CN104419924B - The passivation technology of super-purity ferrite stainless steel - Google Patents
The passivation technology of super-purity ferrite stainless steel Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 30
- 238000002161 passivation Methods 0.000 title claims abstract description 24
- 239000010935 stainless steel Substances 0.000 title claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 title claims 5
- 230000007797 corrosion Effects 0.000 claims abstract description 16
- 238000005260 corrosion Methods 0.000 claims abstract description 16
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000005554 pickling Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000005764 inhibitory process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 7
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
Classifications
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- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (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)
Abstract
本发明公开了超纯铁素体不锈钢的钝化工艺，包括如下步骤：(1)清洗，常温状态下将超纯铁素体不锈钢工件用水清洗；(2)干燥，将工件在清洁的环境中晾干；(3)抛光，将干燥后的工件放在抛光机上对工件外表面进行打磨抛光，使工件表面没有明显的氧化皮；(4)钝化，将工件在常温氢氟酸+缓蚀剂咪唑啉钝化液中浸泡3～8分钟；(5)清洗，在温度为60℃‑70℃的清水中清洗工件残余钝化液；(6)干燥，将工件清洗后的工件置于烘干箱内，在180℃‑220℃下干燥2小时后，取出冷却至室温。本发明的有益效果是：成功解决了超纯铁素体不锈钢在实际生产中欠酸洗或过酸洗的技术难题。The invention discloses a passivation process for ultra-pure ferritic stainless steel, which comprises the following steps: (1) cleaning, washing the ultra-pure ferritic stainless steel workpiece with water at normal temperature; (2) drying, placing the workpiece in a clean environment (3) polishing, the workpiece after drying is placed on the polishing machine and the outer surface of the workpiece is polished and polished, so that there is no obvious scale on the surface of the workpiece; (4) passivation, the workpiece is placed in normal temperature hydrofluoric acid+corrosion inhibition Soak in imidazoline passivation solution for 3 to 8 minutes; (5) Clean, wash the residual passivation solution of the workpiece in clear water with a temperature of 60°C-70°C; (6) Dry, place the cleaned workpiece in an oven In the dry box, after drying at 180°C-220°C for 2 hours, take it out and cool to room temperature. The beneficial effects of the invention are: successfully solving the technical problem of under-pickling or over-pickling of ultra-pure ferritic stainless steel in actual production.
Description
技术领域technical field
本发明涉及超纯铁素体不锈钢的钝化工艺，属于超纯铁素体不锈钢的表面处理工艺领域。The invention relates to a passivation process of ultra-pure ferritic stainless steel and belongs to the field of surface treatment process of ultra-pure ferritic stainless steel.
背景技术Background technique
当前生产、生活中，奥氏体不锈钢应用甚为广泛，随着国际镍价的波动，急需一种价格低廉，性能良好的材料来替代奥氏体不锈钢。In current production and life, austenitic stainless steel is widely used. With the fluctuation of international nickel price, there is an urgent need for a material with low price and good performance to replace austenitic stainless steel.
超纯铁素体不锈钢作为一种新型材料，不但具有普通铁素体不锈钢价格低廉，优良的导热性，导磁性，耐应力腐蚀等特点，而且很好地降低了C、N等杂质含量，明显改善了韧性。但是，由于这种新型材料钝化技术的滞后，却制约着超纯铁素体不锈钢的广泛应用。目前超纯铁素体不锈钢生产中使用的钝化技术大多是沿袭奥氏体不锈钢的酸洗钝化技术，虽然有一定的效果，但仍然存在酸洗质量不稳定，质量不达标的问题。As a new type of material, ultra-pure ferritic stainless steel not only has the characteristics of low price of ordinary ferritic stainless steel, excellent thermal conductivity, magnetic conductivity, stress corrosion resistance, etc., but also reduces the content of impurities such as C and N. Improved toughness. However, due to the lag of passivation technology for this new material, it restricts the wide application of ultra-pure ferritic stainless steel. At present, the passivation technology used in the production of ultra-pure ferritic stainless steel mostly follows the pickling passivation technology of austenitic stainless steel. Although it has a certain effect, there are still problems of unstable pickling quality and substandard quality.
超纯铁素体不锈钢在实际的生产过程中，面临的酸洗钝化问题主要为欠酸洗或过酸洗。国内尚无适用于超纯铁素体不锈钢的新型酸洗钝化工艺。In the actual production process of ultra-pure ferritic stainless steel, the pickling passivation problems faced are mainly under-pickling or over-pickling. There is no new pickling passivation process suitable for ultra-pure ferritic stainless steel in China.
