NL8802867A - METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS - Google Patents
METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS Download PDFInfo
- Publication number
- NL8802867A NL8802867A NL8802867A NL8802867A NL8802867A NL 8802867 A NL8802867 A NL 8802867A NL 8802867 A NL8802867 A NL 8802867A NL 8802867 A NL8802867 A NL 8802867A NL 8802867 A NL8802867 A NL 8802867A
- Authority
- NL
- Netherlands
- Prior art keywords
- metal parts
- chromic acid
- solution
- chemical treatment
- acid solution
- Prior art date
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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
- C23C22/24—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 hexavalent chromium compounds
- C23C22/30—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 hexavalent chromium compounds containing also trivalent chromium
-
- 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
- C23C22/73—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 characterised by the process
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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
tt
NO 35460 1 INO 35 460 1 I.
Werkwijze voor de chemische behandeling van metalen onderdelenProcess for the chemical treatment of metal parts
De uitvinding heeft betrekking op een werkwijze voor de chemische behandeling van metalen onderdelen uit bij voorkeur ijzeren materialen in een chroomzuuroplossing voor het metalliseren door onderdompelen in de smelt, in het bijzonder het alumineren door onderdompelen in de 5 smelt. Deze behandeling heeft tussen de reiniging van het oppervlak en het metalliseren door dompelen in de smelt plaats om de bevochtigbaarheid te waarborgen en te verbeteren.The invention relates to a process for the chemical treatment of metal parts from preferably iron materials in a chromic acid solution for metallization by melt immersion, in particular aluminization by melt immersion. This treatment takes place between the cleaning of the surface and the metallization by melt-immersion to ensure and improve wettability.
Kenmerk van de bekende technische oplossingen.Characteristic of the known technical solutions.
1010
Het is bekend, dat metalen onderdelen, die een beschermingslaag door metalliseren door onderdompelen in de smelt moeten verkrijgen, metalliek zuiver moeten zijn en ter verhoging van de bevochtigbaarheid met de smelt van metaal aan een afzonderlijke chemische behandeling 15 moeten worden onderworpen.It is known that metal parts which must obtain a protective layer by metallization by melt-immersion must be metallic pure and subjected to a separate chemical treatment in order to increase wettability with metal melt.
Bekend is onder andere om voor onderdompelingsprocessen in de smelt metalen onderdelen in chroomzuuroplossingen te behandelen. Zo is is uit DD-C-223.730 een werkwijze voor het alumineren door dompelen bekend. Het de onderhavige uitvinding worden voortbrengsels uit ijzer en 20 legeringen ervan met gereinigd oppervlak in een oplossing uit chroom-zuuranhydride gedompeld, daarna in water gespoeld en in een verwarmde oplossing van natriumtetraboraat gebracht, vervolgens gedroogd en aan het bad met gesmolten aluminium toegevoerd. De toepassing van de werkwijze is weliswaar mogelijk, maar de bereikte kwaliteit van de bescher- 25 mingslaag van aluminium is niet stabiel en daarmee is hun industriële toepassing niet te verdedigen.It is known, inter alia, to treat metal parts in chromic acid solutions for melt immersion processes. For example, DD-C-223.730 discloses a dipping aluminization process. In the present invention, articles of iron and its alloys with their cleaned surface are dipped in a solution of chromic anhydride, then rinsed in water and placed in a heated solution of sodium tetraborate, then dried and fed to the molten aluminum bath. The application of the method is indeed possible, but the achieved quality of the aluminum protective layer is not stable and thus their industrial application cannot be defended.
Doel van de uitvinding.Object of the invention.
30 De uitvinding heeft ten doel, de werkwijze voor de chemische be handeling voor de metallisering door dompelen in de smelt zodanig vorm te geven, dat door de bevochtigbaarheid te waarborgen en te verbeteren met de metalen onderdelen ten opzichte van de smelt stabiele kwaliteitsparameters van de beschermingslagen van metaal worden bereikt.The object of the invention is to design the process for the chemical treatment for the metallization by melt-immersion in such a way that by ensuring and improving the wettability with the metal parts, quality parameters of the protective layers are stable with respect to the melt. of metal.
3535
Uiteenzetting van het wezen van de uitvinding.Explanation of the essence of the invention.
Probleem van de uitvinding is, de werkwijze zo stabiel vorm te .8802867 t\ 2 geven, dat de bij het metalliseren door dompelen in de smelt op industriële schaal van volgens de bekende stand der techniek chemisch behandelde metalen onderdelen gevormde beschermingslagen aan de technische normen voldoen.The problem of the invention is to give the process such a stable form that the protective layers formed on the industrial scale of metal parts chemically treated metal parts according to the prior art during metallization by melt-immersion by melting meet the technical standards. .
