DE3835393A1 - Process for the chemical treatment of metal components - Google Patents
Process for the chemical treatment of metal componentsInfo
- Publication number
- DE3835393A1 DE3835393A1 DE3835393A DE3835393A DE3835393A1 DE 3835393 A1 DE3835393 A1 DE 3835393A1 DE 3835393 A DE3835393 A DE 3835393A DE 3835393 A DE3835393 A DE 3835393A DE 3835393 A1 DE3835393 A1 DE 3835393A1
- Authority
- DE
- Germany
- Prior art keywords
- ions
- chromic acid
- acid solution
- temperature
- metal components
- 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.)
- Withdrawn
Links
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000126 substance Substances 0.000 title claims abstract description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 12
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract description 12
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000002500 ions Chemical class 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001465 metallisation Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract description 2
- 238000007654 immersion Methods 0.000 abstract 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- 238000009736 wetting Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur chemischen Behandlung von Metallteilen aus vorzugsweise Eisenwerkstoffen in einer Chromsäurelösung vor dem Schmelztauchmetallisieren, insbesondere dem Schmelztauchaluminieren. Diese Behandlung erfolgt zwischen der Reinigung der Oberfläche und dem Schmelztauchmetallisieren zur Sicherung und Verbesserung der Benetzungsfähigkeit.The invention relates to a method for chemical treatment of metal parts of preferably iron materials in a chromic acid solution prior to hot dip metallizing, especially the hot dip aluminizing. This treatment takes place between the cleaning of the surface and the hot dip metallizing for securing and improving wetting ability.
Es ist bekannt, daß Metallteile, die einen Schutzüberzug durch Schmelztauchmetallisierung erhalten sollen, metallisch rein sein müssen und zur Erhöhung der Benetzungsfähigkeit mit der Metallschmelze einer gesonderten chemischen Behandlung unterzogen werden müssen.It is known that metal parts that have a protective coating To receive hot dip metallization, metallic pure and to increase the wetting ability with the Molten metal subjected to a separate chemical treatment Need to become.
Bekannt ist unter anderem, vor Schmelztauchprozessen Metallteile in Chromsäurelösungen zu behandeln. So ist aus dem DD-PS 2 23 730 ein Verfahren zum Tauchaluminieren bekannt. Mit dieser Erfindung werden Erzeugnisse aus Eisen und seinen Legierungen mit gereinigter Oberfläche in einer Lösung aus Chromsäureanhydrid getaucht, danach in Wasser gespült und in eine erwärmte Natriumtetraboratlösung eingebracht, anschließend getrocknet und dem Bad mit geschmolzenen Aluminium zugeführt. Die Anwendung des Verfahrens ist zwar möglich, aber die erreichte Qualität der Aluminiumschutzschicht instabil und damit eine industrielle Anwendung nicht vertretbar.It is known inter alia, before Schmelztauchprozessen metal parts in chromic acid solutions. So is from the DD-PS 2 23 730 a method for Tauchaluminieren known. With This invention relates to products of iron and its alloys with a cleaned surface in a solution of chromic anhydride dipped, then rinsed in water and into a heated sodium tetraborate solution introduced, then dried and fed to the bath with molten aluminum. The application of the method is possible, but the achieved Quality of the aluminum protective layer unstable and thus a industrial application unreasonable.
Die Erfindung hat das Ziel, das Verfahren zur chemischen Behandlung für die Schmelztauchmetallisierung so zu gestalten, daß durch Sicherung und Verbesserung der Benetzungsfähigkeit der Metallteile gegenüber der Schmelze stabile Qualitätsparameter der Metallschutzschichten erreicht werden. The invention has the object, the method of chemical treatment for the hot dip metallization so that by securing and improving the wetting ability of the Metal parts against the melt stable quality parameters of Metal protective layers can be achieved.
Es ist Aufgabe der Erfindung, das Verfahren so stabil zu gestalten, daß die beim industriemäßigen Schmelztauchmetallisieren von nach bekanntem Stand der Technik chemisch behandelten Metallteile entstehenden Schutzschichten den technischen Normen entsprechen.It is an object of the invention to the method so stable make that metallizing in industrial Schmelztauchmetallisieren of chemically treated according to the prior art Metal parts resulting protective coatings technical Comply with standards.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die Metallteile, deren Oberfläche nach an sich bekanntem Verfahren zum Zustand "metallisch rein" gereinigt, in eine Chromsäurelösung mit den ParameternAccording to the invention the object is achieved in that the metal parts, the surface of which is known per se to the state "pure metallic" cleaned, in a chromic acid solution with the parameters
3 . . . 45 g/l CrO₃
mindestens 0,06 g/l Cr3+-Ionen
mindestens 0,04 g/l Fe3+-Ionen3. , , 45 g / l CrO₃
at least 0.06 g / L Cr 3+ ions
at least 0.04 g / l Fe 3+ ions
bei einer Temperatur von 310 . . . 355 K mindestens 60 sec getaucht und bei einer Temperatur von mindestens 350 K getrocknet werden. Die Konzentration der Cr3+- und Fe3+-Ionen der frisch angesetzten Chromsäurelösung kann durch chemische Umsetzung von Metallteilen aus unlegiertem oder niedriglegiertem Stahl mit der Lösung erreicht werden, oder bei Neuansatz der Chromsäurelösung anteilig bereits verwendeter Lösung zugesetzt werden. at a temperature of 310. , , 355 K immersed for at least 60 seconds and dried at a temperature of at least 350 K. The concentration of the Cr 3+ and Fe 3+ ions of the freshly prepared chromic acid solution can be achieved by chemical reaction of metal parts of unalloyed or low-alloyed steel with the solution, or in the case of a new batch of the chromic acid solution proportionately already used solution can be added.