发明内容Contents of the invention
本发明所要解决的技术问题在于：提供超纯铁素体不锈钢的钝化工艺，改进以往的超纯铁素体不锈钢酸洗钝化工艺，解决超纯铁素体不锈钢酸洗过程中的欠酸洗或过酸洗问题，获得高抗蚀性能的超纯铁素体不锈钢工件。The technical problem to be solved by the present invention is to provide a passivation process for ultra-pure ferritic stainless steel, improve the previous pickling passivation process for ultra-pure ferritic stainless steel, and solve the acid deficiency in the pickling process of ultra-pure ferritic stainless steel Washing or pickling problems, to obtain ultra-pure ferritic stainless steel workpieces with high corrosion resistance.
本发明是通过以下技术方案实现的：超纯铁素体不锈钢的钝化工艺，包括如下步骤：The present invention is achieved through the following technical solutions: the passivation process of ultra-pure ferritic stainless steel, comprising the following steps:
(1)清洗，常温状态下将超纯铁素体不锈钢工件用水清洗；(1) Cleaning, the ultra-pure ferritic stainless steel workpiece is cleaned with water under the normal temperature state;
(2)干燥，将工件在清洁的环境中晾干；(2) dry, dry the workpiece in a clean environment;
(3)抛光，将干燥后的工件放在抛光机上对工件外表面进行打磨抛光，使工件表面没有明显的氧化皮；(3) polishing, the workpiece after drying is placed on the polishing machine and the outer surface of the workpiece is polished, so that there is no obvious oxide skin on the surface of the workpiece;
(4)钝化，将工件在常温氢氟酸+缓蚀剂咪唑啉钝化液中浸泡3～8分钟；(4) passivation, soak the workpiece in the passivation solution of hydrofluoric acid + corrosion inhibitor imidazoline at room temperature for 3 to 8 minutes;
(5)清洗，在温度为60-70℃的清水中清洗工件残余钝化液；(5) Cleaning, cleaning the residual passivation solution of the workpiece in clear water with a temperature of 60-70°C;
(6)干燥，将清洗后的工件置于烘干箱内，在180-220℃下干燥2小时后，取出冷却至室温。(6) Drying, place the cleaned workpiece in a drying oven, dry it at 180-220°C for 2 hours, take it out and cool it to room temperature.
所述步骤(4)常温氢氟酸+缓蚀剂咪唑啉钝化液：氢氟酸的质量百分数为30％～45％，缓蚀剂咪唑啉的质量百分数为0.1％～1％，其余成分为水。The step (4) normal temperature hydrofluoric acid + corrosion inhibitor imidazoline passivation solution: the mass percentage of hydrofluoric acid is 30% to 45%, the mass percentage of corrosion inhibitor imidazoline is 0.1% to 1%, and the remaining ingredients for water.
所述的步骤(1)，清洗前将超纯铁素体不锈钢工件在无水乙醇脱脂溶液中浸泡20～30秒脱脂处理，有利于更好的除去超纯铁素体不锈钢工件表面的油污、灰尘等杂物。In the step (1), before cleaning, the ultra-pure ferritic stainless steel workpiece is soaked in anhydrous ethanol degreasing solution for 20 to 30 seconds for degreasing treatment, which is beneficial to better remove the oil stain on the surface of the ultra-pure ferritic stainless steel workpiece, Dust and other sundries.
本发明的有益效果是：采用本发明所描述的超纯铁素体不锈钢的钝化工艺，超纯铁素体不锈钢工件表面形成了完整、致密的钝化膜，其外观质量良好，抗腐蚀性能大幅提升。成功解决了超纯铁素体不锈钢在实际生产中欠酸洗或过酸洗的技术难题。The beneficial effects of the present invention are: adopting the passivation process of the ultra-pure ferritic stainless steel described in the present invention, a complete and dense passivation film is formed on the surface of the ultra-pure ferritic stainless steel workpiece, with good appearance quality and corrosion resistance Substantially improved. Successfully solved the technical problem of under-pickling or over-pickling of ultra-pure ferritic stainless steel in actual production.
具体实施方式detailed description
下面结合具体实施方式对本发明做进一步说明。The present invention will be further described below in combination with specific embodiments.
下面仅举三个实施例列表表示于表1。Only three examples are listed in Table 1 below.
表1Table 1
检测工件缓蚀率η的数据分别为：The data for detecting the corrosion inhibition rate η of the workpiece are respectively:
实施例1样品：69.737％，Example 1 sample: 69.737%,
实施例2样品：71.492％Example 2 sample: 71.492%
实施例3样品：82.272％Example 3 sample: 82.272%
检测工件缓蚀率η方法说明：Description of the method for detecting the corrosion inhibition rate η of the workpiece:
缓蚀效率η作为效应值，用于考核酸洗质量的优劣。Corrosion inhibition efficiency η is used as the effect value to evaluate the quality of nucleic acid cleaning.