5 Volgens de uitvinding wordt het probleem opgelost, doordat de me talen onderdelen, waarvan de oppervlakken volgens op zichzelf bekende werkwijzen tot de toestand "metalliek zuiver" worden gereinigd, in een chroomzuuroplossing met de parameters 10 3... 45 g/1 OO3 ten minste 0,06 g/1 Cr3+-ionen ten minste 0,04 g/1 Fe3+-ionen bij een temperatuur van 310 - 355 K 15 ten minste 60 s worden gedompeld en bij een temperatuur van ten minste 350 K worden gedroogd. De concentratie van de Cr3+- en Fe3+-i onen van de pas bereide chroomzuuroplossing kan door chemische omzetting van metalen onderdelen uit niet-gelegeerd of laag gelegeerd staal met de oplossing worden bereikt of kan bij nieuw gebruik 20 van de chroomzuuroplossing ten dele aan de reeds toegepaste oplossing worden toegevoegd.According to the invention, the problem is solved in that the metal parts, the surfaces of which are cleaned to the state "metallic pure" by methods known per se, in a chromic acid solution with the parameters 10 3 ... 45 g / 1 OO3 at least 0.04 g / l Cr3 + ions, at least 0.04 g / l Fe3 + ions are immersed at a temperature of 310 - 355 K for at least 60 s and dried at a temperature of at least 350 K. The concentration of the Cr3 + and Fe3 + ions of the freshly prepared chromic acid solution can be achieved by chemical conversion of metal parts from non-alloy or low-alloy steel with the solution or, in new use, of the chromic acid solution, in part to the already used solution are added.
Ui tvoeri ngsvoorbeel den.Execution examples.
25 Aan de hand van uitvoeringsvoorbeelden zal de uitvinding nader worden toegelicht.The invention will be further elucidated on the basis of exemplary embodiments.
Voorbeeld I: 30 De metalen onderdelen, waarvan het oppervlak tot de toestand "metalliek zuiver" werd gezuiverd, worden in een chroomzuuroplossing, waarvan de concentratie aan Cr3+- en Fe3+-ionen door chemische reactie van het i jzermateriaal met de behandelingsoplossing ontstaat, met de volgende samenstelling gedompeld: 35 4,0 g/1 OO3 0,25 g/1 Cr3+-ionen 0,14 g/1 Fe3+-ionen c8802867 r 3 1EXAMPLE 1: The metal parts, the surface of which was purified to the state "metallic pure", are mixed in a chromic acid solution, the concentration of Cr3 + and Fe3 + ions of which is formed by chemical reaction of the iron material with the treatment solution. dipped following composition: 35 4.0 g / 1 OO3 0.25 g / 1 Cr3 + ions 0.14 g / 1 Fe3 + ions c8802867 r 3 1
Temperatuur van de oplossing: 323 K Dompeltijd : 270 sSolution temperature: 323 K Immersion time: 270 s
Droogtemperatuur : 360 K.Drying temperature: 360 K.
5 Voorbeeld II:5 Example II:
De volgens voorbeeld II voorafbehandel de metalen onderdelen worden in een chroomzuuroplossing met 10 10,0 g/1 Cr03 gedompeld.The metal parts are pretreated according to Example II and immersed in a chromic acid solution with 10.0 g / l CrO 3.
De concentratie van 0,15 g/1 Cr3+-ionen en 15 0,04 g/1 Fe3+-ionen wordt door de toevoeging van een equivalente hoeveelheid van een reeds toegepaste behandelingsoplossing bereikt.The concentration of 0.15 g / l Cr3 + ions and 0.04 g / l Fe3 + ions is achieved by the addition of an equivalent amount of a treatment solution already used.
20 Temperatuur van de oplossing: 310 K20 Temperature of the solution: 310 K.
Dompeltijd : 90 sImmersion time: 90 s
Droogtemperatuur : 375 K.Drying temperature: 375 K.
.8802867.8802867
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD31365888 | 1988-03-14 | ||
| DD31365888A DD270092A1 (en) | 1988-03-14 | 1988-03-14 | METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8802867A true NL8802867A (en) | 1989-10-02 |
Family
ID=5597621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8802867A NL8802867A (en) | 1988-03-14 | 1988-11-21 | METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPH01290777A (en) |
| BE (1) | BE1001732A6 (en) |
| DD (1) | DD270092A1 (en) |
| DE (1) | DE3835393A1 (en) |
| FR (1) | FR2628443A1 (en) |
| NL (1) | NL8802867A (en) |
| PL (1) | PL278173A1 (en) |
| SE (1) | SE8803881A0 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19758140A1 (en) * | 1997-12-19 | 1999-07-08 | Mannesmann Ag | Process for producing composite metal products |
-
1988
- 1988-03-14 DD DD31365888A patent/DD270092A1/en not_active IP Right Cessation
- 1988-10-18 DE DE19883835393 patent/DE3835393A1/en not_active Withdrawn
- 1988-10-28 SE SE8803881A patent/SE8803881A0/en unknown
- 1988-11-21 NL NL8802867A patent/NL8802867A/en not_active Application Discontinuation
- 1988-12-15 FR FR8816542A patent/FR2628443A1/en not_active Withdrawn
- 1988-12-17 JP JP31934488A patent/JPH01290777A/en active Pending
-
1989
- 1989-03-08 BE BE8900251A patent/BE1001732A6/en not_active IP Right Cessation
- 1989-03-10 PL PL27817389A patent/PL278173A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE1001732A6 (en) | 1990-02-20 |
| SE8803881A0 (en) | 1989-09-15 |
| SE8803881A (en) | 1988-10-28 |
| DD270092A1 (en) | 1989-07-19 |
| FR2628443A1 (en) | 1989-09-15 |
| PL278173A1 (en) | 1989-12-11 |
| DE3835393A1 (en) | 1989-09-28 |
| JPH01290777A (en) | 1989-11-22 |
| SE8803881D0 (en) | 1988-10-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| BV | The patent application has lapsed |