EP0324395B1 - Verfahren zur Phosphatierung von Metalloberflächen - Google Patents
Verfahren zur Phosphatierung von Metalloberflächen Download PDFInfo
- Publication number
- EP0324395B1 EP0324395B1 EP89100228A EP89100228A EP0324395B1 EP 0324395 B1 EP0324395 B1 EP 0324395B1 EP 89100228 A EP89100228 A EP 89100228A EP 89100228 A EP89100228 A EP 89100228A EP 0324395 B1 EP0324395 B1 EP 0324395B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ions
- metal surfaces
- zinc
- brought
- solutions
- 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.)
- Expired - Lifetime
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
- C23C22/05—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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
- C23C22/22—Orthophosphates containing alkaline earth metal cations
-
- 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
- C23C22/34—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 fluorides or complex fluorides
- C23C22/36—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 fluorides or complex fluorides containing also phosphates
- C23C22/367—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 fluorides or complex fluorides containing also phosphates containing alkaline earth metal cations
Definitions
- the present invention relates to a method for phosphating metal surfaces, in particular the zinc-calcium phosphating of surfaces made of iron, steel, zinc and / or aluminum as a pretreatment for cold forming.
- Zinc phosphating baths can contain, for example, monozinc phosphate, free phosphoric acid, zinc nitrate and oxidizing agents as main components.
- the pH of such solutions is usually in the range between 2.8 and 3.4.
- the process sequence consists of two reactions, the pickling reaction and the formation of a zinc phosphate layer on the surface to be phosphated.
- the alkali phosphating processes clean and degrease the metal surface and form a corrosion-protective cover layer, which mainly consists of iron phosphate.
- the layer formation is initiated by a pickling reaction in which a small amount of the base metal is removed.
- the majority of the dissolved surface material reacts with the phosphate ion of the solution to form poorly soluble phosphates, which deposit as a firmly adhering coating on the surface.
- the layer-forming cation originates from the base metal itself.
- iron phosphate layers with a low layer weight of around 0.2 to 0.4 g / m2 and iron phosphate layers with higher basis weights from 0.6 to 1.2 g / m2.
- the thin phosphate layers are particularly suitable for painting; they ensure excellent paint adhesion, offer good protection against rust, electrical insulation, reduction of sliding resistance and facilitate cold forming.
- phosphate layers with a layer weight of up to 40 g / m2 are usually deposited.
- the metal soaps are known to be produced.
- Aluminum, calcium, lithium, zinc and magnesium stearates are water-repellent and, as solid lubricants in wire drawing, result in lower coefficients of friction at higher surface pressures than conventional alkali soaps.
- Metal soaps have the advantage over alkali soaps that they hardly absorb moisture from the air, remain unchanged in their lubricating effect due to their high compressive strength and allow higher overall cross-sectional decreases, while with alkaline soaps the lubricating effect can decrease significantly due to moisture absorption.
- EP-A-0 045 110 describes a process for the production of phosphate coatings on iron or steel surfaces by immersion or flooding with a rather aqueous acidic zinc phosphate solution, the surfaces being brought into contact with a solution which, in addition to Zn2+, PO43 ⁇ , NO3 ⁇ or a similarly acting iron (II) non-oxidizing accelerator, in which the weight ratio Zn: PO4 is greater than 0.8, the ratio of total acid to free acid is at least 5 and in which, by suitable measurement of ClO3 ⁇ or the like acting iron (II) to iron (III) oxidizing accelerator sets an iron (II) content of 0.05 to 1 wt .-%.
- the phosphating solutions described here contain 0.3 to 2.2 wt .-% Zn, 0.3 to 2.2 wt .-% PO4 and 0.75 to 5.5 wt .-% NO3, the weight ratio of Zn to PO4 is in the range of (0.8 to 4): 1 and the ratio of total acid to free acid is in the range of (5 to 30): 1.
- such phosphating solutions can contain calcium in amounts of 0.01 to 0.88% by weight, the weight ratio of Zn to Ca being 1.5 to 4.
- Other additives can be: copper, cobalt, nickel and simple or complex fluoride.