Anhand von Ausführungsbeispielen soll die Erfindung näher erläutert werden.With reference to embodiments, the invention is intended to be closer be explained.
Die Metallteile, deren Oberfläche zum Zustand "metallisch rein" gesäubert wurde, werden in eine Chromsäurelösung, deren Konzentration an Cr3+- und Fe3+-Ionen durch chemische Reaktion von Eisenwerkstoff mit der Behandlungslösung entsteht, folgender Zusammensetzung getaucht:The metal parts, the surface of which has been cleaned to a "metallically pure" state, are immersed in a chromic acid solution whose concentration of Cr 3+ and Fe 3+ ions is formed by chemical reaction of iron material with the treatment solution, of the following composition:
4,0 g/l CrO₃
0,25 g/l Cr3+-Ionen
0,14 g/l Fe3+-Ionen4.0 g / l CrO₃
0.25 g / l Cr 3+ ions
0.14 g / l Fe 3+ ions
Die nach Beispiel 1 vorbehandelten Metallteile werden in eine Chromsäurelösung mitThe pretreated according to Example 1 metal parts are in a Chromic acid solution with
10,0 g/l CrO₃ getaucht.
Die Konzentration von
0,15 g/l Cr3+-Ionen und
0,04 g/l Fe3+-Ionen10.0 g / l CrO₃ dipped.
The concentration of
0.15 g / l Cr 3+ ions and
0.04 g / l Fe 3+ ions
wird durch den Zusatz eines äquivalenten Anteiles einer bereits verwendeten Behandlungslösung erreicht.becomes by the addition of an equivalent portion one already used treatment solution.
Claims (3)
mindestens 0,06 g/l Cr3+-Ionen
mindestens 0,04 g/l Fe3+-Ionenbei einer Temperatur von 310 . . . 355 K mindestens 60 sec getaucht und bei einer Temperatur von mindestens 350 K getrocknet werden.1. A process for the chemical treatment of metal parts of preferably iron materials in a chromic acid solution before the hot dipped metallization, characterized in that the metal parts with a metallically pure surface in a solution with the parameters. 3 , , 45 g / l CrO₃
at least 0.06 g / L Cr 3+ ions
at least 0.04 g / L Fe 3+ ions at a temperature of 310. , , 355 K immersed for at least 60 seconds and dried at a temperature of at least 350 K.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD88313658A DD270092A1 (en) | 1988-03-14 | 1988-03-14 | METHOD FOR THE CHEMICAL TREATMENT OF METAL PARTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3835393A1 true DE3835393A1 (en) | 1989-09-28 |
Family
ID=5597621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3835393A Withdrawn DE3835393A1 (en) | 1988-03-14 | 1988-10-18 | Process for the chemical treatment of metal components |
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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032683A1 (en) * | 1997-12-19 | 1999-07-01 | Sms Demag Ag | Method for producing a strip-like metal composite by high temperature dip coating |
-
1988
- 1988-03-14 DD DD88313658A patent/DD270092A1/en not_active IP Right Cessation
- 1988-10-18 DE DE3835393A 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 JP63319344A 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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032683A1 (en) * | 1997-12-19 | 1999-07-01 | Sms Demag Ag | Method for producing a strip-like metal composite by high temperature dip coating |
| US6436556B1 (en) * | 1997-12-19 | 2002-08-20 | Sms Demag Ag | Method for producing a strip-like metal composite by high temperature dip coating |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8803881A0 (en) | 1989-09-15 |
| NL8802867A (en) | 1989-10-02 |
| DD270092A1 (en) | 1989-07-19 |
| SE8803881D0 (en) | 1988-10-28 |
| BE1001732A6 (en) | 1990-02-20 |
| PL278173A1 (en) | 1989-12-11 |
| FR2628443A1 (en) | 1989-09-15 |
| JPH01290777A (en) | 1989-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |