CN103225087A - Stainless steel pickling passivation paste and preparation method thereof - Google Patents
Stainless steel pickling passivation paste and preparation method thereof Download PDFInfo
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- CN103225087A CN103225087A CN2013101485185A CN201310148518A CN103225087A CN 103225087 A CN103225087 A CN 103225087A CN 2013101485185 A CN2013101485185 A CN 2013101485185A CN 201310148518 A CN201310148518 A CN 201310148518A CN 103225087 A CN103225087 A CN 103225087A
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- 238000002161 passivation Methods 0.000 title claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 30
- 239000010935 stainless steel Substances 0.000 title claims abstract description 30
- 238000005554 pickling Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 239000003349 gelling agent Substances 0.000 claims abstract description 9
- 230000035515 penetration Effects 0.000 claims abstract 2
- -1 magnesium fluorosilicate Chemical group 0.000 claims description 10
- 239000003518 caustics Substances 0.000 claims description 9
- 239000011256 inorganic filler Substances 0.000 claims description 9
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 9
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 8
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 8
- 229920002873 Polyethylenimine Polymers 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical group ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 4
- 125000005233 alkylalcohol group Chemical group 0.000 claims description 4
- 150000002191 fatty alcohols Chemical class 0.000 claims description 4
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims 1
- 235000013162 Cocos nucifera Nutrition 0.000 claims 1
- 244000060011 Cocos nucifera Species 0.000 claims 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims 1
- 239000005642 Oleic acid Substances 0.000 claims 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 239000003431 cross linking reagent Substances 0.000 description 4
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000019864 coconut oil Nutrition 0.000 description 3
- 239000003240 coconut oil Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000012856 weighed raw material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000316887 Saissetia oleae Species 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229940023462 paste product Drugs 0.000 description 1
- 238000001303 quality assessment method Methods 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/025—Cleaning or pickling metallic material with solutions or molten salts with acid solutions acidic pickling pastes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cosmetics (AREA)
- ing And Chemical Polishing (AREA)
Abstract
Description
技术领域 technical field
本发明涉及酸洗钝化技术领域，具体涉及一种不锈钢酸洗钝化膏及其制备方法。 The invention relates to the technical field of pickling passivation, in particular to a stainless steel pickling passivation paste and a preparation method thereof.
背景技术 Background technique
不锈钢在加工过程中会造成表面缺陷、腐蚀隐患，出现黑色氧化皮和其它金属化合物、黄色焊缝及冷拔时的油脂等，为了提高不锈钢的外观和耐蚀性，加工后的不锈钢必须进行酸洗钝化处理。目前生产不锈钢酸洗钝化膏的主要原料为氢氟酸和硝酸(如专利CN 86101522)，这类产品在使用过程中会释放出氟化氢，容易烧伤人体皮肤和视网膜，不利于施工人员的身体健康，特别是在相对封闭的施工环境中（如反应釜、精馏塔等）对施工人员的危害极大。 During the processing of stainless steel, it will cause surface defects, hidden dangers of corrosion, black scale and other metal compounds, yellow welds and grease during cold drawing, etc. In order to improve the appearance and corrosion resistance of stainless steel, the processed stainless steel must be acidified. Wash passivation treatment. At present, the main raw materials for the production of stainless steel pickling passivation paste are hydrofluoric acid and nitric acid (such as patent CN 86101522). These products will release hydrogen fluoride during use, which is easy to burn human skin and retina, which is not conducive to the health of construction workers. , especially in a relatively closed construction environment (such as reactors, distillation towers, etc.) is extremely harmful to construction personnel.
发明内容 Contents of the invention
本发明解决的技术问题是提供了一种安全环保且高效稳定的不锈钢酸洗钝化膏及其制备方法，该酸洗钝化膏在操作过程中无氟化氢的释放，减少了对人体的危害，解决了不锈钢酸洗钝化过程中长期存在的氟化氢污染问题，并且该酸洗钝化膏的原料均为水溶性物质，清理简便快捷且无二次污染问题。 The technical problem solved by the present invention is to provide a safe, environmentally friendly, highly efficient and stable stainless steel pickling passivation paste and its preparation method. The pickling passivation paste does not release hydrogen fluoride during operation, which reduces the harm to the human body. The long-standing hydrogen fluoride pollution problem in the stainless steel pickling passivation process is solved, and the raw materials of the pickling passivation paste are all water-soluble substances, and the cleaning is simple and quick without secondary pollution problems.
本发明的技术方案是：一种不锈钢酸洗钝化膏，其特征在于主要由以下重量份的组分组成：腐蚀剂10-30份、钝化剂20-60份、凝胶剂10-30份、无机填料40-60份和渗透剂1-5份。 The technical solution of the present invention is: a stainless steel pickling passivation paste, which is characterized in that it mainly consists of the following components in parts by weight: 10-30 parts of corrosive agent, 20-60 parts of passivating agent, and 10-30 parts of gelling agent , 40-60 parts of inorganic filler and 1-5 parts of penetrating agent.
本发明所述的不锈钢酸洗钝化膏主要由以下重量份的组分组成：腐蚀剂10份、钝化剂30份、凝胶剂20份、无机填料35份和渗透剂3份。 The stainless steel pickling passivation paste of the present invention mainly consists of the following components in parts by weight: 10 parts of corrosive agent, 30 parts of passivating agent, 20 parts of gelling agent, 35 parts of inorganic filler and 3 parts of penetrating agent.
本发明所述的腐蚀剂为氟硅酸，所述的凝胶剂为聚乙烯亚胺，所述的无机填料为氟硅酸镁，所述的渗透剂为非离子表面活性剂，具体为脂肪醇聚氧乙烯醚、烷基醇聚氧乙烯醚或椰子油脂肪酸二乙醇酰胺中的一种或多种。 The corrosive agent of the present invention is fluosilicic acid, the gelling agent is polyethyleneimine, the inorganic filler is magnesium fluosilicate, and the penetrating agent is a nonionic surfactant, specifically fatty alcohol One or more of polyoxyethylene ether, alkyl alcohol polyoxyethylene ether or coconut oil fatty acid diethanolamide.
本发明所述的不锈钢酸洗钝化膏的制备方法，其特征在于主要包括以下步骤：按照以下配比称取原料：腐蚀剂10-30份、钝化剂20-60份、凝胶剂10-30份、无机填料40-60份和渗透剂1-5份，将称取的原料加入到聚四氟乙烯反应釜中，搅拌溶解后加入交联剂，其中交联剂的加入量为凝胶剂重量的10%-20%，然后继续搅拌静止即制得果冻状不锈钢酸洗钝化膏。 The preparation method of the stainless steel pickling passivation paste according to the present invention is characterized in that it mainly includes the following steps: weighing raw materials according to the following proportions: 10-30 parts of corrosive agent, 20-60 parts of passivating agent, 10-60 parts of gelling agent 30 parts, 40-60 parts of inorganic filler and 1-5 parts of penetrating agent, add the weighed raw materials into the polytetrafluoroethylene reaction kettle, stir and dissolve and then add the cross-linking agent, wherein the amount of the cross-linking agent added is gel 10%-20% of the weight of the agent, and then continue to stir to make a jelly-like stainless steel pickling passivation paste.
本发明所述的交联剂为环氧氯丙烷。 The crosslinking agent described in the present invention is epichlorohydrin.
本发明的不锈钢酸洗钝化膏在使用过程中不释放氢氟酸，对环境危害小，不伤皮肤，保证了施工人员的健康且有效地清除了不锈钢表面的各种焊缝、氧化皮和锈迹，是一种绿色环保高效的产品。 The stainless steel pickling passivation paste of the present invention does not release hydrofluoric acid during use, has little harm to the environment, does not hurt the skin, ensures the health of construction workers and effectively removes various welds, oxide scales and Rust is a green and efficient product.
具体实施方式 Detailed ways
实施例 Example
按照下述配比称取原料（千克）： Weigh raw materials (kg) according to the following ratio:
1、氟硅酸10、硝酸60、聚乙烯亚胺30、氟硅酸镁40、脂肪醇聚氧乙烯醚 1； 1. Fluorosilicic acid 10, nitric acid 60, polyethyleneimine 30, magnesium fluorosilicate 40, fatty alcohol polyoxyethylene ether 1;
2、氟硅酸10、硝酸30、聚乙烯亚胺20、氟硅酸镁35、烷基醇聚氧乙烯醚 3； 2. Fluorosilicic acid 10, nitric acid 30, polyethyleneimine 20, magnesium fluorosilicate 35, alkyl alcohol polyoxyethylene ether 3;
3、氟硅酸30、硝酸20、聚乙烯亚胺10、氟硅酸镁60、椰子油脂肪酸二乙醇酰胺 5。 3. Fluorosilicic acid 30, nitric acid 20, polyethyleneimine 10, magnesium fluorosilicate 60, coconut oil fatty acid diethanolamide 5.
