WO2019006625A1 - Chromium-free passivator, aluminum workpiece and surface passivation process therefor - Google Patents

Chromium-free passivator, aluminum workpiece and surface passivation process therefor Download PDF

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Publication number
WO2019006625A1
WO2019006625A1 PCT/CN2017/091560 CN2017091560W WO2019006625A1 WO 2019006625 A1 WO2019006625 A1 WO 2019006625A1 CN 2017091560 W CN2017091560 W CN 2017091560W WO 2019006625 A1 WO2019006625 A1 WO 2019006625A1
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Prior art keywords
parts
chromium
passivation
aluminum workpiece
passivating agent
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PCT/CN2017/091560
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French (fr)
Chinese (zh)
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万华
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深圳市盈恒科技有限公司
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Priority to PCT/CN2017/091560 priority Critical patent/WO2019006625A1/en
Publication of WO2019006625A1 publication Critical patent/WO2019006625A1/en

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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
    • 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
    • C23C22/40—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 molybdates, tungstates or vanadates
    • C23C22/44—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 molybdates, tungstates or vanadates containing also fluorides or complex fluorides

Definitions

  • Chromium-free passivating agent, aluminum workpiece and surface passivation treatment method thereof Chromium-free passivating agent, aluminum workpiece and surface passivation treatment method thereof
  • the present invention relates to the field of metal surface treatment technology, and in particular, to a chromium-free passivating agent, an aluminum workpiece, and a surface passivation treatment method thereof.
  • the surface treatment technology of the workpiece is usually applied.
  • the surface treatment of aluminum, iron and their alloys goes deep into all walks of life.
  • most of the work needs to be pretreated before surface treatment, for example, cleaning, decontamination and degreasing, and some applications of aluminum workpieces need to be passivated.
  • the passivation treatment generally uses a passivating agent to pretreat the aluminum workpiece to form a film layer on the surface of the aluminum workpiece for subsequent surface treatment, thereby increasing the bonding force and corrosion resistance of the subsequent film.
  • Conventional passivation generally treats chromium ions with passivation, which does not meet environmental requirements and the process requirements of some businesses.
  • a chromium-free passivating agent with good corrosion resistance and strong bonding force, and a surface passivation treatment method for an aluminum workpiece and an aluminum workpiece obtained by passivation treatment are provided, and the passivation agent is environmentally friendly. Non-toxic, easy to process, washed after passivation.
  • a chromium-free passivating agent for surface pretreatment of an aluminum workpiece comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of ammonium fluorotitanate, 2-20 parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyltriacetoxysilane and the balance water.
  • a method for surface passivation treatment of an aluminum workpiece comprising the steps of: formulating a chromium-free passivating agent as described above; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 4-20% Control the passivation solution to a pH of 3-5; pass the passivation solution onto the surface of the aluminum workpiece by dipping or spraying, washing with water, and drying.
  • the film formed by the above-mentioned chromium-free passivating agent has good corrosion resistance, can be used as a coating treatment bottom layer, and is processed by an aluminum workpiece, directly rolled up, not washed with water, and is very convenient to use, and the passivating agent does not contain damage.
  • the environment's chromium ions and other heavy metals are green products that comply with the EU ROHS Directive.
  • Embodiments of the present invention provide a chromium-free passivating agent for surface pretreatment of an aluminum workpiece, comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of ammonium fluorotitanate, 2-20 Parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyl triacetoxysilane and the balance water.
  • the parts by weight of the ammonium fluorotitanate are preferably 10-20 parts by weight.
  • the parts by weight of the malic acid are preferably 5 to 10 parts by weight.
  • the magnesium fluoride is preferably in an amount of 2 to 6 parts by weight.
  • the alkenyl triacetoxysilane is preferably 2 to 6 parts by weight.
  • the passivating agent has a rhodium ratio of 4 to 20% by weight, a pH of preferably 3-5, and a weak acidity.
  • a preferable film forming effect is achieved by controlling the balance of the respective distribution ratios.
  • ammonium fluorotitanate and magnesium fluoride are the main components of the film layer
  • malic acid is a filming aid and a pH adjuster
  • alkenyl triacetoxysilane acts as a filler to increase the corrosion resistance and adhesion of the film.
