领域，如五金、电子、车辆、军工等领域。The invention has simple technological formula and technological process, short processing time, less solution consumption and no heating, which is beneficial to resource and energy saving. The invention can be used in the field of mechanical products of magnesium alloy materials, such as hardware, electronics, vehicles, military industry and other fields.
附图说明Description of drawings
图1为镁合金表面彩色化膜的扫描电子显微镜照片；Fig. 1 is the scanning electron micrograph of the colored film on the surface of magnesium alloy;
图2为镁合金表面彩色化膜的表面能谱曲线。Fig. 2 is the surface energy spectrum curve of the colored film on the surface of the magnesium alloy.
具体实施方式Detailed ways
实施例1Example 1
按表1配置本发明处理溶液：Configure the treatment solution of the present invention according to Table 1:
表1：处理溶液的成分Table 1: Components of the treatment solution
取牌号为AZ31挤压镁合金，安装下列步骤对挤压镁合金产品进行表面处理：The grade is AZ31 extruded magnesium alloy, and the following steps are carried out for surface treatment of extruded magnesium alloy products:
1.机械除污：用喷砂或砂纸打磨，除去毛刺、氧化物、挤压用添加剂、加工油等异物，水洗；1. Mechanical decontamination: use sandblasting or sandpaper to polish, remove burrs, oxides, extrusion additives, processing oil and other foreign matter, and wash with water;
2.碱洗脱脂：用5g/l氢氧化钠，10g/l磷酸钠，10g/l碳酸钠，2g/l表面活性剂混合溶液洗涤，常温搅动处理1min；水洗；2. Alkaline washing and degreasing: wash with 5g/l sodium hydroxide, 10g/l sodium phosphate, 10g/l sodium carbonate, 2g/l surfactant mixed solution, stir at room temperature for 1min; wash with water;
3.酸洗活化：用11％的氢氟酸浸洗，除去剩余的氧化皮和污物，使表面更清洁有活性；常温处理0.5min，水洗；3. Pickling activation: soak with 11% hydrofluoric acid to remove the remaining scale and dirt, making the surface cleaner and more active; treat at room temperature for 0.5min, and wash with water;
将活化后的镁合金放入纯净水或去离子水中快速清洗后，分别迅速转入表1所述的配方1或2或3的处理溶液浸泡处理1.0分钟，取出经过50℃-70℃的热风吹干，均可使挤压镁合金表面得到本发明所述的彩色膜。Put the activated magnesium alloy into pure water or deionized water for quick cleaning, then quickly transfer to the treatment solution of
将经过上述工艺处理的镁合金工件分别进行以下性能实验：The magnesium alloy workpiece processed by the above process is subjected to the following performance experiments:
1.扫描电镜及表面能谱分析：如图1、图2所示，镁合金经过本发明所述工艺处理后，表面形成了极薄的膜，组成薄膜的微观颗粒很细小，直径约200nm，主要是由Mg、F、O等元素组成，由于薄膜是由单层化合物粒子连接而成，能谱图中包含有镁合金基体的Al元素的峰值出现，并且Mg元素的峰值增强了。1. Scanning electron microscopy and surface energy spectrum analysis: as shown in Figure 1 and Figure 2, after the magnesium alloy is processed by the process of the present invention, an extremely thin film is formed on the surface, and the microscopic particles forming the film are very small, with a diameter of about 200nm. It is mainly composed of Mg, F, O and other elements. Since the film is connected by single-layer compound particles, the peak of Al element containing the magnesium alloy matrix appears in the energy spectrum, and the peak of Mg element is enhanced.
2.中性盐雾试验：参照国家标准GB6458-1986中的方法，将经过本发明所述工艺处理的镁合金产品进行耐中性盐雾试验，条件为3％NaCl，PH＝6.7-7.2，35±1℃，连续喷雾2小时观察一次，样品可以6小时无白色腐蚀产物出现。2. Neutral salt spray test: With reference to the method in the national standard GB6458-1986, the magnesium alloy product processed by the process of the present invention is subjected to a neutral salt spray test, the condition is 3% NaCl, PH=6.7-7.2, 35±1°C, continuous spray for 2 hours and observe once, the sample can be free of white corrosion products for 6 hours.
3.涂装加工：将小批量经过本发明所述工艺处理的镁合金，先喷涂30微米厚度的环氧灰色涂料，间隔5分钟后喷涂黑色丙烯酸-聚氨酯双组分涂料，80℃-100℃烘烤50-60分钟干燥，自然冷却。将同等数量没有经过彩色化处理的清洁镁合金产品进行相同的涂装处理，作为检测的空白对比实验。3. Coating process: Spray the epoxy gray paint with a thickness of 30 microns on a small batch of magnesium alloys processed by the process described in the present invention, and then spray black acrylic-polyurethane two-component paint after an interval of 5 minutes, at 80°C-100°C Bake for 50-60 minutes to dry and cool naturally. The same amount of clean magnesium alloy products that have not undergone colorization treatment are subjected to the same coating treatment as a blank comparison experiment for detection.