生产方法如下： The production method is as follows:
将称取的原料加入到聚四氟乙烯反应釜中，搅拌溶解后加入交联剂环氧氯丙烷，其中环氧氯丙烷的添加量为聚乙烯亚胺重量的10%-20%，继续搅拌20min后，灌入到1公斤的小包装瓶中，静置1小时后即成果冻状，至此不锈钢酸洗钝化膏制备完成。 Add the weighed raw materials into the polytetrafluoroethylene reactor, stir and dissolve, then add the crosslinking agent epichlorohydrin, wherein the amount of epichlorohydrin added is 10%-20% of the weight of polyethyleneimine, and continue to stir After 20 minutes, it was poured into a 1 kg small packaging bottle, and after standing for 1 hour, it became jelly-like. So far, the preparation of stainless steel pickling passivation paste is completed.
氟硅酸作为腐蚀剂，在使用过程中不释放氟化氢，避免了对施工人员造成危害，且能够有效地解决产品放置过程中失效的问题。氟硅酸镁作为无机填料，在夏季需要增加氟硅酸镁的质量，以增加产品的粘度，在冬季需要减少氟硅酸镁的质量，以减少产品的粘度。渗透剂为非离子表面活性剂如脂肪醇聚氧乙烯醚、烷基醇聚氧乙烯醚或椰子油脂肪酸二乙醇酰胺中的一种或多种，加入渗透剂是为了降低膏状产品与工件间的表面张力，以增加反应速度。 As a corrosive agent, fluosilicic acid does not release hydrogen fluoride during use, avoiding harm to construction personnel, and can effectively solve the problem of failure during product placement. As an inorganic filler, magnesium fluorosilicate needs to increase the quality of magnesium fluorosilicate in summer to increase the viscosity of the product, and needs to reduce the quality of magnesium fluorosilicate in winter to reduce the viscosity of the product. The penetrating agent is one or more of non-ionic surfactants such as fatty alcohol polyoxyethylene ether, alkyl alcohol polyoxyethylene ether or coconut oil fatty acid diethanolamide. The purpose of adding penetrating agent is to reduce the gap between the paste product and the workpiece. surface tension to increase the reaction rate.
使用方法： Instructions:
1、先将不锈钢表面油污处理干净； 1. Clean the oil stain on the stainless steel surface first;
2、用刷子蘸取本产品涂抹于待清洗部位的表面，使产品厚度为2毫米以上，保持15-30min即可； 2. Dip this product with a brush and apply it on the surface of the part to be cleaned, so that the thickness of the product is more than 2 mm, and keep it for 15-30 minutes;
3、用碳酸钠或者氢氧化钙稀溶液清洗工件表面； 3. Clean the workpiece surface with sodium carbonate or calcium hydroxide dilute solution;
4、最后用清水冲洗工件，至清洗液的pH值接近中性为止。 4. Finally, rinse the workpiece with clean water until the pH value of the cleaning solution is close to neutral.
质量评定与检验： Quality assessment and inspection:
1、酸洗钝化后表面应呈均匀的银白色，没有明显的腐蚀痕迹，焊缝区域氧化皮去除彻底，无颜色不均匀的斑痕。 1. After pickling and passivation, the surface should be uniform silvery white, without obvious corrosion traces, and the oxide skin in the weld area should be completely removed, without uneven color spots.
2、用3毫升硝酸+1克铁氰化钾+50毫升清水调配成溶液，然后用清水稀释到100毫升，配置成检验试剂，将浸过试剂的滤纸贴附在工件上，30秒内不出现蓝点。 2. Use 3ml of nitric acid + 1g of potassium ferricyanide + 50ml of water to make a solution, then dilute it to 100ml with water, and configure it as a test reagent. Attach the filter paper soaked in the reagent to the workpiece. A blue dot appears.