  • Embodiments of the present invention also provide a method for surface passivation treatment of an aluminum workpiece, comprising the steps of: formulating a chromium-free passivating agent as described above; formulating a chromium-free passivating agent into a mass percentage of 4- 20% passivation solution; control the passivation solution to a pH of 3-5; pass the passivation solution onto the surface of the aluminum workpiece by dipping or spraying, washing with water, and drying.
  • the mass percentage of the passivating agent in the passivating agent solution is preferably 10-15%, and the ruthenium is sprayed onto the surface of the aluminum workpiece, and the impregnation method may also be employed.
  • the treatment temperature is normal temperature, such as 20-25 °C.
  • the surface of the aluminum workpiece is further subjected to passivation, oxidation resistance or coating treatment.
  • the drying temperature is controlled at about 80 degrees, and should not be too high to prevent cracks in the film.
  • Embodiments of the present invention also provide an aluminum workpiece which is treated by a surface passivation treatment method of an aluminum workpiece as described above to form passivation on the surface of the aluminum workpiece. Passivation protects aluminum workpieces and can be used as a coating The bottom layer is convenient for subsequent painting and the like.
  • the passivating agent of this embodiment can also be applied to other materials, such as surface treatment processes that can be widely applied to automotive, furniture, electronic equipment, household appliances, CPU radiators, sports equipment, and the like, of course.
  • the aluminum article in these products can be treated with the passivating agent of this embodiment to form passivation.
  • the ingredients are mixed according to the following parts by weight: 5 parts by weight of ammonium fluorotitanate, 2 parts of malic acid, based on 1000 parts by weight
  • Treatment method preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 20%; controlling the pH of the passivating agent solution to be 4; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
  • the components are mixed in the following parts by weight: 1000 parts by weight, 10 parts of ammonium fluorotitanate, 5 parts of malic acid, 4 parts of magnesium fluoride, 4 parts of alkenyl triacetoxysilane and the balance water Stir, mix well and prepare as passivating agent.
  • Processing method preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 4; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
  • the components are mixed in the following parts by weight: 15 parts by weight of ammonium fluorotitanate, 5 parts of malic acid, 6 parts of magnesium fluoride, 6 parts of alkenyl triacetoxysilane and the balance water in terms of 1000 parts by weight Stir, mix well and prepare as passivating agent.
  • Treatment method preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a blunt mass percentage of 50%
  • the solution is controlled to have a pH of 3.5; at normal temperature, the surface of the aluminum workpiece is immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
  • the components are mixed in the following parts by weight: 20 parts by weight of ammonium fluorotitanate, 10 parts of malic acid, 6 parts of magnesium fluoride, 6 parts of alkenyl triacetoxysilane and the balance water in 1000 parts by weight Stir, mix well and prepare as passivating agent.
  • Treatment method preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 3; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
  • the components are mixed according to the following parts by weight: 30 parts by weight of ammonium fluorotitanate, 20 parts of malic acid, 8 parts of magnesium fluoride, 8 parts of alkenyl triacetoxysilane and the balance water in 1000 parts by weight Stir, mix well and prepare as passivating agent.
  • Treatment method preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 3; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.

Abstract

A chromium-free passivator, an aluminum workpiece and a surface passivation process therefor. The chromium-free passivator is used for surface pretreatment of an aluminum workpiece and comprises the following components in parts by weight per 1000 parts by weight of the chromium-free passivator: 5-50 parts of ammonium hexafluorotitanate, 2-20 parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyltriacetoxysilane and the balance of water. The film formed by the above chromium-free passivator has good anti-corrosion properties and strong adhesion with a coating and can be used conveniently as a coating primer, which can be impregnated or sprayed on an aluminum workpiece. The passivator does not contain chromium ion and other heavy metal that will damage the environment, and therefore is an eco-friendly product complying with the EU RoHS directive.

Description

无铬钝化剂、 铝工件及其表面钝化处理方法 技术领域  Chromium-free passivating agent, aluminum workpiece and surface passivation treatment method thereof
[0001] 本发明涉及金属表面处理技术领域， 具体涉及一种无铬钝化剂、 铝工件及其表 面钝化处理方法。  [0001] The present invention relates to the field of metal surface treatment technology, and in particular, to a chromium-free passivating agent, an aluminum workpiece, and a surface passivation treatment method thereof.