4.附着力检测：按照国家标准GB9286-1998，对上述涂层各取6件进行划格法检测试验，作为涂层附着力的参考标准。结果所有经过本发明所述工艺处理的工件涂层划格试验均达到1级，而没有经过本发明所述工艺处理的工件涂层划格实验等级三分之二以上的产品在达不到一级。4. Adhesion test: According to the national standard GB9286-1998, 6 pieces of the above-mentioned coatings were taken for the cross-cut test, which was used as a reference standard for coating adhesion. As a result, all workpiece coating cross-cut tests through the process of the present invention have reached
5.涂层中性盐雾试验：参照国家标准GB/T1771-1991中的方法，将上述涂装产品各取6件进行耐中性盐雾试验，经过本发明所述工艺处理的镁合金产品耐中性盐雾试验，条件为3％NaCl，PH＝6.7-7.2，35±1℃，连续喷雾12小时观察一次，通过多次试验，大部分样品可以144小时无鼓泡产生；而没有经过本发明所述工艺处理的涂装产品全部在120小时以内产生鼓泡现象。5. Coating neutral salt spray test: With reference to the method in the national standard GB/T1771-1991, 6 pieces of the above-mentioned coated products are respectively taken for neutral salt spray test, and the magnesium alloy products processed by the process described in the present invention Neutral salt spray resistance test, the condition is 3% NaCl, PH=6.7-7.2, 35±1°C, continuous spraying for 12 hours to observe once, through many tests, most samples can be 144 hours without bubbling; The coating products processed by the process of the present invention all produce bubbling phenomenon within 120 hours.
取样品为AZ61，AZ91等AZ系列挤压镁合金和压铸镁合金，以及AM系列和ZK系列的铸造镁合金等材料，按照实施例1同样的方法操作，其效果和特点与本实施例基本相同，因此本发明工艺适用于挤压镁合金和压铸镁合金。Samples are AZ series extruded magnesium alloys and die-cast magnesium alloys such as AZ61, AZ91, and cast magnesium alloys of AM series and ZK series, and are operated in the same way as in Example 1. The effects and characteristics are basically the same as those in this example , so the process of the present invention is suitable for extruded magnesium alloys and die-cast magnesium alloys.
结论：in conclusion:
经过本发明所述工艺处理的镁合金，在表面形成鲜艳的彩色薄膜，有一定的装饰效果，且该膜细致紧密，有一定防腐性，具有一定的防护和装饰作用。在涂装与其前处理工序间利用本发明所述工艺处理，可以提供有效的过渡层，使后续涂料层附着力得到保障，并且可以较长时间放置，作为工序间防腐方法。本发明所述工艺没有重金属毒性和污染，溶液消耗极少，工艺稳定，成本低廉。可部分替代铬酸盐膜和磷酸盐膜。The magnesium alloy processed by the process described in the invention forms a bright colored film on the surface, which has a certain decorative effect, and the film is fine and compact, has a certain corrosion resistance, and has a certain protective and decorative effect. Utilizing the process of the present invention between the coating and its pre-treatment process can provide an effective transition layer, so that the adhesion of the subsequent paint layer can be guaranteed, and it can be placed for a long time as an anti-corrosion method between processes. The process of the invention has no heavy metal toxicity and pollution, very little solution consumption, stable process and low cost. Can partially replace chromate film and phosphate film.
虽然本发明已以较佳实施例披露如上，然其并非用以限定本发明，任何所属技术领域的技术人员，在不脱离本发明之精神和范围内，当可作些许之更动与改进，因此本发明之保护范围当视权利要求所界定者为准。Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102009039887A1 (en) | 2009-09-03 | 2011-03-17 | Innovent E.V. | Method for surface-treatment of magnesium-containing component, comprises applying a chemical passivating solution that consists of thixotropic agent, on a part of the surface and leaving the passivating solution on the surface |
| CN102686786A (en) * | 2009-11-23 | 2012-09-19 | 梅特康有限责任公司 | Electrolyte solution and electropolishing methods |
| CN106733546A (en) * | 2016-12-14 | 2017-05-31 | 刘兴旺 | A kind of method of the corrosion-resistant surface treatment of magnadure casting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102009039887A1 (en) | 2009-09-03 | 2011-03-17 | Innovent E.V. | Method for surface-treatment of magnesium-containing component, comprises applying a chemical passivating solution that consists of thixotropic agent, on a part of the surface and leaving the passivating solution on the surface |
| CN102686786A (en) * | 2009-11-23 | 2012-09-19 | 梅特康有限责任公司 | Electrolyte solution and electropolishing methods |
| CN106733546A (en) * | 2016-12-14 | 2017-05-31 | 刘兴旺 | A kind of method of the corrosion-resistant surface treatment of magnadure casting |
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