WO2000018983A1 - Vorbereitung von werkstücken für die kaltumformung - Google Patents
Vorbereitung von werkstücken für die kaltumformung Download PDFInfo
- Publication number
- WO2000018983A1 WO2000018983A1 PCT/EP1999/006978 EP9906978W WO0018983A1 WO 2000018983 A1 WO2000018983 A1 WO 2000018983A1 EP 9906978 W EP9906978 W EP 9906978W WO 0018983 A1 WO0018983 A1 WO 0018983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- workpieces
- solution
- acid
- lactic acid
- rinsing
- Prior art date
Links
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
- C23C22/78—Pretreatment of the material to be coated
Definitions
- the invention relates to a method for preparing phosphatable workpieces for non-cutting cold forming by acid pickling, rinsing, drying and treatment with acidic reaction lubricants containing phosphate ions.
- Acidic reaction lubricants have an oily character and are characterized in that, in addition to an organic lubricant, they contain constituents which are capable of forming a conversion coating on the surface of the workpiece to be formed (US Pat. Nos. 3,525,651, 2,739,915) , DE-B-21 02 295, EP-A-24 062, EP-A-25 236).
- the most important reaction lubricants in practice contain phosphoric acid or zinc phosphate as the component that forms the conversion coating. In the presence of phosphoric acid, the treatment of the workpieces to be reshaped essentially produces iron phosphate layers, and when using reaction phosphates containing zinc phosphate, conversion layers of zinc phosphate or zinc iron phosphate are used.
- reaction lubricants which are usually applied in dipping, produce a firmly integrated conversion coating on the surface of the workpiece, which ensures that there is a high degree of separation of the workpiece and the forming tool during the forming process takes place, on the other hand there is a firm bond of the organic lubricant on the workpiece surface.
- the subsequent processing of the workpieces which usually follows before contact with the reaction lubricant, is carried out by drying, if appropriate after rinsing again with an alkaline solution of an anti-rust agent such as borax, soda, nitrite, phosphate or sodium hydroxide solution or mixtures thereof. Drying is necessary because acidic reaction lubricants are sensitive to constant water entry.
- Reactive lubricant disadvantageous.
- the mere drying is associated with rust, which has an adverse effect on the phosphatability of the workpiece by the required density and adhesive strength of the phosphate layer is not guaranteed.
- the pre-drying rinsing with a solution of alkaline rust inhibitor is associated with a considerable introduction of salt into the acidic reaction lubricant, which on the one hand leads to considerable sludge formation and on the other hand reduces the functionality due to the constant introduction of alkaline substances.
- the layer formation is hindered because acidic reaction lubricants only stain the alkaline workpiece surface unevenly.
- the object of the invention is to provide a method for preparing phosphatable workpieces for non-cutting cold forming using acidic reaction lubricants, which does not have the aforementioned disadvantages, in which the workpieces are introduced into the process step of treatment with the acidic reaction lubricant in a rust-free state, and in which the acidic reaction lubricant can be acted upon properly without adversely affecting it.
- the object is achieved by designing the method of the type mentioned at the outset in accordance with the invention in such a way that the workpieces are rinsed with a solution which contains lactic acid and has a pH below 3 before drying.
- Workpieces that can be phosphated for cold forming consist in particular of steel in the form of wire, tube, profiles, round blanks, etc., which are formed by drawing, cold extrusion, rolling, etc.
- the pH value can be set below 3 using lactic acid alone. For cost reasons, however, it is advisable to use phosphoric acid and / or sulfuric acid to adjust the pH. According to an advantageous embodiment of the invention, phosphoric acid is preferred since the finally applied reaction lubricant contains phosphate ions and consequently the phosphate ions derived from the phosphoric acid are unavoidably introduced with the flushing solution.
- a preferred embodiment of the invention provides for rinsing the workpieces with a solution which contains 1 to 50 g / 1 lactic acid.
- Lactic acid concentration outside the preferred range leads to usable lactate layers, lactic acid concentrations in the preferred range result in lactate layers which are particularly advantageous with regard to corrosion protection and activation of the lubricating layer formation.
- Another expedient embodiment of the invention is to rinse the workpieces with a solution which contains lactic acid and phosphoric acid in a weight ratio of 1: 9 to 9: 1. This configuration is particularly advantageous taking into account both the layer quality and the cost situation.