3、将8克硫酸铜溶于500毫升蒸馏水中，加入2-3毫升硫酸，然后将配置的溶液滴于钝化工件表面，保持湿润，在6分钟内无铜析出。 3. Dissolve 8 grams of copper sulfate in 500 milliliters of distilled water, add 2-3 milliliters of sulfuric acid, and then drop the prepared solution on the surface of the passivated workpiece, keep it moist, and no copper will be precipitated within 6 minutes.
Claims (8)
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Cited By (10)
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| CN103820774A (en) * | 2014-02-26 | 2014-05-28 | 苏州禾川化学技术服务有限公司 | Stainless steel pickling passivation cream with high transparency and high viscosity and preparation method thereof |
| CN104911576A (en) * | 2015-07-02 | 2015-09-16 | 常熟风范电力设备股份有限公司 | Chrome-free passivant for hot-dip galvanized steel sheet and preparation method thereof |
| CN104962910A (en) * | 2015-06-26 | 2015-10-07 | 合肥长兴汽车配件有限公司 | Rust-proof treatment method for stainless-steel welding joint |
| CN106917095A (en) * | 2017-03-23 | 2017-07-04 | 合肥协耀玻璃制品有限公司 | A kind of acid-washing stainless steel passivation cream and preparation method thereof |
| CN106939420A (en) * | 2017-03-23 | 2017-07-11 | 合肥协耀玻璃制品有限公司 | A kind of passivation for stainless steel liquid and its passivation technology |
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| CN107268000A (en) * | 2017-07-10 | 2017-10-20 | 南京中车浦镇城轨车辆有限责任公司 | A kind of acid-washing stainless steel passivation cream and preparation method thereof and application method |
| CN107268002A (en) * | 2017-08-04 | 2017-10-20 | 苏州吉利不锈钢制品有限公司 | A kind of 304 passivating agent for acid-washing stainless steel and preparation method thereof |
| CN107488858A (en) * | 2017-08-04 | 2017-12-19 | 苏州吉利不锈钢制品有限公司 | A kind of austenitic stainless steel passivating agent for acid-washing and preparation method thereof |
| CN105018948B (en) * | 2015-07-22 | 2018-07-24 | 中冶南方工程技术有限公司 | A kind of 304 austenitic stainless steel acid washing method of hot rolling |
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| CN112553634A (en) * | 2020-10-30 | 2021-03-26 | 哈尔滨哈飞航空工业有限责任公司 | Ointment and passivation paste for stainless steel brush coating passivation and preparation method thereof |
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| CN103820774A (en) * | 2014-02-26 | 2014-05-28 | 苏州禾川化学技术服务有限公司 | Stainless steel pickling passivation cream with high transparency and high viscosity and preparation method thereof |
| CN104962910A (en) * | 2015-06-26 | 2015-10-07 | 合肥长兴汽车配件有限公司 | Rust-proof treatment method for stainless-steel welding joint |
| CN104911576A (en) * | 2015-07-02 | 2015-09-16 | 常熟风范电力设备股份有限公司 | Chrome-free passivant for hot-dip galvanized steel sheet and preparation method thereof |
| CN105018948B (en) * | 2015-07-22 | 2018-07-24 | 中冶南方工程技术有限公司 | A kind of 304 austenitic stainless steel acid washing method of hot rolling |
| CN106917095A (en) * | 2017-03-23 | 2017-07-04 | 合肥协耀玻璃制品有限公司 | A kind of acid-washing stainless steel passivation cream and preparation method thereof |
| CN106939420A (en) * | 2017-03-23 | 2017-07-11 | 合肥协耀玻璃制品有限公司 | A kind of passivation for stainless steel liquid and its passivation technology |
| CN107012472A (en) * | 2017-03-23 | 2017-08-04 | 合肥协耀玻璃制品有限公司 | A kind of passivating agent for acid-washing stainless steel and preparation method thereof |
| CN107268000A (en) * | 2017-07-10 | 2017-10-20 | 南京中车浦镇城轨车辆有限责任公司 | A kind of acid-washing stainless steel passivation cream and preparation method thereof and application method |
| CN107268002A (en) * | 2017-08-04 | 2017-10-20 | 苏州吉利不锈钢制品有限公司 | A kind of 304 passivating agent for acid-washing stainless steel and preparation method thereof |
| CN107488858A (en) * | 2017-08-04 | 2017-12-19 | 苏州吉利不锈钢制品有限公司 | A kind of austenitic stainless steel passivating agent for acid-washing and preparation method thereof |
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