- nitroguanidine for example, is suitable as the iron (II) non-oxidizing accelerator.
- the metal surfaces to be phosphated can be subjected to an activation treatment beforehand.
- the phosphating process described is particularly suitable as a preparation for non-cutting cold forming.
- the object of the present invention was to provide an improved method for phosphating metal surfaces made of iron, steel, zinc and their alloys and aluminum as a pretreatment for cold forming.
- the objects of the present invention are achieved by the improved phosphating process based on zinc-calcium-phosphate layers.
- the phosphating solution with which the surfaces to be coated are brought into contact can Zn2+ and Ca2+ ions in a weight ratio of 1: 1 contain.
- preferred embodiments of the present phosphating solution contain further cations of transition metal ions in addition to the above Ca2 und and Zn2+ cations.
- Ni2+ ions are particularly preferred at this point.
- the phosphating solutions contain Ni2+ ions, an amount of 0.01 to 10 g / l of Ni2+ ions is preferred.
- phosphating solutions according to the invention can contain further additional anions.
- simple and / or complex fluorides can be used as further anions which may be used. These can be used in the phosphating solutions in particular in amounts of 0.01 to 10 g / l.
- a preferred embodiment of the present invention is to set the temperature range in the range from 50 to 70 ° C. and to bring the metal surfaces into contact with the phosphating solutions.
- phosphating solutions according to the invention can contain 0.1 to 2.0 g of organic nitro compounds.
- Organic nitro compounds in the sense of the present invention are selected from m-nitrobenzenesulfonates and / or nitroguanidine.
- the organic nitro compounds can also be present in amounts of 0.1 to 2.0 g / l in addition to 10 to 100 g / l NO3 ⁇ ions in the phosphating solutions.
- the process for phosphating metal surfaces made of iron, steel, zinc and their alloys as well as aluminum, zinc-calcium-phosphate layers (Scholzit) with a basis weight of 3 to 9 g / m2 is produced.
- the zinc-calcium-phosphate layers can be created on the metal surfaces by dipping, spraying and flooding as well as by combined processes.
- the surfaces to be phosphated are degreased by the processes known in the prior art.
- Oil, grease and lubricant residues or grinding dust from previous manufacturing processes can be removed by organic solvents or aqueous cleaners.
- the chlorinated hydrocarbons are the most frequently used organic solvents because they dissolve oils and fats excellently and are not flammable. Solids and inorganic contaminants, however, are removed only inadequately. Water-based cleaners have a very high cleaning ability.
- the advantage of the present invention is that zinc calcium phosphate layers are suitable for producing low layer weights on the order of 3 to 9 g / m 2 on wire.
- the zinc-calcium-phosphate layers formed mostly contain the mineral scholzite.
- a mixed soap of zinc-calcium stearate is formed in addition to zinc stearate and calcium stearate.
- zinc calcium stearate has the advantage that the durability of the drawing dies is increased many times over. Pulling tests in the technical center also showed that the wire surfaces, in particular during a subsequent polishing pull, achieve a substantially brighter and more uniform appearance than can be achieved with conventional methods operated on the accelerator side.
- Another product advantage is the fact that the new zinc-calcium phosphating process for cold working works in a temperature range of preferably 50 to 70 ° C.
- the sludge behavior in this process can be classified as particularly favorable, since even after a bath load of 1.5 m2 steel surface per liter of bath solution, only minimal quantities in the order of a few milliliters of bath sludge are produced.
- Another advantage of the present invention is that the Sales with drawing soap (sodium stearate) resulting zinc-calcium stearate mixed soaps allow a longer service life of the drawing dies due to the improved properties.
- a phosphating solution was prepared that 10.3 g of 1 ⁇ 1 Ca2+ ions 14.0 g of 1 ⁇ 1 Zn2+ ions 27.8 g of 1 ⁇ 1 PO43 ⁇ ions 46.5 g of 1 ⁇ 1 NO3 ⁇ ions contained.
- the phosphating solution had the following characteristics: pH: approx.2.6 Acid ratio: approx. 1:21 (free acid to total acid)
- Steel wires which had previously been immersed in an alkaline cleaning solution at 80 ° C. for 10 minutes by immersion treatment and rinsed with water, were immersed in the aforementioned phosphating solution at 50 ° C. for 7 minutes. It was then rinsed with water and a reactive soap was applied. Then the wires were drawn over drawing dies. The result was a very bright and shiny surface.
- the pH was 2.5 and the ratio of free acid to total acid was 1: 17.6.
- the wire coated in this way could easily be reduced to the desired size using several drawing dies connected in series.
- the result was a bright and shiny surface.
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)
- Laminated Bodies (AREA)
- Manufacture And Refinement Of Metals (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89100228T ATE83509T1 (de) | 1988-01-14 | 1989-01-07 | Verfahren zur phosphatierung von metalloberflaechen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3800835A DE3800835A1 (de) | 1988-01-14 | 1988-01-14 | Verfahren zur phosphatierung von metalloberflaechen |
DE3800835 | 1988-01-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0324395A1 EP0324395A1 (de) | 1989-07-19 |
EP0324395B1 true EP0324395B1 (de) | 1992-12-16 |
Family
ID=6345237
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89100228A Expired - Lifetime EP0324395B1 (de) | 1988-01-14 | 1989-01-07 | Verfahren zur Phosphatierung von Metalloberflächen |
Country Status (9)
Country | Link |
---|---|
US (1) | US4944813A (pt) |
EP (1) | EP0324395B1 (pt) |
JP (1) | JPH01219172A (pt) |
AT (1) | ATE83509T1 (pt) |
AU (1) | AU604395B2 (pt) |
BR (1) | BR8900148A (pt) |
DE (2) | DE3800835A1 (pt) |
MX (1) | MX169762B (pt) |
TR (1) | TR26644A (pt) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5189720A (en) * | 1989-04-03 | 1993-02-23 | Sumitomo Electric Industries, Ltd. | Method for manufacturing steel wire material for reinforcing optical fiber |
JPH03215684A (ja) * | 1990-01-18 | 1991-09-20 | Nippon Parkerizing Co Ltd | アルミニウムの潤滑皮膜処理法 |
DE4029985A1 (de) * | 1990-09-21 | 1992-03-26 | Bohnacker Tegometall | Verfahren zum pulverbeschichten von metalloberflaechen |
DE19634685A1 (de) * | 1996-08-28 | 1998-03-05 | Metallgesellschaft Ag | Wässrige Lösung und Verfahren zur Phosphatierung metallischer Oberflächen |
US5968240A (en) * | 1997-08-19 | 1999-10-19 | Sermatech International Inc. | Phosphate bonding composition |
DE19808440C2 (de) * | 1998-02-27 | 2000-08-24 | Metallgesellschaft Ag | Wässrige Lösung und Verfahren zur Phosphatierung metallischer Oberflächen sowie eine Verwendung der Lösung und des Verfahrens |
JP2000119862A (ja) * | 1998-10-07 | 2000-04-25 | Nippon Parkerizing Co Ltd | 鉄鋼の冷間塑性加工用潤滑処理方法 |
US6902766B1 (en) | 2000-07-27 | 2005-06-07 | Lord Corporation | Two-part aqueous metal protection treatment |
JP4233565B2 (ja) | 2002-07-10 | 2009-03-04 | ヒェメタル ゲゼルシャフト ミット ベシュレンクテル ハフツング | 金属表面を被覆する方法 |
DE10320313B4 (de) * | 2003-05-06 | 2005-08-11 | Chemetall Gmbh | Verfahren zum Beschichten von metallischen Körpern mit einer Phosphatierungslösung, Phosphatierungslösung und die Verwendung des beschichteten Gegenstandes |
DE10323305B4 (de) * | 2003-05-23 | 2006-03-30 | Chemetall Gmbh | Verfahren zur Beschichtung von metallischen Oberflächen mit einer Wasserstoffperoxid enthaltenden Phosphatierungslösung, Phosphatierlösung und Verwendung der behandelten Gegenstände |
