CN103266313B - A kind of electrogalvanizing environmental protection passivating solution and using method thereof - Google Patents
A kind of electrogalvanizing environmental protection passivating solution and using method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007613 environmental effect Effects 0.000 title claims abstract description 16
- 238000002161 passivation Methods 0.000 claims abstract description 59
- 238000005246 galvanizing Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 41
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000004111 Potassium silicate Substances 0.000 claims description 4
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 4
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000005260 corrosion Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 238000011282 treatment Methods 0.000 abstract description 8
- 239000011701 zinc Substances 0.000 abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 description 9
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- -1 molybdates Chemical class 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 description 1
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000004884 grey matter Anatomy 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229940068041 phytic acid Drugs 0.000 description 1
- 235000002949 phytic acid Nutrition 0.000 description 1
- 239000000467 phytic acid Substances 0.000 description 1
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- 238000002203 pretreatment Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
本发明提供一种电镀锌环保钝化液及其使用方法，属金属材料表面处理技术领域。电镀锌环保钝化液由下列浓度的各组分组成：硅酸盐10～30g/L、H2SO42～5mL/L、TiCl30.5～1.5g/L、H2O25～20mL/L、Mg(NO3)220～50g/L、其余为H2O。用水将已经镀锌的零部件冲洗干净，然后放入出光液中，在室温下浸泡1～15秒，再经水洗后，放入电镀锌环保钝化液中，保持pH为1.5～4，在室温下浸泡5～100秒，再经水清洗干净，最后将零部件表面的水分干燥。该钝化液稳定可靠，为无铬硅酸盐钝化液，主要用于钢铁零件表面电镀锌的后处理工序。经此钝化液处理的锌耐蚀性显著提高，达到铬酸盐钝化效果，具有环保无污染、经济实用、性能优良等优点。The invention provides an electro-galvanizing environment-friendly passivation solution and a using method thereof, which belong to the technical field of metal material surface treatment. The electro-galvanizing environmental protection passivation solution is composed of the following components: silicate 10-30g/L, H 2 SO 4 2-5mL/L, TiCl 3 0.5-1.5g/L, H 2 O 2 5-20mL /L, Mg(NO 3 ) 2 20-50g/L, and the rest is H 2 O. Rinse the galvanized parts with water, then put them into the light-emitting solution, soak them at room temperature for 1-15 seconds, and then wash them with water, then put them into the electro-galvanized environmental protection passivation solution, keep the pH at 1.5-4, Soak at room temperature for 5-100 seconds, then rinse with water, and finally dry the moisture on the surface of the parts. The passivation solution is stable and reliable, and it is a chromium-free silicate passivation solution, which is mainly used in the post-treatment process of electrogalvanizing the surface of steel parts. The corrosion resistance of the zinc treated with this passivation solution is significantly improved, and the effect of chromate passivation is achieved. It has the advantages of environmental protection, no pollution, economical and practical, and excellent performance.
Description
技术领域technical field
本发明涉及一种电镀锌环保钝化液及其使用方法，属金属材料表面处理技术领域。The invention relates to an electro-galvanizing environment-friendly passivation solution and a method for using the same, belonging to the technical field of metal material surface treatment.
