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WO2019000448A1 - Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable - Google Patents

Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable Download PDF

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Publication number
WO2019000448A1
WO2019000448A1 PCT/CN2017/091304 CN2017091304W WO2019000448A1 WO 2019000448 A1 WO2019000448 A1 WO 2019000448A1 CN 2017091304 W CN2017091304 W CN 2017091304W WO 2019000448 A1 WO2019000448 A1 WO 2019000448A1
Authority
WO
WIPO (PCT)
Prior art keywords
stainless steel
parts
weight
passivating agent
passivation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/091304
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English (en)
Chinese (zh)
Inventor
王饶玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Hengzhaozhi Technology Co Ltd
Original Assignee
Shenzhen Hengzhaozhi Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Hengzhaozhi Technology Co Ltd filed Critical Shenzhen Hengzhaozhi Technology Co Ltd
Priority to PCT/CN2017/091304 priority Critical patent/WO2019000448A1/fr
Publication of WO2019000448A1 publication Critical patent/WO2019000448A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the present invention relates to the field of metal surface treatment technology, and in particular to a stainless steel passivating agent and a surface passivation treatment method for stainless steel parts.
  • the surface treatment technology of the workpiece is usually applied.
  • the surface treatment of aluminum, iron, zinc 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 stainless steel workpieces need to be passivated.
  • the passivation treatment agent pretreats the stainless steel workpiece to form a passivation film layer on the surface of the stainless steel workpiece, which increases the corrosion resistance of the subsequent film and the bonding force between the coating and the stainless steel workpiece.
  • existing stainless steel passivated workpieces have insufficient performance in terms of corrosion resistance and coating adhesion, and some stainless steels cannot even be painted.
  • a stainless steel passivating agent having good corrosion resistance and adhesion, and a method for treating the surface of a stainless steel member are provided.
  • a stainless steel passivating agent for forming a film on a surface of a stainless steel workpiece comprising 1000 parts by weight, including the following parts by weight: 5-20 parts of zinc nitrate, 3-15 parts of dihydrogen phosphate, 2 - 10 parts sodium molybdate, 0.5-3 parts thiourea, 0.1-1.0 parts citric acid, the balance being deionized water.
  • a method for surface passivation treatment of a stainless steel member comprising the steps of: preparing a stainless steel passivator as described above; immersing the stainless steel workpiece in a passivating solution, and washing the stainless steel workpiece after a predetermined daytime treatment , dry.
  • the passivation film layer formed by the above stainless steel passivating agent has good corrosion resistance and good adhesion between the coating layers.
  • Embodiments of the present invention provide a stainless steel passivating agent for surface pretreatment of a stainless steel workpiece, comprising 1000 parts by weight, including the following parts by weight: 5-20 parts of zinc nitrate, 3-15 parts of phosphoric acid Hydroquinone, 2-10 parts sodium molybdate, 0.5-3 parts thiourea, 0.1-1.0 parts citric acid, the balance being deionized water.
  • the zinc nitrate is preferably 10-20 parts by weight.
  • the dihydrogen phosphate is 5-15 parts by weight
  • the sodium molybdate is 4-10 parts by weight
  • the thiourea is 1-3 parts by weight
  • the citric acid The parts by weight are 0.4-1.0 parts.
  • a preferable film forming effect is achieved by controlling the balance of the respective distribution ratios. For example, if the ratio of zinc nitrate to dihydrogen phosphate is too large, the film layer is too thin or cannot be formed into a film, and if the reaction is too fast, the film formation is too fast and the film is not sufficiently strong.
  • zinc nitrate and dihydrogen phosphate are the main components of the film to protect the stainless steel from corrosion.
  • Sodium molybdate is used as a promoter to promote the formation of the film. If too much film is added, it will loosen and fall off. The layer formation is too long or cannot form a film. Thiourea can increase the corrosion resistance of the film, and citric acid makes the reaction uniform.
  • the passivation film formed of the stainless steel passivating agent has excellent corrosion resistance and adhesion.
  • Embodiments of the present invention also provide a method for surface passivation treatment of a stainless steel member, comprising the steps of: preparing a stainless steel passivating agent as described above; immersing the stainless steel workpiece in a passivating solution, after a predetermined daytime treatment , Wash stainless steel workpiece, dry.
  • the passivating agent solution is controlled to be weakly acidic. Passivation treatment, stainless steel passivator temperature control at room temperature -40 ° C, such as 20 - 40 ° C.
  • the stainless steel workpiece is preferably immersed in the crucible solution for a period of 2 to 10 minutes.
  • stainless steel 304 is taken as an example.
  • the components are mixed according to the following parts by weight: 5 parts of zinc nitrate, 3 parts of dihydrogen phosphate, 2 parts of sodium molybdate, 0.5 parts of thiourea, 0.1 part of citric acid, and the balance is 1000 parts by weight Ionic water, stirring, mixing evenly , formulated as a passivating agent.
  • Treatment method preparing a stainless steel passivating agent; immersing the stainless steel piece in the passivating agent solution, after treating at a temperature of 40 ° C for 10 minutes, washing the stainless steel workpiece and drying.
  • the salt spray was tested for more than 200 hours by a neutral salt spray test, and the adhesion test was carried out according to the adhesion test of 2 hours of boiling water after the spray treatment, and the adhesion was evaluated to Grade 1.
  • the components are mixed according to the following parts by weight: 1000 parts by weight, 10 parts of zinc nitrate, 6 parts of dihydrogen phosphate, 4 parts of sodium molybdate, 1 part of thiourea, 0.3 parts of citric acid, the balance is Ionic water, stirred, evenly mixed, formulated as a passivating agent.
  • Treatment method preparing a stainless steel passivating agent; immersing the stainless steel piece in the passivating agent solution, after treating at a temperature of 40 ° C for 10 minutes, washing the stainless steel workpiece and drying.
  • the salt spray was passed through a neutral salt spray test for more than 300 hours, and after the spray treatment, the adhesion test was carried out according to 2 hours of boiling water adhesion, and the adhesion was evaluated as 1 grade.
  • the components are mixed according to the following parts by weight: 1000 parts by weight, 15 parts of zinc nitrate, 12 parts of dihydrogen phosphate, 7 parts of sodium molybdate, 2 parts of thiourea, 0.7 parts of citric acid, the balance is Ionic water, stirred, evenly mixed, formulated as a passivating agent.
  • Treatment method preparing a stainless steel passivating agent; immersing the stainless steel piece in the passivating agent solution, and after washing at a temperature of 35 ° C for 10 minutes, the stainless steel workpiece is washed and dried.
  • the salt spray was tested for more than 600 hours after the neutral salt spray test, and the adhesion test was carried out according to the adhesion test of 2 hours of boiling water after the spray coating treatment, and the adhesion was evaluated to grade 0.
  • the components are mixed according to the following parts by weight: 1000 parts by weight, 20 parts of zinc nitrate, 15 parts of dihydrogen phosphate, 10 parts of sodium molybdate, 3 parts of thiourea, 1 part of citric acid, the balance is Ionic water, stirred, evenly mixed, formulated as a passivating agent.
  • Processing method preparing a stainless steel passivating agent; immersing the stainless steel piece in the passivating agent solution, and after washing at a temperature of 35 ° C for 10 minutes, the stainless steel workpiece is washed and dried.