背景技术  Background technique
[0002] 为提高产品表面性能或者外观， 通常对工件表面处理技术。 例如， 铝、 铁及其 合金的表面处理工艺深入各行各业中。 而且， 大多数工作在进行表面处理前还 需要经过预处理， 例如， 进行清洗， 除污除油， 某些用途的铝工件还需要进行 钝化处理。  [0002] In order to improve the surface properties or appearance of a product, the surface treatment technology of the workpiece is usually applied. For example, the surface treatment of aluminum, iron and their alloys goes deep into all walks of life. Moreover, most of the work needs to be pretreated before surface treatment, for example, cleaning, decontamination and degreasing, and some applications of aluminum workpieces need to be passivated.
[0003] 钝化处理一般采用钝化剂对铝工件进行预处理， 以在铝工件表面形成膜层， 以 便进行后续的表面处理， 增加后续膜的结合力和防腐力。 传统钝化一般钝化处 理含铬离子， 不能满足环保需求跟一些商家的工艺要求。  [0003] The passivation treatment generally uses a passivating agent to pretreat the aluminum workpiece to form a film layer on the surface of the aluminum workpiece for subsequent surface treatment, thereby increasing the bonding force and corrosion resistance of the subsequent film. Conventional passivation generally treats chromium ions with passivation, which does not meet environmental requirements and the process requirements of some businesses.
技术问题  technical problem
[0004] 有鉴于此， 提供一种耐蚀性好、 结合力强的无铬钝化剂， 以及铝工件表面钝化 处理方法和经过钝化处理后制得的铝工件， 此钝化剂环保无毒， 工艺简便， 钝 化后水洗。  [0004] In view of the above, a chromium-free passivating agent with good corrosion resistance and strong bonding force, and a surface passivation treatment method for an aluminum workpiece and an aluminum workpiece obtained by passivation treatment are provided, and the passivation agent is environmentally friendly. Non-toxic, easy to process, washed after passivation.
问题的解决方案  Problem solution
技术解决方案  Technical solution
[0005] 一种无铬钝化剂， 用于铝工件表面预处理， 以 1000重量份计， 包括如下重量份 数的成分： 5-50份氟钛酸铵， 2-20份的苹果酸， 2-10份氟化镁， 2-10份烯基三乙 酰氧基硅烷和余量水。  [0005] A chromium-free passivating agent for surface pretreatment of an aluminum workpiece, comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of ammonium fluorotitanate, 2-20 parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyltriacetoxysilane and the balance water.
[0006] 一种铝工件表面钝化处理方法， 其包括下列步骤： 配制如上所述的无铬钝化剂 ； 将无铬钝化剂配制成质量百分含量为 4-20%的钝化溶液； 控制钝化剂溶液的 PH 值为 3-5; 将钝化溶液通过浸渍或喷淋于铝工件表面， 水洗， 烘干。  [0006] A method for surface passivation treatment of an aluminum workpiece, comprising the steps of: formulating a chromium-free passivating agent as described above; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 4-20% Control the passivation solution to a pH of 3-5; pass the passivation solution onto the surface of the aluminum workpiece by dipping or spraying, washing with water, and drying.
[0007] 以及， 一种铝工件， 其表面具有通过如上所述的铝工件表面钝化处理方法形成 的钝化。 发明的有益效果 And an aluminum workpiece having a surface having passivation formed by an aluminum workpiece surface passivation treatment method as described above. Advantageous effects of the invention
有益效果  Beneficial effect
[0008] 上述无铬钝化剂形成的膜层耐蚀性好， 可作为涂装处理底层， 处理铝工件吋， 直接滚涂上去， 不用水洗， 使用起来非常方便， 该钝化剂不含损害环境的铬离 子及其它重金属， 是一种绿色环保产品， 符合欧盟 ROHS指令。  [0008] The film formed by the above-mentioned chromium-free passivating agent has good corrosion resistance, can be used as a coating treatment bottom layer, and is processed by an aluminum workpiece, directly rolled up, not washed with water, and is very convenient to use, and the passivating agent does not contain damage. The environment's chromium ions and other heavy metals are green products that comply with the EU ROHS Directive.
本发明的实施方式 Embodiments of the invention
[0009] 以下将结合具体实施例对本发明进行详细说明。 The present invention will be described in detail below with reference to specific embodiments.