背景技术Background technique
电镀锌及锌合金广泛应用于冶金、机械、航空、建筑等许多领域，能有效地提高钢铁耐腐蚀能力。但是，锌及锌合金在湿热的环境中容易被腐蚀，表面形成白斑和灰暗物。为了提高镀锌层的耐蚀性和装饰性，需对其进行钝化处理。传统的铬酸盐钝化工艺简单，原料来源广泛，钝化膜耐蚀性好，因此得到了广泛的应用。但是铬酸盐钝化废液处理困难，而且其含有的Cr6+离子具有较高的毒性，对人体和生态环境有较大危害。据报道，欧洲在2003年就已经开始限制经过六价铬钝化的镀锌产品的进口，已经于2006年7月1日开始实行取消镀层六价铬钝化工艺，随着人们对工艺环保的关注程度逐渐增强，最初的六价铬酸盐蓝白钝化工艺已经逐渐被三价铬蓝白钝化工艺所取代。虽然铬盐的毒性大幅度降低，但三价铬本身存在被氧化并逐渐向六价铬转变的不稳定性，使得钝化液在使用过程依然存在致癌的危险性，因此无铬钝化的研究也成为必然的趋势之一。Electrogalvanizing and zinc alloys are widely used in metallurgy, machinery, aviation, construction and many other fields, which can effectively improve the corrosion resistance of steel. However, zinc and zinc alloys are easily corroded in hot and humid environments, and white spots and gray matter are formed on the surface. In order to improve the corrosion resistance and decorative properties of the galvanized layer, passivation treatment is required. The traditional chromate passivation process is simple, the source of raw materials is wide, and the corrosion resistance of the passivation film is good, so it has been widely used. However, the treatment of chromate passivation waste liquid is difficult, and the Cr 6+ ions contained in it have high toxicity, which is harmful to human body and ecological environment. According to reports, Europe began to restrict the import of galvanized products passivated by hexavalent chromium in 2003, and began to cancel the passivation process of hexavalent chromium on the coating on July 1, 2006. The degree of attention has gradually increased, and the original hexavalent chromate blue-white passivation process has been gradually replaced by the trivalent chromium blue-white passivation process. Although the toxicity of chromium salts is greatly reduced, trivalent chromium itself has the instability of being oxidized and gradually transforming to hexavalent chromium, so that the passivation solution still has the risk of carcinogenicity during use, so the research on chromium-free passivation It has also become one of the inevitable trends.
近年来，不少研究人员提出了硅酸盐、钛盐、钼酸盐、稀土盐、植酸等无铬钝化工艺。这些钝化工艺的钝化膜较薄，而且耐蚀性能不佳又或者存在经济效益低的的问题，因此大多还没用于工业生产。In recent years, many researchers have proposed chromium-free passivation processes such as silicates, titanium salts, molybdates, rare earth salts, and phytic acid. The passivation film of these passivation processes is relatively thin, and the corrosion resistance is not good, or there is a problem of low economic benefit, so most of them have not been used in industrial production.
发明内容Contents of the invention
本发明的目的是针对现有镀锌钝化技术的不足，提供一种无铬且不含重金属及有机物的电镀锌环保钝化液及其使用方法。The purpose of the present invention is to provide a chrome-free, heavy metal and organic-free electro-galvanizing passivation solution and its application method for the deficiencies of the existing galvanizing passivation technology.
本发明通过下列技术方案实现：一种电镀锌环保钝化液，由下列浓度的各组分组成：The present invention is realized through the following technical solutions: an electro-galvanizing environment-friendly passivation solution, which is composed of the following components at the following concentrations:
硅酸盐 10～30g/L、 H2SO4 2～5mL/L、Silicate 10~30g/L, H 2 SO 4 2~5mL/L,
TiCl3 0.5～1.5g/L、 H2O2 5～20mL/L、TiCl 3 0.5～1.5g/L, H 2 O 2 5～20mL/L,
Mg(NO3)2 20～50g/L、 其余为H2O。Mg(NO 3 ) 2 20-50g/L, the rest is H 2 O.
所述电镀锌环保钝化液用浓H2SO4溶液或NaOH溶液将pH值调整为1.5～4。The pH value of the zinc electroplating environment-friendly passivation solution is adjusted to 1.5-4 with concentrated H 2 SO 4 solution or NaOH solution.
所述硅酸盐为硅酸钠或硅酸钾。The silicate is sodium silicate or potassium silicate.
