RO113063B1 - Low-pollution solution for colourless-bluish passivation of electrochemical zinc and zinc alloy deposits - Google Patents
Low-pollution solution for colourless-bluish passivation of electrochemical zinc and zinc alloy deposits Download PDFInfo
- Publication number
- RO113063B1 RO113063B1 RO97-00582A RO9700582A RO113063B1 RO 113063 B1 RO113063 B1 RO 113063B1 RO 9700582 A RO9700582 A RO 9700582A RO 113063 B1 RO113063 B1 RO 113063B1
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- RO
- Romania
- Prior art keywords
- zinc
- passivation
- bluish
- colourless
- low
- Prior art date
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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
- C23C22/40—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
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium
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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)
- Chemical Treatment Of Metals (AREA)
Abstract
Prezenta invenție se referă la o soluție de pasivare cu poluare redusă, pe bază de săruri de Cr3+, pentru obținerea peliculelor de culoare incolor-albăstruie pe depunerile electrolitice de zinc și aliaje de zinc. Soluția este constituită din: 1...10 g/l sulfat de crom, 1... 10 g/l azotat de sodiu, 1...10 g/l fluorură de sodiu, 0,1...1 g/l ioni cobalt și molibden, și 0,5...5 cm3/l acid azotic, restul fiind apă.The present invention relates to a passive solution with reduced pollution, on base of Cr3 + salts, to obtain colorless-blue films on electrolytic deposits of zinc and zinc alloys. The solution consists of: 1 ... 10 g / l sulfate of chromium, 1 ... 10 g / l sodium nitrate, 1 ... 10 g / l sodium fluoride, 0.1 ... 1 g / l cobalt ions and molybdenum, and 0.5 ... 5 cm3 / l nitric acid, the rest being water.
Description
Prezenta invenție se referă la o soluție cu poluare redusă pentru pasivarea albăstruie-incoloră a depunerilor electrochimice de zinc și aliaje de zinc, în scopul conferirii acestora unui aspect 5 decorativ comercial, concomitent cu asigurarea unei protecții anticorosive.The present invention relates to a solution with reduced pollution for the blue-colorless passivation of electrochemical deposition of zinc and zinc alloys, in order to give them a commercial decorative appearance, concurrently with providing an anti-corrosive protection.
Pentru pasivarea albăstrui-incoloră a depunerilor de zinc și aliaje de zinc, se cunosc diferite soluții ce conțin 10 amestecuri de săruri de Cr3+,de acizi și/sau sărurile lor, ioni metalici de cobalt, fier, nichel, molibden și oxidanți.For the blue-colorless passivation of zinc deposits and zinc alloys, different solutions containing 10 mixtures of Cr 3+ salts, their acids and / or their salts, cobalt, iron, nickel, molybdenum and oxidants are known.
Aceste soluții au însă o stabilitate chimică în timp limitată, ceea ce duce la 15 degradarea soluțiiilor și dese înlocuiri. Aceste soluții nu permit obținerea unor pelicule pasivante uniform colorate, dure și cu o rezistență la coroziune comparabilă cu a celor obținute din soluțiile 20 poluante cu Cr6+.However, these solutions have limited chemical stability over time, leading to degradation of solutions and frequent replacements. These solutions do not allow the obtaining of uniformly colored, hard and passive films with a corrosion resistance comparable to those obtained from 20 Cr 6+ pollutant solutions.
Problema pe care o rezolvă prezenta invenție este obținerea unor componenți care să asigure soluției de pasivare o stabilitate chimică pe toată du- 25 rata exploatării până la epuizarea completă a soluției, concomitent cu obținerea unei rezistențe la coroziune îmbunătățite.The problem solved by the present invention is to obtain components that provide the passivation solution with chemical stability throughout the lifetime of the operation until the complete depletion of the solution, together with obtaining improved corrosion resistance.
Soluția de pasivare conform in- 30 venției elimină dezavantajele soluțiilor cunoscute, prin aceea că, este constituită din: 1...1O g/l sulfat de crom,The passivation solution according to the invention eliminates the disadvantages of the known solutions, in that it consists of: 1 ... 1O g / l chromium sulphate,
...10 g/l azotat de sodiu, 1... 10 g/l fluorură de sodiu, 0,1...1 g/l ioni cobalt 35 și molibden proveniți din sărurile lor solubile și 0,5...5 cm3/l acid azotic, restul fiind apă.... 10 g / l sodium nitrate, 1 ... 10 g / l sodium fluoride, 0.1 ... 1 g / l cobalt ions 35 and molybdenum from their soluble salts and 0.5 ... 5 cm 3 / l nitric acid, the rest being water.