Landscapes

  • 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)
  • Chemical Treatment Of Metals (AREA)

Abstract

L'invention concerne un agent passivant en acier inoxydable et un procédé de passivation de la surface d'une pièce en acier inoxydable L'agent passivant en inoxydable est utilisé pour traiter la surface d'une pièce à usiner en acier inoxydable et comprend les composants suivants en 1000 parties en poids : 5 à 20 parties de nitrate de zinc, 3 à 15 parties de dihydrogénophosphate de baryum, 2 à 10 parties de molybdate de sodium, 0,5 à 3 parties de thiourée, 0,1 à 1,0 partie d'acide citrique et le reste d'eau désionisée. Une couche de film de passivation formée par l'agent passivant en acier inoxydable présente une bonne résistance à la corrosion et une bonne résistance à l'abrasion, ainsi qu'une bonne force de liaison.
PCT/CN2017/091304 2017-06-30 2017-06-30 Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable Ceased WO2019000448A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/091304 WO2019000448A1 (fr) 2017-06-30 2017-06-30 Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/091304 WO2019000448A1 (fr) 2017-06-30 2017-06-30 Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable

Publications (1)

Publication Number Publication Date
WO2019000448A1 true WO2019000448A1 (fr) 2019-01-03

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PCT/CN2017/091304 Ceased WO2019000448A1 (fr) 2017-06-30 2017-06-30 Agent passivant en acier inoxydable et procédé de passivation de la surface d'une pièce en acier inoxydable

Country Status (1)

Country Link
WO (1) WO2019000448A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111809171A (zh) * 2020-07-10 2020-10-23 常熟市东升法兰有限公司 一种不锈钢法兰钝化工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101476119A (zh) * 2009-01-23 2009-07-08 上海化学试剂研究所 马氏体不锈钢零件表面钝化处理液、制备方法及应用
CN103572276A (zh) * 2012-07-25 2014-02-12 天津建发精密机械制造有限公司 一种新型除油除锈磷化钝化综合处理剂的制备方法
US20140154525A1 (en) * 2011-02-23 2014-06-05 Enthone Inc. Aqueous solution and method for the formation of a passivation layer
CN104073796A (zh) * 2014-06-30 2014-10-01 句容市博远电子有限公司 一种金属电镀钝化液及其配制方法
CN105420714A (zh) * 2015-11-25 2016-03-23 广东致卓精密金属科技有限公司 高耐蚀性铝合金三价铬复合转化膜的制备方法
CN106086852A (zh) * 2016-08-11 2016-11-09 太仓市凯福士机械有限公司 一种表面处理用经济型钝化液

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101476119A (zh) * 2009-01-23 2009-07-08 上海化学试剂研究所 马氏体不锈钢零件表面钝化处理液、制备方法及应用
US20140154525A1 (en) * 2011-02-23 2014-06-05 Enthone Inc. Aqueous solution and method for the formation of a passivation layer
CN103572276A (zh) * 2012-07-25 2014-02-12 天津建发精密机械制造有限公司 一种新型除油除锈磷化钝化综合处理剂的制备方法
CN104073796A (zh) * 2014-06-30 2014-10-01 句容市博远电子有限公司 一种金属电镀钝化液及其配制方法
CN105420714A (zh) * 2015-11-25 2016-03-23 广东致卓精密金属科技有限公司 高耐蚀性铝合金三价铬复合转化膜的制备方法
CN106086852A (zh) * 2016-08-11 2016-11-09 太仓市凯福士机械有限公司 一种表面处理用经济型钝化液

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111809171A (zh) * 2020-07-10 2020-10-23 常熟市东升法兰有限公司 一种不锈钢法兰钝化工艺

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