本发明的另一目的在于提供上述电镀锌环保钝化液的使用方法，经过下列各步骤：用水将已经镀锌的零部件冲洗干净，然后放入出光液中，在室温下浸泡1～15秒，再经水洗后，放入电镀锌环保钝化液中，保持pH为1.5～4，在室温下浸泡5～100秒，再经水清洗干净，最后将零部件表面的水分干燥。Another object of the present invention is to provide a method for using the above-mentioned environmental-friendly passivation solution for electro-galvanizing. After the following steps: rinse the galvanized parts with water, then put them into the light-emitting solution, and soak them for 1 to 15 seconds at room temperature , and then washed with water, put it into the electro-galvanizing environmental protection passivation solution, keep the pH at 1.5-4, soak it at room temperature for 5-100 seconds, then wash it with water, and finally dry the water on the surface of the parts.
所述出光液是浓度为1～3％的HNO3水溶液。The light-emitting liquid is a HNO 3 aqueous solution with a concentration of 1-3%.
本发明具备的优点和效果：本发明由于采用硅酸盐作为钝化液的主要成分，并配以H2SO4、TiCl3、H2O2、Mg(NO3)2和H2O，用于电镀锌工艺的后处理工艺，能够显著提高电镀锌的耐蚀性，使盐雾试验出白锈时间可达50～80小时以上，在耐蚀性上达到了铬酸盐钝化的性能水平，而且远高于国家标准（30小时），另外本电镀锌环保钝化液钝化后形成钝化膜为均匀致密的蓝色钝化膜，外观庄重大方，符合市场的需要。在环保方面，由于钝化液中无铬且不含重金属及有机物，克服了铬酸盐钝化技术毒性大、污染严重等缺点，可实现电镀锌零件的环保生产；同时，钝化液的成分均为无机物，成本较低，从而大大降低了生产成本，提高了经济效益，具有很重要的社会意义和应用价值。该钝化液稳定可靠，为无铬硅酸盐钝化液，主要用于钢铁零件表面电镀锌的后处理工序。经此钝化液处理的锌耐蚀性显著提高，达到铬酸盐钝化效果，具有环保无污染、经济实用、性能优良等优点。The advantages and effects of the present invention: the present invention uses silicate as the main component of the passivation solution, and is equipped with H 2 SO 4 , TiCl 3 , H 2 O 2 , Mg(NO 3 ) 2 and H 2 O, The post-treatment process used in the electro-galvanizing process can significantly improve the corrosion resistance of electro-galvanizing, so that the white rust time in the salt spray test can reach more than 50-80 hours, and the corrosion resistance has reached the performance of chromate passivation Level, and far higher than the national standard (30 hours), in addition, the passivation film formed by this electro-galvanizing environmental protection passivation solution is uniform and dense blue passivation film, the appearance is dignified and elegant, which meets the needs of the market. In terms of environmental protection, since the passivation solution contains no chromium and no heavy metals and organic substances, it overcomes the shortcomings of chromate passivation technology such as high toxicity and serious pollution, and can realize the environmentally friendly production of electro-galvanized parts; at the same time, the composition of the passivation solution All are inorganic substances with low cost, thereby greatly reducing production costs and improving economic benefits, and have very important social significance and application value. The passivation solution is stable and reliable, and it is a chromium-free silicate passivation solution, which is mainly used in the post-treatment process of electrogalvanizing the surface of steel parts. The corrosion resistance of the zinc treated with this passivation solution is significantly improved, and the effect of chromate passivation is achieved. It has the advantages of environmental protection, no pollution, economical and practical, and excellent performance.
具体实施方式detailed description
下面结合实施例对本发明的实质作进一步说明。Below in conjunction with embodiment the essence of the present invention will be further described.