[0010] 本发明实施例提供一种无铬钝化剂， 用于铝工件表面预处理， 以 1000重量份计 ， 包括如下重量份数的成分： 5-50份氟钛酸铵， 2-20份的苹果酸， 2-10份氟化镁 ， 2-10份烯基三乙酰氧基硅烷和余量水。  [0010] Embodiments of the present invention provide a chromium-free passivating agent for surface pretreatment of an aluminum workpiece, comprising 1000 parts by weight, including the following parts by weight: 5-50 parts of ammonium fluorotitanate, 2-20 Parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyl triacetoxysilane and the balance water.
[0011] 具体地， 所述氟钛酸铵的重量份数优选为 10-20份。 所述苹果酸的重量份数优 选为 5-10份。 所述氟化镁的重量份数优选为 2-6份。 所述烯基三乙酰氧基硅烷的 重量份数优选为 2-6份。 所述钝化剂使用吋的配比为 4-20wt%， PH值优选为 3-5， 呈弱酸性。  [0011] Specifically, the parts by weight of the ammonium fluorotitanate are preferably 10-20 parts by weight. The parts by weight of the malic acid are preferably 5 to 10 parts by weight. The magnesium fluoride is preferably in an amount of 2 to 6 parts by weight. The alkenyl triacetoxysilane is preferably 2 to 6 parts by weight. The passivating agent has a rhodium ratio of 4 to 20% by weight, a pH of preferably 3-5, and a weak acidity.
[0012] 在上述无铬钝化剂中， 通过控制各成分配比平衡， 以达到较佳成膜效果。 例如 ， 氟钛酸铵、 氟化镁为膜层主要成分， 苹果酸为成膜辅助剂和 PH调节剂， 烯基 三乙酰氧基硅烷起填充覆盖作用， 增加膜层耐蚀性和附着力。  [0012] In the above chromium-free passivating agent, a preferable film forming effect is achieved by controlling the balance of the respective distribution ratios. For example, ammonium fluorotitanate and magnesium fluoride are the main components of the film layer, malic acid is a filming aid and a pH adjuster, and alkenyl triacetoxysilane acts as a filler to increase the corrosion resistance and adhesion of the film.
[0013] 本发明实施例还提供一种铝工件表面钝化处理方法， 其包括下列步骤： 配制如 上所述的无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 4-20%的钝化溶液； 控制钝化剂溶液的 PH值为 3-5; 将钝化溶液通过浸渍或喷淋于铝工件表面， 水洗 ， 烘干。  [0013] Embodiments of the present invention also provide a method for surface passivation treatment of an aluminum workpiece, comprising the steps of: formulating a chromium-free passivating agent as described above; formulating a chromium-free passivating agent into a mass percentage of 4- 20% passivation solution; control the passivation solution to a pH of 3-5; pass the passivation solution onto the surface of the aluminum workpiece by dipping or spraying, washing with water, and drying.
[0014] 具体地， 钝化剂溶液中钝化剂的质量百分含量优选为 10-15%， 处理吋， 喷淋到 铝工件表面上去， 也可采用浸渍方式。 处理温度为常温， 如 20-25°C。 另外， 在 形成钝化后， 进一步对铝工件表面进行钝化、 抗氧化或涂装处理。 烘干温度控 制在 80度左右， 不宜过高， 防止膜层出现裂痕。  [0014] Specifically, the mass percentage of the passivating agent in the passivating agent solution is preferably 10-15%, and the ruthenium is sprayed onto the surface of the aluminum workpiece, and the impregnation method may also be employed. The treatment temperature is normal temperature, such as 20-25 °C. In addition, after the passivation is formed, the surface of the aluminum workpiece is further subjected to passivation, oxidation resistance or coating treatment. The drying temperature is controlled at about 80 degrees, and should not be too high to prevent cracks in the film.