η=(Icorr-I′corr)／Icorr×100％η=(I corr -I′ corr )/I corr ×100%
式中，Icorr和I′corr分别为作为对比条件下和不同条件下酸洗液中测得的腐蚀电流密度。In the formula, Icorr and I'corr are the corrosion current densities measured in the pickling solution under comparative conditions and different conditions, respectively.
检测方法介绍如下：采用CS350型电化学工作站，其中动电位极化曲线扫描速率为0.2V／s，数据采样速率为1s／次，测试溶液为3.5％饱和NaCl溶液。电解池采用三电极体系，参比电极为饱和甘汞电极，辅助电极为铂电极，不锈钢工作电极用环氧树脂封装，暴露面积为10mm2，电位为相对于饱和甘汞电极(SCE)的电位。实验检测数据如表2：The detection method is introduced as follows: CS350 electrochemical workstation is used, the potentiodynamic polarization curve scan rate is 0.2V/s, the data sampling rate is 1s/time, and the test solution is 3.5% saturated NaCl solution. The electrolytic cell adopts a three-electrode system, the reference electrode is a saturated calomel electrode, the auxiliary electrode is a platinum electrode, the stainless steel working electrode is encapsulated with epoxy resin, the exposed area is 10mm 2 , and the potential is relative to the saturated calomel electrode (SCE) . The experimental test data are shown in Table 2:
表2Table 2
以上显示采用本发明所描述的超纯铁素体不锈钢的钝化工艺，样品缓蚀率数据令人满意，样品抗腐蚀性能大幅提升，使用德国卡尔蔡司公司Axio Scope.Al金相显微镜观察样品外观质量，样品表面形成了完整、致密的钝化膜，其外观质量良好，成功解决了超纯铁素体不锈钢在实际生产中欠酸洗或过酸洗的技术难题。The above shows that the passivation process of ultra-pure ferritic stainless steel described in the present invention is adopted, the sample corrosion inhibition rate data is satisfactory, and the corrosion resistance of the sample is greatly improved, and the appearance of the sample is observed with the Axio Scope.Al metallographic microscope of Carl Zeiss Company of Germany Quality, a complete and dense passivation film is formed on the surface of the sample, and its appearance quality is good, successfully solving the technical problem of under-pickling or over-pickling of ultra-pure ferritic stainless steel in actual production.
以上所述者，仅为本发明的较佳实施例而已，并非用来限定本发明的实施范围，即凡依本发明所作的均等变化与修饰，皆为本发明权利要求范围所涵盖，这里不再一一举例。The above are only preferred embodiments of the present invention, and are not used to limit the implementation scope of the present invention, that is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention, and are not intended here. Give another example.
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| CN106756943B (en) * | 2016-12-16 | 2019-01-18 | 安徽宝恒新材料科技有限公司 | A kind of deactivating process for the treatment of of stainless steel |
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| CN86101522A (en) * | 1986-07-07 | 1988-01-27 | 上海大明铁工厂 | Acid washing-passivating paste for stainless steel |
| CN101029400A (en) * | 2007-04-02 | 2007-09-05 | 李青 | Direct chromium stainless-steel pickling agent |
| CN101671552A (en) * | 2009-09-28 | 2010-03-17 | 大庆油田有限责任公司 | Silicate scale clearing agent for ternary combination flooding extraction well |
| CN101787525A (en) * | 2009-12-24 | 2010-07-28 | 四川省广汉华威铝业有限公司 | Stainless steel passivation process |
| CN101831659A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Pickling inhibitor and application method thereof |
| CN102653868A (en) * | 2012-03-14 | 2012-09-05 | 王福平 | Novel stainless steel acid-washing passivation liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86101522A (en) * | 1986-07-07 | 1988-01-27 | 上海大明铁工厂 | Acid washing-passivating paste for stainless steel |
| CN101029400A (en) * | 2007-04-02 | 2007-09-05 | 李青 | Direct chromium stainless-steel pickling agent |
| CN101831659A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Pickling inhibitor and application method thereof |
| CN101671552A (en) * | 2009-09-28 | 2010-03-17 | 大庆油田有限责任公司 | Silicate scale clearing agent for ternary combination flooding extraction well |
| CN101787525A (en) * | 2009-12-24 | 2010-07-28 | 四川省广汉华威铝业有限公司 | Stainless steel passivation process |
| CN102653868A (en) * | 2012-03-14 | 2012-09-05 | 王福平 | Novel stainless steel acid-washing passivation liquid |
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