- the solution containing lactic acid can be rinsed at a solution temperature of 20 to 90 ° C. According to a further advantageous embodiment of the invention, it is advisable to rinse the workpieces with a solution at a temperature of 60 to 80 ° C.
- the invention is illustrated by the following example.
- Tubes of steel quality St34 / 2 bright annealed under protective gas at approx. 920 ° C were initially contained in a pickling solution of 50 ° C
- the tubes were then allowed to air dry and treated with the residual moisture adhering in a conventional manner with an acidic reaction lubricant containing phosphate ions and formed by tube drawing.
Landscapes
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Lubricants (AREA)
- Metal Extraction Processes (AREA)
- Polarising Elements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99969750A EP1135543B1 (de) | 1998-09-28 | 1999-09-21 | Vorbereitung von werkstücken für die kaltumformung |
US09/787,043 US6482273B1 (en) | 1998-09-28 | 1999-09-21 | Preparation of workpieces for cold forming |
AT99969750T ATE218629T1 (de) | 1998-09-28 | 1999-09-21 | Vorbereitung von werkstücken für die kaltumformung |
DE59901680T DE59901680D1 (de) | 1998-09-28 | 1999-09-21 | Vorbereitung von werkstücken für die kaltumformung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19844391.9 | 1998-09-28 | ||
DE19844391A DE19844391C2 (de) | 1998-09-28 | 1998-09-28 | Verfahren zur Vorbereitung von Werkstücken für die Kaltumformung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000018983A1 true WO2000018983A1 (de) | 2000-04-06 |
Family
ID=7882486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/006978 WO2000018983A1 (de) | 1998-09-28 | 1999-09-21 | Vorbereitung von werkstücken für die kaltumformung |
Country Status (6)
Country | Link |
---|---|
US (1) | US6482273B1 (de) |
EP (1) | EP1135543B1 (de) |
AT (1) | ATE218629T1 (de) |
DE (2) | DE19844391C2 (de) |
ES (1) | ES2178504T3 (de) |
WO (1) | WO2000018983A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI457433B (zh) * | 2008-01-30 | 2014-10-21 | Chemetall Gmbh | 將金屬表面施以一磷酸鹽層然後施以一潤滑劑層的方法 |
TWI457432B (zh) * | 2008-01-30 | 2014-10-21 | Chemetall Gmbh | 將金屬表面施以一含蠟的潤滑劑組成物的方法 |
TWI457431B (zh) * | 2008-01-30 | 2014-10-21 | Chemetall Gmbh | 將金屬表面施以一種潤滑劑組成物的方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB665993A (en) * | 1947-07-23 | 1952-02-06 | Plasco Ltd | Process and composition for producing a dyeable corrosion-resistant coating on zinc and zinc alloys |
GB731882A (en) * | 1952-08-06 | 1955-06-15 | American Chem Paint Co | Improvements in the phosphate coating of metal |
US3795548A (en) * | 1972-01-10 | 1974-03-05 | Oxy Metal Finishing Corp | Procedure for surface treatment of iron and steel |
WO1996009422A1 (de) * | 1994-09-23 | 1996-03-28 | Henkel Kommanditgesellschaft Auf Aktien | Phosphatierverfahren ohne nachspülung |
US5624480A (en) * | 1993-04-07 | 1997-04-29 | Henkel Corporation | Composition and process for substitutionally plating zinciferous surfaces |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2103086C3 (de) * | 1971-01-23 | 1979-11-15 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur Oberflächenbehandlung von Werkstücken aus Eisen und Stahl |
JPH0696773B2 (ja) * | 1989-06-15 | 1994-11-30 | 日本ペイント株式会社 | 金属表面のリン酸亜鉛皮膜形成方法 |
-
1998
- 1998-09-28 DE DE19844391A patent/DE19844391C2/de not_active Withdrawn - After Issue
-
1999
- 1999-09-21 AT AT99969750T patent/ATE218629T1/de not_active IP Right Cessation
- 1999-09-21 DE DE59901680T patent/DE59901680D1/de not_active Expired - Fee Related
- 1999-09-21 EP EP99969750A patent/EP1135543B1/de not_active Expired - Lifetime
- 1999-09-21 WO PCT/EP1999/006978 patent/WO2000018983A1/de active IP Right Grant
- 1999-09-21 ES ES99969750T patent/ES2178504T3/es not_active Expired - Lifetime
