EP1290242A2 - Verfahren zum behandeln bzw. vorbehandeln von bauteilen mit aluminium-oberflächen - Google Patents
Verfahren zum behandeln bzw. vorbehandeln von bauteilen mit aluminium-oberflächenInfo
- Publication number
- EP1290242A2 EP1290242A2 EP01953946A EP01953946A EP1290242A2 EP 1290242 A2 EP1290242 A2 EP 1290242A2 EP 01953946 A EP01953946 A EP 01953946A EP 01953946 A EP01953946 A EP 01953946A EP 1290242 A2 EP1290242 A2 EP 1290242A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- phosphating
- fluoride
- bath
- aluminum
- solution
- 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.)
- Granted
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
- C23C22/73—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
-
- 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
-
- 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
- C23C22/364—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 also manganese cations
- C23C22/365—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 also manganese cations containing also zinc and nickel cations
Definitions
- the invention relates to a method for treating or pretreating parts with aluminum surfaces.
- Phosphating processes for aluminum and aluminum alloys are generally known.
- fluoride-modified phosphating processes with at least 150 mg / l free fluoride have proven particularly useful. These processes are particularly important in the automotive industry and are used above all when a mix of substrates made of different metals or alloys is passed through the plants.
- DE-A1-197 35 314 describes a method for pretreating components with aluminum surfaces - possibly in the presence of magnesium, steel or / and zinc surfaces - in a phosphating system in which the components are degreased with a degreasing solution Treatment with a fluoride-containing phosphating solution is phosphated and then passivated by treatment with a passivation solution.
- the proportion of the aluminum or / and the magnesium surface in the total surface of the components to be treated is at least 10%.
- the fluoride of the phosphating solution should only be added as complex-bound fluoride and the content of the free fluoride ions formed therefrom in the phosphating solution should be used for phosphating the steel and / or zinc surfaces without phosphating the Aluminum and / or magnesium surfaces are kept at less than 100 mg / l.
- the passivation solution should be composed such that it passivates the phosphated steel or / and zinc surfaces and forms a conversion layer on the aluminum or / and magnesium surfaces.
- this method has the disadvantage that it can only be used in the case of a comparatively small area of aluminum surfaces, usually only up to approximately 20% by area of all surfaces to be treated on the mix of substrates.
- cryolite and / or related precipitation products continue to be formed in the pretreatment bath and that the layer formation reactions, in particular on iron and steel surfaces, are impaired with an increased aluminum content of the phosphating solution, so that the entire mix of substrates from different no longer Metal and alloy surfaces can be coated equally well in the bathroom.
- the object of the invention is to overcome the disadvantages of the prior art and, in particular, to propose a method for phosphating aluminum and aluminum-containing alloys which, even with increased proportions of aluminum-containing surfaces, of the components to be treated or pretreated is good Conversion layer which can be applied on an industrial scale and / or a corresponding passivation layer on the surfaces of aluminum or aluminum-containing alloys - if appropriate in a mix of substrates made of different metals or alloys - may be applied.
- the object is achieved by a method for treating or pretreating parts, profiles, strips or wires with surfaces of aluminum or aluminum-containing alloys - if appropriate in the presence of surfaces of further metals or alloys - with a fluoride and phosphate-containing alloy acidic aqueous solution, which is characterized in that the fluoride is at least partially present as free fluoride in the solution and that the contents in the bath of the phosphating solution
- the aluminum content in the phosphating solution is preferably kept in a range from 6 to 120 mg / l, particularly preferably in a range from 10 to 80 mg / l, very particularly preferably in a range from 20 to 50 mg / l.
- the aluminum content in the phosphating solution is preferably kept at values ⁇ 80 mg / l, particularly preferably ⁇ 60 mg / l, very particularly preferably ⁇ 30 mg / l.
- the process according to the invention is also characterized in that in the precipitation tank or in the separate zone of the bath, by adding alkali ions, fluoride complexes and / or fluoride ions, aluminum is precipitated in the phosphating solution, in particular with Na or K Ions or with at least one easily dissociating fluoride such as NaF, NH 4 F, NaHF 2 or KF.
- the AIF x complex can already be pre-complexed. It is advantageous to control the process according to the invention in such a way that, despite the addition of F, the free fluoride content in the bath is not increased.
- the levels of alkali Ions in the phosphating bath are preferably 1 to 20 g / l and are preferably also kept in this range, in particular 3 to 10 g / l.
- the alkali ion content can also be far above the concentration of 20 g / l, for example 30 g / l. With such a high alkali concentration, instability of the bath can occur in many cases. In the case of a mixture of different alkali ions next to one another, a dominant content of sodium and / or potassium ions is preferred.
- the concentration of free fluoride in the phosphating solution in the phosphating bath is advantageously 8 to 80 mg / l and in particular 10 to 50 mg / l or in the precipitation tank or in the separate zone of the bath tank 5 to 500 mg / l of free fluoride, in particular 20 to 200 mg / l, particularly preferably 30 to 120 mg / l. It is therefore also preferred to keep these contents in these concentrations.