[0015] 本发明实施例还提供一种铝工件， 其通过如上所述的铝工件表面钝化处理方法 进行处理， 在铝工件表面形成钝化。 钝化可对铝工件进行保护， 可作为涂装处 理底层， 便于后续涂装等处理。 除铝型材外， 本实施例的钝化剂还可应用于其 它材料， 例如可广泛地应用于汽车、 家俱、 电子仪器、 家用电器、 CPU散热器、 运动器材等产品部件的表面处理工艺， 当然这些产品中的铝制品可以采用本实 施例的钝化剂进行处理， 形成钝化。 [0015] Embodiments of the present invention also provide an aluminum workpiece which is treated by a surface passivation treatment method of an aluminum workpiece as described above to form passivation on the surface of the aluminum workpiece. Passivation protects aluminum workpieces and can be used as a coating The bottom layer is convenient for subsequent painting and the like. In addition to aluminum profiles, the passivating agent of this embodiment can also be applied to other materials, such as surface treatment processes that can be widely applied to automotive, furniture, electronic equipment, household appliances, CPU radiators, sports equipment, and the like, of course. The aluminum article in these products can be treated with the passivating agent of this embodiment to form passivation.
[0016] 以下通过具体实例说明本发明实施例的无铬钝化剂及其处理方法等方面。  [0016] The chromium-free passivating agent and its treatment method and the like of the embodiments of the present invention are described below by way of specific examples.
[0017] 实施例 1 [0017] Embodiment 1
[0018] 按照下列重量份数混合各成分： 以 1000重量份计， 5份氟钛酸铵， 2份的苹果酸  [0018] The ingredients are mixed according to the following parts by weight: 5 parts by weight of ammonium fluorotitanate, 2 parts of malic acid, based on 1000 parts by weight
， 2份氟化镁， 2份烯基三乙酰氧基硅烷和余量水， 搅拌， 混合均匀， 配制成钝 化剂。  2 parts of magnesium fluoride, 2 parts of alkenyl triacetoxysilane and the balance of water, stirred, uniformly mixed, and formulated into a passivating agent.
[0019] 处理方法： 配制好无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 20%的钝 化溶液； 控制钝化剂溶液的 PH值为 4; 在常温下， 将铝工件表面浸渍于钝化溶液 中， 处理 10分钟， 水洗， 在 80度下烘干。  [0019] Treatment method: preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 20%; controlling the pH of the passivating agent solution to be 4; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
[0020] 经过上述钝化剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 48 小吋以上， 油漆涂装后附着力明显提高。  [0020] After the above-mentioned passivating agent solution treatment, it was found that the corrosion resistance of the workpiece was greatly improved, and the neutral salt spray test was over 48 hours, and the adhesion after the paint coating was significantly improved.
[0021] 实施例 2  Embodiment 2
[0022] 按照下列重量份数混合各成分： 以 1000重量份计， 10份氟钛酸铵， 5份的苹果 酸， 4份氟化镁， 4份烯基三乙酰氧基硅烷和余量水， 搅拌， 混合均匀， 配制成 钝化剂。  [0022] The components are mixed in the following parts by weight: 1000 parts by weight, 10 parts of ammonium fluorotitanate, 5 parts of malic acid, 4 parts of magnesium fluoride, 4 parts of alkenyl triacetoxysilane and the balance water Stir, mix well and prepare as passivating agent.
[0023] 处理方法： 配制好无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 50%的钝 化溶液； 控制钝化剂溶液的 PH值为 4; 在常温下， 将铝工件表面浸渍于钝化溶液 中， 处理 10分钟， 水洗， 在 80度下烘干。  [0023] Processing method: preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 4; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
[0024] 经过上述钝化剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 52 小吋以上， 油漆涂装后附着力明显提高。  [0024] After the above passivation agent solution treatment, it was found that the corrosion resistance of the workpiece was greatly improved, and the neutral salt spray test was more than 52 吋, and the adhesion after the paint coating was significantly improved.
[0025] 实施例 3  Embodiment 3
[0026] 按照下列重量份数混合各成分： 以 1000重量份计， 15份氟钛酸铵， 5份的苹果 酸， 6份氟化镁， 6份烯基三乙酰氧基硅烷和余量水， 搅拌， 混合均匀， 配制成 钝化剂。  [0026] The components are mixed in the following parts by weight: 15 parts by weight of ammonium fluorotitanate, 5 parts of malic acid, 6 parts of magnesium fluoride, 6 parts of alkenyl triacetoxysilane and the balance water in terms of 1000 parts by weight Stir, mix well and prepare as passivating agent.