Avantajele aplicării soluției conform invenției constau în obținerea unor 40 pelicule de pasivare incolor-albăstrui, uniforme, continue și aderente, cu o rezistență la coroziune similară cu a celor obținute din soluțiile cu Cr6+.The advantages of applying the solution according to the invention consist in obtaining 40 colorless-blue, uniform, continuous and adherent passivation films, with a corrosion resistance similar to those obtained from Cr 6+ solutions.
Soluția de pasivare conform in- 45 venției, datorită stabilității chimice, înThe passivation solution according to the invention, due to the chemical stability, in
Președintele comisiei de examinare: ing Examinator, chim. Ștefan Rodica timp are o putere de acoperire superioară celei obținute cu soluțiile cunoscute.Chairman of the Examination Committee: ing Examiner, chem. Rodtefan Rodica time has a higher coverage power than the one obtained with the known solutions.
Se dă în continuare un exemplu de realizare a invenției.An example of the invention is given below.
Soluția de pasivare, conform invenției, conține următorii componenți:The passivation solution according to the invention contains the following components:
1...10 g/l sulfat de crom, 1... 10 g/l azotat de sodiu, 1...10 g/l fluorură de sodiu, 0,1...1 g/l ioni cobalt și molibden proveniți din sărurile lor solubile, 0,5...5 ml/l acid azotic, restul fiind apă.1 ... 10 g / l chromium sulfate, 1 ... 10 g / l sodium nitrate, 1 ... 10 g / l sodium fluoride, 0.1 ... 1 g / l cobalt and molybdenum ions come from their soluble salts, 0.5 ... 5 ml / l nitric acid, the rest being water.
Parametrii de lucru aplicați sunt următorii: temperatura 18...25°C·, timp imersie 20...60 sec, pH=2, agitare soluție cu aer sau prin mișcarea pieselorThe working parameters applied are the following: temperature 18 ... 25 ° C ·, immersion time 20 ... 60 sec, pH = 2, stirring solution with air or by moving parts
Piesele acoperite cu zinc, pasivate cu soluția conform invenției, prezintă o peliculă pasivă incolor-albăstruie, uniformă, continuă, aderentă, prezentând o rezistență la coroziune de 96 ore ceata salină până la apariția produșilor albi de coroziune și 184 ore ceață salină până la apariția coroziunii metalului de bază.The zinc coated parts, passivated with the solution according to the invention, have a colorless-blue, uniform, continuous, adherent passive film, having a corrosion resistance of 96 hours saline fog until the appearance of white corrosion products and 184 hours saline fog until the appearance corrosion of the base metal.
Piesele acoperite cu aliaje de zinc pasivate, cu soluția conform invenției, prezintă o peliculă pasivă incolor-albăstruie, uniformă, continuă, aderentă prezentând o rezistență la coroziune de 1 20 ore ceață salină până la apariția produșilor albi de coroziune și 240 până la coroziunea metalului de bază.The parts coated with passive zinc alloys, with the solution according to the invention, have a colorless-blue, uniform, continuous, adherent, passive film having a corrosion resistance of 1 20 hours saline fog until the appearance of white corrosion products and 240 until the metal corrosion. Basic.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO97-00582A RO113063B1 (en) | 1997-03-24 | 1997-03-24 | Low-pollution solution for colourless-bluish passivation of electrochemical zinc and zinc alloy deposits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO97-00582A RO113063B1 (en) | 1997-03-24 | 1997-03-24 | Low-pollution solution for colourless-bluish passivation of electrochemical zinc and zinc alloy deposits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO113063B1 true RO113063B1 (en) | 1998-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO97-00582A RO113063B1 (en) | 1997-03-24 | 1997-03-24 | Low-pollution solution for colourless-bluish passivation of electrochemical zinc and zinc alloy deposits |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO113063B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741129A (en) * | 2014-01-22 | 2014-04-23 | 哈尔滨三泳工大科技有限公司 | Zinc coating trivalent chromium blue white passivating agent with high corrosion resistance |
| WO2015165956A1 (en) * | 2014-05-01 | 2015-11-05 | Henkel Ag & Co. Kgaa | Non chromate colored conversion coating for aluminum |
-
1997
- 1997-03-24 RO RO97-00582A patent/RO113063B1/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741129A (en) * | 2014-01-22 | 2014-04-23 | 哈尔滨三泳工大科技有限公司 | Zinc coating trivalent chromium blue white passivating agent with high corrosion resistance |
| CN103741129B (en) * | 2014-01-22 | 2015-09-30 | 哈尔滨三泳工大科技有限公司 | The high anti-corrosion blue-white deactivator of zinc coating trivalent chromium |
| WO2015165956A1 (en) * | 2014-05-01 | 2015-11-05 | Henkel Ag & Co. Kgaa | Non chromate colored conversion coating for aluminum |
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