- a closed phosphate layer forms from the phosphating bath on the metallic surfaces if the content of cations co-precipitated with the phosphate such as Zn, Cu, Ni, Fe, Mn etc. is not is very low.
- the formation of a phosphate layer on the aluminum surfaces is not absolutely necessary for reasons of corrosion protection.
- a free fluoride content above 120 mg / l will usually not be selected, although above this value it can also be worked as intended, because it also causes a higher chemical consumption and a larger amount of precipitated sludge from cryolite and / or related precipitation products , It is also preferred to set and maintain a concentration difference of free fluoride between the phosphating bath and the precipitation container or separate zone in the bath of 30 to 60 mg / l.
- the method according to the invention will be used in such a way that the residence time of the phosphating solution in the precipitation tank or in the separate precipitation zone is up to 1 hour, often up to 0.5 hour.
- the volume flow from the bath to the precipitation tank and back is set in accordance with the selected volumes or partial volumes and the desired aluminum content in the phosphating bath.
- part in the sense of this application encompasses all types and shapes of sheet metal, strip and profile sections, shaped bodies, semi-finished products, components, assemblies, etc.
- the parts, profiles, strips or / and wires to be treated or pretreated are cleaned, rinsed and, if necessary, separated from the rinsing and cleaning stages with an activation solution, e.g. based on colloidally distributed titanium phosphate.
- an activation solution e.g. based on colloidally distributed titanium phosphate.
- the treated or pretreated parts, sections, strips and / or wires can after pickling / phosphatizing rinsed and / or passivated, in particular 'of a chromate-containing with a passivating solution on the basis of compound, titanium fluoride, zirconium fluoride, soluble rare-earth compound - in particular Cerium-containing compound, self-organizing molecules, eg based on phosphonate, based on silane, solvent-soluble and / or dispersible polymer.
- the treated or pretreated or / and passivated parts, profiles, strips or / and wires can be dried after pickling / phosphating or after passivation. In some cases, such as in the immediately subsequent electrocoating, drying is not necessary.
- the aluminum can be precipitated under normal pressure and at a temperature in the range from room temperature to 70 ° C., in particular at a temperature in the range from 40 to 60 ° C.
- the conversion or passivation layer can be formed under normal pressure and at a temperature from room temperature to 70 ° C., preferably at 35 to 60 ° C.
- the pH is usually in the range from 2 to 4.
- the pH of phosphating baths is always in the range around pH 3. At values of pH> 4.0, the bath is usually unstable, while at values of pH ⁇ 2.0, the bath is so stable that usually no good layer formation occurs because the pH value shift on the freshly pickled metallic surface does not sufficient to separate the conversion layer.
- the treated or pretreated or / and passivated parts, profiles, strips or / and wires can be coated with a lacquer, with a different organic coating, with a film or / and with an adhesive layer, if necessary printed and if necessary reshaped, wherein the metal parts coated in this way can additionally be glued together, welded together and / or otherwise connected to one another.
- FIG. 1 shows a flow diagram which schematically represents one of several principles of separate aluminum deposition.
- the phosphating process according to the invention has the advantage over previously described and practiced processes that the sludge containing cryolite and / or related precipitation products is largely obtained in a separate precipitation zone or in a separate precipitation container and can be disposed of from there.
- the method according to the invention it is possible to treat or pretreat different metallic substrates in a mix without impairing the layer formation, e.g. comes on steel. Due to the reduced free fluoride content in the phosphating solution, there is also less pickling attack on aluminum-containing surfaces, which also results in a correspondingly lower sludge formation.
- the procedure was as follows: 5 ml of the sample filtered using a membrane filter were placed in a strongly hydrochloric demineralized water solution and made up to 50 ml with demineralized water. This solution was examined for its aluminum content by means of ICP.
- This entry corresponds to approx. 40 bodies per hour with 50% aluminum surface area and a pickling attack of approx. 1 g / m 2 during the contact time.
- AI (ppm) (((200m 3 - partial flow) • conc. AI in ppm after 1 h + (partial flow • rest AI in ppm after precipitation)) / 200) + AI in ppm from entry via pickling attack / h.