实施例1Example 1
电镀锌环保钝化液由下列浓度的各组分组成：Electro-galvanizing environmental protection passivation solution is composed of the following components:
硅酸钠 10g/L、 H2SO4 2mL/L、Sodium silicate 10g/L, H 2 SO 4 2mL/L,
TiCl3 0.5g/L、 H2O2 20mL/L、TiCl 3 0.5g/L, H 2 O 2 20mL/L,
Mg(NO3)2 20g/L、 其余为H2O；Mg(NO 3 ) 2 20g/L, the rest is H 2 O;
pH值为1.5。（用浓H2SO4溶液调整pH值）The pH is 1.5. ( Adjust pH with concentrated H2SO4 solution)
将该钝化液用于对螺丝、螺帽进行硅酸盐钝化处理。螺丝、螺帽在进行电镀之前进行打磨除锈、除油、活化等前处理后，放入电镀液中进行电镀，镀锌工艺的镀液组成及操作条件为：ZnCl2 80g/L、NaCl200g/L、硼酸30g/L，镀锌添加剂适量、镀液的pH值保持在4.5，电流密度为1.5A/dm2，温度为室温，电镀时间为20分钟。The passivation solution is used for silicate passivation treatment on screws and nuts. Screws and nuts are subjected to pre-treatments such as grinding, derusting, degreasing, and activation before electroplating, and then put into electroplating baths for electroplating. The bath composition and operating conditions of the galvanizing process are: ZnCl 2 80g/L, NaCl 200g/ L. Boric acid 30g/L, appropriate amount of galvanizing additives, the pH value of the plating solution is maintained at 4.5, the current density is 1.5A/dm 2 , the temperature is room temperature, and the electroplating time is 20 minutes.
用水将已经镀锌的螺丝、螺帽冲洗干净，然后放入浓度为1％的HNO3水溶液中，在室温下浸泡3秒，再经水洗后，放入电镀锌环保钝化液中，保持pH为1.5，在室温下浸泡15秒，再经水清洗干净，最后用吹风机将螺丝、螺帽表面的水分干燥。Rinse the galvanized screws and nuts with water, then put them into 1% HNO 3 aqueous solution, soak them for 3 seconds at room temperature, and then wash them with water, then put them into the galvanized environment-friendly passivation solution to keep the pH 1.5, soak at room temperature for 15 seconds, then rinse with water, and finally use a hair dryer to dry the moisture on the surface of the screws and nuts.
使用本钝化液进行处理后的锌镀层外观为均匀淡蓝色钝化膜，经中性盐雾试验出白锈时间超过60小时。The appearance of the zinc coating treated with this passivation solution is a uniform light blue passivation film, and the white rust time is more than 60 hours after the neutral salt spray test.
实施例2Example 2
电镀锌环保钝化液由下列浓度的各组分组成：Electro-galvanizing environmental protection passivation solution is composed of the following components:
硅酸钾 15g/L、 H2SO4 3mL/L、Potassium silicate 15g/L, H 2 SO 4 3mL/L,
TiCl3 1g/L、 H2O2 15mL/L、TiCl 3 1g/L, H 2 O 2 15mL/L,
Mg(NO3)2 35g/L、 其余为H2O；Mg(NO 3 ) 2 35g/L, the rest is H 2 O;
pH值为2。（用NaOH溶液调整pH值）The pH value is 2. (Adjust pH with NaOH solution)
将该钝化液用于对与某汽车发动机的油缸电镀Zn后的硅酸盐钝化处理。钢管经前处理（除锈、除油、活化）后实施电镀，锌铁合金电镀工艺的镀液组成及操作条件为：NaOH100g/L、ZnCl210g/L、添加剂适量、pH值12.5、阴极电流密度1.7A/dm2、温度为室温，电镀时间为60分钟。The passivation solution is used for silicate passivation treatment after electroplating Zn with an oil cylinder of an automobile engine. The steel pipe is electroplated after pretreatment (rust removal, degreasing, activation). The composition and operating conditions of the zinc-iron alloy electroplating process are: NaOH 100g/L, ZnCl 2 10g/L, appropriate amount of additives, pH value 12.5, cathode current density 1.7A/dm 2 , the temperature is room temperature, and the electroplating time is 60 minutes.
用水将已经镀锌的钢管冲洗干净，然后放入浓度为2％的HNO3水溶液中，在室温下浸泡1秒，再经水洗后，放入电镀锌环保钝化液中，保持pH为2，在室温下浸泡100秒，再经水清洗干净，最后用干燥箱将钢管表面的水分干燥。Rinse the galvanized steel pipe with water, then put it into a 2% HNO3 aqueous solution, soak it at room temperature for 1 second, then wash it with water, put it into an electro-galvanized environmental protection passivation solution, and keep the pH at 2. Soak at room temperature for 100 seconds, then rinse with water, and finally use a drying oven to dry the water on the surface of the steel pipe.