[0027] 处理方法： 配制好无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 50%的钝 化溶液； 控制钝化剂溶液的 PH值为 3.5; 在常温下， 将铝工件表面浸渍于钝化溶 液中， 处理 10分钟， 水洗， 在 80度下烘干。 [0027] Treatment method: preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a blunt mass percentage of 50% The solution is controlled to have a pH of 3.5; at normal temperature, the surface of the aluminum workpiece is immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
[0028] 经过上述钝化剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 60 小吋以上， 油漆涂装后附着力明显提高。 [0028] After the above-mentioned passivating agent solution treatment, it was found that the corrosion resistance of the workpiece was greatly improved, and the neutral salt spray test was more than 60 吋, and the adhesion after the paint coating was significantly improved.
[0029] 实施例 4 Embodiment 4
[0030] 按照下列重量份数混合各成分： 以 1000重量份计， 20份氟钛酸铵， 10份的苹果 酸， 6份氟化镁， 6份烯基三乙酰氧基硅烷和余量水， 搅拌， 混合均匀， 配制成 钝化剂。  [0030] The components are mixed in the following parts by weight: 20 parts by weight of ammonium fluorotitanate, 10 parts of malic acid, 6 parts of magnesium fluoride, 6 parts of alkenyl triacetoxysilane and the balance water in 1000 parts by weight Stir, mix well and prepare as passivating agent.
[0031] 处理方法： 配制好无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 50%的钝 化溶液； 控制钝化剂溶液的 PH值为 3; 在常温下， 将铝工件表面浸渍于钝化溶液 中， 处理 10分钟， 水洗， 在 80度下烘干。  [0031] Treatment method: preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 3; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
[0032] 经过上述钝化剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 62 小吋以上， 油漆涂装后附着力明显提高。  [0032] After the above passivation agent solution treatment, it was found that the corrosion resistance of the workpiece was greatly improved, and the neutral salt spray test was more than 62 吋, and the adhesion after the paint coating was significantly improved.
[0033] 实施例 5  Example 5
[0034] 按照下列重量份数混合各成分： 以 1000重量份计， 30份氟钛酸铵， 20份的苹果 酸， 8份氟化镁， 8份烯基三乙酰氧基硅烷和余量水， 搅拌， 混合均匀， 配制成 钝化剂。  [0034] The components are mixed according to the following parts by weight: 30 parts by weight of ammonium fluorotitanate, 20 parts of malic acid, 8 parts of magnesium fluoride, 8 parts of alkenyl triacetoxysilane and the balance water in 1000 parts by weight Stir, mix well and prepare as passivating agent.
[0035] 处理方法： 配制好无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 50%的钝 化溶液； 控制钝化剂溶液的 PH值为 3; 在常温下， 将铝工件表面浸渍于钝化溶液 中， 处理 10分钟， 水洗， 在 80度下烘干。  [0035] Treatment method: preparing a chromium-free passivating agent; formulating a chromium-free passivating agent into a passivation solution having a mass percentage of 50%; controlling the pH of the passivating agent solution to be 3; at normal temperature, The surface of the aluminum workpiece was immersed in a passivation solution, treated for 10 minutes, washed with water, and dried at 80 degrees.
[0036] 经过上述钝化剂溶液处理后， 发现工件耐腐蚀性大大提高， 中性盐雾测试达 64 小吋以上， 油漆涂装后附着力明显提高。 [0036] After the above-mentioned passivating agent solution treatment, it was found that the corrosion resistance of the workpiece was greatly improved, and the neutral salt spray test was more than 64 吋, and the adhesion after the paint coating was significantly improved.
[0037] 需要说明的是， 本发明并不局限于上述实施方式， 根据本发明的创造精神， 本 领域技术人员还可以做出其他变化， 这些依据本发明的创造精神所做的变化， 都应包含在本发明所要求保护的范围之内。 [0037] It should be noted that the present invention is not limited to the above embodiments, and other changes may be made by those skilled in the art according to the creative spirit of the present invention, and the changes according to the inventive spirit of the present invention should be It is intended to be included within the scope of the invention as claimed.