- 1999-09-21 US US09/787,043 patent/US6482273B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB665993A (en) * | 1947-07-23 | 1952-02-06 | Plasco Ltd | Process and composition for producing a dyeable corrosion-resistant coating on zinc and zinc alloys |
GB731882A (en) * | 1952-08-06 | 1955-06-15 | American Chem Paint Co | Improvements in the phosphate coating of metal |
US3795548A (en) * | 1972-01-10 | 1974-03-05 | Oxy Metal Finishing Corp | Procedure for surface treatment of iron and steel |
US5624480A (en) * | 1993-04-07 | 1997-04-29 | Henkel Corporation | Composition and process for substitutionally plating zinciferous surfaces |
WO1996009422A1 (de) * | 1994-09-23 | 1996-03-28 | Henkel Kommanditgesellschaft Auf Aktien | Phosphatierverfahren ohne nachspülung |
Also Published As
Publication number | Publication date |
---|---|
US6482273B1 (en) | 2002-11-19 |
EP1135543B1 (de) | 2002-06-05 |
DE19844391A1 (de) | 2000-04-13 |
ES2178504T3 (es) | 2002-12-16 |
DE59901680D1 (de) | 2002-07-11 |
EP1135543A1 (de) | 2001-09-26 |
DE19844391C2 (de) | 2003-01-09 |
ATE218629T1 (de) | 2002-06-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE972727C (de) | Verfahren zur Behandlung von Metalloberflaechen vor dem Aufbringen von UEberzuegen | |
EP0064790A1 (de) | Verfahren zur Phosphatierung von Metallen sowie dessen Anwendung zur Vorbehandlung für die Elektrotauchlackierung | |
DE1184588B (de) | Verfahren und Loesung zum Aufbringen von festhaftenden UEberzuegen aus Polyvinylphosphonsaeure auf Metallteilen | |
WO2000068458A1 (de) | Vorbehandlung von aluminiumoberflächen durch chromfreie lösungen | |
EP0045110A1 (de) | Verfahren zur Herstellung von Phosphatüberzügen auf Eisen- und Stahloberflächen sowie dessen Anwendung | |
DE2711429A1 (de) | Verfahren zur reinigung von zinn- oberflaechen | |
EP0324395B1 (de) | Verfahren zur Phosphatierung von Metalloberflächen | |
EP0031103B1 (de) | Verfahren zur Vorbehandlung von Metalloberflächen vor dem Phosphatieren | |
DE4228470A1 (de) | Verfahren zur Phospatierung von einseitig verzinktem Stahlband | |
DE2538347A1 (de) | Zinkphosphatloesungen zur ausbildung von zinkphosphatschichten auf metallen | |
DE3875459T2 (de) | Verfahren zum phosphatieren von metalloberflaechen. | |
DE19933189A1 (de) | Verfahren zur korrosionsschützenden Behandlung oder Nachbehandlung von Metalloberflächen | |
EP1135543B1 (de) | Vorbereitung von werkstücken für die kaltumformung | |
EP0039093A1 (de) | Verfahren zur Phosphatierung von Metalloberflächen sowie dessen Anwendung | |
DE4243214A1 (de) | Verfahren zur Erzeugung von Phosphatüberzügen | |
EP0059994B1 (de) | Verfahren zur Herstellung von Phosphatüberzügen auf Metalloberflächen | |
DE19639597C2 (de) | Verfahren zur Phosphatierung von laufenden Bändern aus kalt- oder warmgewalztem Stahl in schnellaufenden Bandanlagen | |
DE2540685C2 (de) | Verfahren zur Herstellung von Phosphatüberzügen | |
DE1188898B (de) | Verfahren zur Phosphatierung von Eisen und Stahl | |
DE974503C (de) | Verfahren zur Herstellung von UEberzuegen auf Metallen | |
DE2207047A1 (de) | Verfahren zur vorbereitung von stahlwerkstuecken fuer die spanlose kaltverformung | |
DE976692C (de) | Verfahren zum Aufbringen von Oxalatueberzuegen auf Metallen | |
WO2005033365A1 (de) | Verfahren zum entrosten von formteilen | |
DE1796218B1 (de) | Verfahren zur phosphatierung von metallen | |
DE976621C (de) | Verfahren zum Behandeln von Metalloberflaechen vor dem Aufbringen von UEberzuegen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): IN US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09787043 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1999969750 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1999969750 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999969750 Country of ref document: EP |