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)
- ing And Chemical Polishing (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10026850 | 2000-05-31 | ||
| DE10026850A DE10026850A1 (de) | 2000-05-31 | 2000-05-31 | Verfahren zum Behandeln bzw. Vorbehandeln von Bauteilen mit Aluminium-Oberflächen |
| PCT/EP2001/005756 WO2001092597A2 (de) | 2000-05-31 | 2001-05-19 | Verfahren zum behandeln bzw. vorbehandeln von bauteilen mit aluminium-oberflächen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1290242A2 true EP1290242A2 (de) | 2003-03-12 |
| EP1290242B1 EP1290242B1 (de) | 2004-02-25 |
Family
ID=7644139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01953946A Expired - Lifetime EP1290242B1 (de) | 2000-05-31 | 2001-05-19 | Verfahren zum behandeln bzw. vorbehandeln von bauteilen mit aluminium-oberflächen |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US20030150527A1 (de) |
| EP (1) | EP1290242B1 (de) |
| JP (1) | JP2003535220A (de) |
| AT (1) | ATE260349T1 (de) |
| AU (1) | AU7633701A (de) |
| DE (2) | DE10026850A1 (de) |
| ES (1) | ES2215920T3 (de) |
| WO (1) | WO2001092597A2 (de) |
| ZA (1) | ZA200209670B (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MXPA03006677A (es) | 2001-02-16 | 2003-10-24 | Henkel Kgaa | Proceso para tratar articulos de metales multiples. |
| US6793738B2 (en) * | 2002-03-28 | 2004-09-21 | General Electric Company | Method for processing acid treatment solution, solution processed thereby, and method for treating articles therewith |
| WO2004007799A2 (de) | 2002-07-10 | 2004-01-22 | Chemetall Gmbh | Verfahren zur beschichtung von metallischen oberflächen |
| DE102010030697A1 (de) | 2010-06-30 | 2012-01-05 | Henkel Ag & Co. Kgaa | Verfahren zur selektiven Phosphatierung einer Verbundmetallkonstruktion |
| CN102094195B (zh) * | 2011-01-14 | 2012-07-18 | 中国科学院宁波材料技术与工程研究所 | 一种金属材料表面的磷化处理方法 |
| EP2915903B1 (de) * | 2014-03-05 | 2018-02-21 | The Boeing Company | Chromfreie Umwandlungsbeschichtung |
| ES2906198T3 (es) * | 2017-09-14 | 2022-04-13 | Chemetall Gmbh | Método para pretratar materiales de aluminio, en particular ruedas de aluminio |
| US11434573B2 (en) * | 2017-12-12 | 2022-09-06 | Chemetall Gmbh | Boric acid-free composition for removing deposits containing cryolite |
| DE102020116345B3 (de) * | 2020-06-22 | 2021-04-08 | Möller Chemie GmbH & Co. KG | Verfahren zur Regeneration einer erschöpften, Schwefelsäure enthaltenden Behandlungsflüssigkeit aus der Aluminiumveredelung |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5200000A (en) * | 1989-01-31 | 1993-04-06 | Nihon Parkerizing Co., Ltd. | Phosphate treatment solution for composite structures and method for treatment |
| KR100197145B1 (ko) * | 1989-12-19 | 1999-06-15 | 후지이 히로시 | 금속표면의 인산아연 처리방법 |
| JPH07100870B2 (ja) * | 1990-04-24 | 1995-11-01 | 日本ペイント株式会社 | 金属表面のリン酸亜鉛皮膜処理方法 |
| JP2794013B2 (ja) * | 1990-10-24 | 1998-09-03 | 日本パーカライジング株式会社 | 鉄―アルミニウム系金属板金構成体用リン酸塩化成処理液 |
| JPH07173643A (ja) * | 1993-12-21 | 1995-07-11 | Mazda Motor Corp | 金属表面の燐酸塩処理方法及び処理液 |
-
2000
- 2000-05-31 DE DE10026850A patent/DE10026850A1/de not_active Withdrawn
-
2001
- 2001-05-19 EP EP01953946A patent/EP1290242B1/de not_active Expired - Lifetime
- 2001-05-19 DE DE50101560T patent/DE50101560D1/de not_active Expired - Fee Related
- 2001-05-19 AU AU76337/01A patent/AU7633701A/en not_active Abandoned
- 2001-05-19 JP JP2002500786A patent/JP2003535220A/ja active Pending
- 2001-05-19 US US10/258,893 patent/US20030150527A1/en not_active Abandoned
- 2001-05-19 WO PCT/EP2001/005756 patent/WO2001092597A2/de not_active Ceased
- 2001-05-19 AT AT01953946T patent/ATE260349T1/de not_active IP Right Cessation
- 2001-05-19 ES ES01953946T patent/ES2215920T3/es not_active Expired - Lifetime
-
2002
- 2002-11-28 ZA ZA200209670A patent/ZA200209670B/en unknown
-
2006
- 2006-07-07 US US11/483,111 patent/US20070119520A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0192597A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE260349T1 (de) | 2004-03-15 |
| AU7633701A (en) | 2001-12-11 |
| US20030150527A1 (en) | 2003-08-14 |
| ZA200209670B (en) | 2003-11-28 |
| WO2001092597B1 (de) | 2002-05-23 |
| JP2003535220A (ja) | 2003-11-25 |
| WO2001092597A3 (de) | 2002-04-25 |
| US20070119520A1 (en) | 2007-05-31 |
| DE10026850A1 (de) | 2001-12-06 |
| ES2215920T3 (es) | 2004-10-16 |
| EP1290242B1 (de) | 2004-02-25 |
| WO2001092597A2 (de) | 2001-12-06 |
| DE50101560D1 (de) | 2004-04-01 |
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