使用本钝化液进行处理后的Zn镀层，外观均匀光亮，经中性盐雾试验出白锈时间超过80小时，大大超过了现有铬酸盐钝化工艺的耐蚀性能（25小时）。The Zn coating treated with this passivation solution has a uniform and bright appearance, and the white rust time of the neutral salt spray test exceeds 80 hours, which greatly exceeds the corrosion resistance of the existing chromate passivation process (25 hours).
实施例3Example 3
电镀锌环保钝化液由下列浓度的各组分组成：Electro-galvanizing environmental protection passivation solution is composed of the following components:
硅酸钾 30g/L、 H2SO4 5mL/L、Potassium silicate 30g/L, H 2 SO 4 5mL/L,
TiCl3 1.5g/L、 H2O2 5mL/L、TiCl 3 1.5g/L, H 2 O 2 5mL/L,
Mg(NO3)2 50g/L、 其余为H2O；Mg(NO 3 ) 2 50g/L, the rest is H 2 O;
pH值为4。（用浓H2SO4溶液调整pH值）The pH value is 4. ( Adjust pH with concentrated H2SO4 solution)
将该钝化液用于对大型钢板进行整体镀锌后的钝化处理。大型钢板经前处理（除锈、除油、活化）后实施电镀，镀锌工艺的镀液组成及操作条件为：ZnCl270g/L、KCl190g/L、添加剂适量、pH值5.5、阴极电流密度1.8A/dm2、温度为室温，电镀时间为50分钟。The passivation solution is used for passivation treatment after the overall galvanizing of large steel plates. Large-scale steel plates are electroplated after pretreatment (rust removal, degreasing, activation). The bath composition and operating conditions of the galvanizing process are: ZnCl 2 70g/L, KCl 190g/L, appropriate amount of additives, pH value 5.5, cathode current density 1.8A/dm 2 , the temperature is room temperature, and the electroplating time is 50 minutes.
用水将已经镀锌的钢板冲洗干净，然后放入浓度为3％的HNO3水溶液中，在室温下浸泡15秒，再经水洗后，放入电镀锌环保钝化液中，保持pH为4，在室温下浸泡5秒，再经水清洗干净，最后用烘道将钢板表面的水分干燥。Rinse the galvanized steel plate with water, then put it into a 3% HNO3 aqueous solution, soak it for 15 seconds at room temperature, and then put it into an electro-galvanized environmental protection passivation solution to keep the pH at 4. Soak for 5 seconds at room temperature, then rinse with water, and finally use an oven to dry the moisture on the surface of the steel plate.
使用本钝化液进行处理后的镀锌钢板外观均匀光亮，经中性盐雾试验出白锈时间超过70小时。The appearance of the galvanized steel plate treated with this passivation solution is uniform and bright, and the white rust time exceeds 70 hours through the neutral salt spray test.
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| CN107574430A (en) * | 2017-07-26 | 2018-01-12 | 昆明理工大学 | A kind of silicate bright blue passivation liquid and preparation method thereof |
| CN107326357A (en) * | 2017-08-02 | 2017-11-07 | 合肥市田源精铸有限公司 | A kind of passivation process of galvanized steel plain sheet |
| CN108546941B (en) * | 2018-06-11 | 2020-04-07 | 昆明理工大学 | Environment-friendly titanium salt color passivation solution |
| CN108531900A (en) * | 2018-06-13 | 2018-09-14 | 昆明理工大学 | A kind of composite coloured passivating solution of environment-friendly type and preparation method thereof |
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Denomination of invention: An environmentally friendly passivation solution for electroplating zinc and its usage method Granted publication date: 20160824 Pledgee: Panlong District Rural Credit Cooperative Union in Kunming City Pledgor: Kunming lvlang Environmental Protection Technology Co.,Ltd. Registration number: Y2024980024043 |