Claims

权利要求书 Claim
[权利要求 1] 一种无铬钝化剂， 用于铝工件表面预处理， 其特征在于， 以 1000重量 份计， 包括如下重量份数的成分： 5-50份氟钛酸铵， 2-20份的苹果酸 ， 2-10份氟化镁， 2-10份烯基三乙酰氧基硅烷和余量水。  [Claim 1] A chromium-free passivating agent for surface pretreatment of an aluminum workpiece, characterized by comprising, by weight of 1000 parts by weight, of the following parts by weight: 5-50 parts of ammonium fluorotitanate, 2- 20 parts of malic acid, 2-10 parts of magnesium fluoride, 2-10 parts of alkenyl triacetoxysilane and the balance water.
[权利要求 2] 如权利要求 1所述的无铬钝化剂， 其特征在于， 所述氟钛酸铵的重量 份数为 10-30份。  [Claim 2] The chromium-free passivating agent according to claim 1, wherein the ammonium fluorotitanate has a weight fraction of 10 to 30 parts.
[权利要求 3] 如权利要求 1所述的无铬钝化剂， 其特征在于， 所述苹果酸的重量份 数为 5- 10份。  [Claim 3] The chromium-free passivating agent according to claim 1, wherein the malic acid is in an amount of 5 to 10 parts by weight.
[权利要求 4] 如权利要求 1所述的无铬钝化剂， 其特征在于， 所述氟化镁的重量份 数为 2-6份。  [Claim 4] The chromium-free passivation agent according to claim 1, wherein the magnesium fluoride has a weight fraction of 2 to 6 parts.
[权利要求 5] 如权利要求 1所述的无铬钝化剂， 其特征在于， 所述烯基三乙酰氧基 硅烷的重量份数为 2-6份。  [Claim 5] The chromium-free passivation agent according to claim 1, wherein the alkenyltriacetoxysilane is in an amount of 2 to 6 parts by weight.
6.如权利要求 1所述的无铬钝化剂， 其特征在于， 所述钝化剂使用配 比为 4-20wt<¾。  The chromium-free passivating agent according to claim 1, wherein the passivating agent is used in a proportion of 4 to 20 wt < 3⁄4.
7.如权利要求 1所述的无铬钝化剂， 其特征在于， 所述钝化剂的 PH值 为 3-5。  The chromium-free passivating agent according to claim 1, wherein the passivating agent has a pH of 3-5.
8.  8.
一种铝工件表面钝化处理方法， 其包括下列步骤： 配制如权利要求 1- 7任一项所述的无铬钝化剂； 将无铬钝化剂配制成质量百分含量为 4-2 0%的钝化溶液； 控制钝化剂溶液的 PH值为 3-5; 将钝化溶液通过浸渍 或者喷淋于铝工件表面， 水洗， 烘干。  A method for surface passivation treatment of an aluminum workpiece, comprising the steps of: formulating the chromium-free passivating agent according to any one of claims 1 to 7; formulating the chromium-free passivating agent to a mass percentage of 4-2 0% passivation solution; control the passivation solution to have a pH of 3-5; pass the passivation solution onto the surface of the aluminum workpiece by dipping or spraying, washing with water, and drying.
9.一种铝工件， 其特征在于， 所述铝工件表面通过如权利要求 8所述 的铝工件表面钝化处理方法形成有钝化。  An aluminum workpiece characterized in that said aluminum workpiece surface is formed with passivation by the aluminum workpiece surface passivation treatment method according to claim 8.
10.如权利要求 9所述的铝工件， 其特征在于， 在形成钝化后， 进一步 对铝工件表面进行钝化、 抗氧化或涂装处理。  The aluminum workpiece according to claim 9, wherein after the passivation is formed, the surface of the aluminum workpiece is further subjected to passivation, oxidation resistance or coating treatment.
PCT/CN2017/091560 2017-07-03 2017-07-03 Chromium-free passivator, aluminum workpiece and surface passivation process therefor WO2019006625A1 (en)

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CN104060257A (en) * 2014-05-26 2014-09-24 安徽红桥金属制造有限公司 Chromium-free passivator for zinc coating and preparation method of chromium-free passivator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0411606A2 (en) * 1989-08-01 1991-02-06 Nippon Paint Co., Ltd. Surface treatment chemicals and bath for aluminum or its alloy and surface treatment method
US6200693B1 (en) * 1997-05-22 2001-03-13 Henkel Corporation Water-based liquid treatment for aluminum and its alloys
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