DE102005023023B4 (de) * | 2005-05-19 | 2017-02-09 | Chemetall Gmbh | Verfahren zur Vorbereitung von metallischen Werkstücken zum Kaltumformen, mit dem Verfahren beschichtete Werkstücke und ihre Verwendung |
JP5153063B2 (ja) * | 2005-07-15 | 2013-02-27 | 日本発條株式会社 | 鋼材の表面処理方法 |
US20070051156A1 (en) * | 2005-08-31 | 2007-03-08 | Aisin Aw Co., Ltd. | Manufacturing method for an annular member and a pronged annular member |
WO2021185449A1 (de) * | 2020-03-19 | 2021-09-23 | Thyssenkrupp Steel Europe Ag | Verfahren zum erzeugen einer phosphatierschicht und nickelfreie phosphatierlösung |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0045110A1 (de) * | 1980-07-25 | 1982-02-03 | Metallgesellschaft Ag | Verfahren zur Herstellung von Phosphatüberzügen auf Eisen- und Stahloberflächen sowie dessen Anwendung |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3090709A (en) * | 1953-08-10 | 1963-05-21 | Lubrizol Corp | Phosphate coating of metals |
US3161549A (en) * | 1955-04-08 | 1964-12-15 | Lubrizol Corp | Solution for forming zinc phosphate coatings on metallic surfaces |
US3104177A (en) * | 1961-12-12 | 1963-09-17 | Lubrizol Corp | Phosphating process |
DE2540685C2 (de) * | 1975-09-12 | 1985-06-27 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur Herstellung von Phosphatüberzügen |
JPS5558376A (en) * | 1978-10-21 | 1980-05-01 | Nippon Paint Co Ltd | Calsium modified zinc phosphate film treating solution |
DE3407513A1 (de) * | 1984-03-01 | 1985-09-05 | Gerhard Collardin GmbH, 5000 Köln | Verfahren zur zink-calcium-phosphatierung von metalloberflaechen bei niedriger behandlungstemperatur |
JPS60204890A (ja) * | 1984-03-28 | 1985-10-16 | Nippon Parkerizing Co Ltd | 鉄鋼線材のリン酸塩処理方法 |
DE3571562D1 (en) * | 1984-05-21 | 1989-08-24 | Sumitomo Metal Ind | Method for continuous drawing of wire rod |
CA1257527A (en) * | 1984-12-20 | 1989-07-18 | Thomas W. Tull | Cold deformation process employing improved lubrication coating |
-
1988
- 1988-01-14 DE DE3800835A patent/DE3800835A1/de not_active Withdrawn
-
1989
- 1989-01-07 DE DE8989100228T patent/DE58902980D1/de not_active Expired - Fee Related
- 1989-01-07 EP EP89100228A patent/EP0324395B1/de not_active Expired - Lifetime
- 1989-01-07 AT AT89100228T patent/ATE83509T1/de not_active IP Right Cessation
- 1989-01-12 TR TR89/0045A patent/TR26644A/xx unknown
- 1989-01-13 AU AU28508/89A patent/AU604395B2/en not_active Ceased
- 1989-01-13 BR BR898900148A patent/BR8900148A/pt unknown
- 1989-01-13 US US07/297,155 patent/US4944813A/en not_active Expired - Fee Related
- 1989-01-13 MX MX014531A patent/MX169762B/es unknown
- 1989-01-17 JP JP1009621A patent/JPH01219172A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0045110A1 (de) * | 1980-07-25 | 1982-02-03 | Metallgesellschaft Ag | Verfahren zur Herstellung von Phosphatüberzügen auf Eisen- und Stahloberflächen sowie dessen Anwendung |
Also Published As
Publication number | Publication date |
---|---|
EP0324395A1 (de) | 1989-07-19 |
JPH01219172A (ja) | 1989-09-01 |
TR26644A (tr) | 1994-05-25 |
AU604395B2 (en) | 1990-12-13 |
AU2850889A (en) | 1989-07-20 |
US4944813A (en) | 1990-07-31 |
MX169762B (es) | 1993-07-23 |
DE3800835A1 (de) | 1989-07-27 |
BR8900148A (pt) | 1989-09-12 |
DE58902980D1 (de) | 1993-01-28 |
ATE83509T1 (de) | 1993-01-15 |
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