EP3545118A1 - Zusammensetzung und verfahren zur chromfreien vorbehandlung von aluminiumoberflächen - Google Patents
Zusammensetzung und verfahren zur chromfreien vorbehandlung von aluminiumoberflächenInfo
- Publication number
- EP3545118A1 EP3545118A1 EP17792018.8A EP17792018A EP3545118A1 EP 3545118 A1 EP3545118 A1 EP 3545118A1 EP 17792018 A EP17792018 A EP 17792018A EP 3545118 A1 EP3545118 A1 EP 3545118A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- range
- compound
- content
- aqueous composition
- calculated
- 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
- C23C22/05—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
- C23C22/40—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 molybdates, tungstates or vanadates
- C23C22/44—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 molybdates, tungstates or vanadates containing also fluorides or complex fluorides
-
- 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
- C23C22/361—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 titanium, zirconium or hafnium compounds
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Definitions
- the present invention relates to a chromium-free composition for the pretreatment of aluminum surfaces, to a corresponding method and to a correspondingly pretreated component or strip.
- composition according to claim 1 a concentrate according to claim 9, a method according to claim 10 and a component or tape according to claim 14.
- the dependent claims are advantageous embodiments of the present invention.
- aqueous means that more than 50% by weight of the solvent contained is water.
- chromium-free composition it is meant that only raw materials containing chromium at most as an impurity in the ppm range are used for their production.
- aluminum surface is to be understood as meaning a surface which consists at least in part of aluminum or an aluminum alloy.
- hexafluorozirconic acid is intended to include not only the hexafluorozirconic acid itself, but also its mono- or di-deprotonated form.
- phosphate should also include pyrophosphate, polyphosphate, and all forms that are mono- or poly-protonated.
- molybdate is intended to include, in addition to molybdate itself, its singly or doubly protonated form.
- organic polymer is also intended to include organic copolymers as well as mixtures of organic polymers and / or copolymers.
- the present invention relates to an aqueous, chromium-free aluminum surface pretreatment composition
- an aqueous, chromium-free aluminum surface pretreatment composition comprising at least one water-soluble phosphorus compound, at least one water-soluble zirconium compound, at least one water-soluble titanium compound and at least one water-soluble molybdenum compound, the phosphorus compound content being in the range from 15 to 50 mg / l (calculated as phosphorus), the content of zirconium compound in the range of 400 to 600 mg / l (calculated as metal), the content of titanium compound in the range of 85 to 400 mg / l (calculated as metal) and the content of molybdenum compound in Range of 40 to 150 mg / l (calculated as metal) is.
- the content of phosphorus compound is preferably in the range of 25 to 40 mg / l (calculated as phosphorus), the content of zirconium compound in the range of 450 to 540 mg / l (calculated as metal), the content of titanium compound in the range of 200 to 400 mg / l (calculated as metal), and the content of molybdenum compound in the range of 60 to 130 mg / l (calculated as metal).
- the content of phosphorus compound is particularly preferably in the range from 30 to 38 mg / l (calculated as phosphorus), the content of zirconium compound in the range 470 to 520 mg / l (calculated as metal), the content of titanium compound in the range from 350 to 380 mg / l (calculated as metal) and the content of molybdenum compound in the range of 80 to 125 mg / l (calculated as metal).
- the ratios of the individual contents of phosphorus compound, zirconium compound, titanium compound and molybdenum compound in the range from (0.04 to 0.40) to (1.4 to 5.8) to 1.0 are preferably (0.10 to 1.4 ), more preferably in the range of (0.06 to 0.25) to (1.4 to 3.5) to 1.0, to (0.15 to 0.9) and most preferably in the range of (0, 08 to 0.12) to (1, 4 to 1, 5) to 1, 0 to (0.20 to 0.40) (normalized to the content of titanium compound).
- the aqueous composition contains free fluoride, wherein the content of free fluoride in the range of 40 to 100 mg / l, preferably in the range of 60 to 80 mg / l, and the total content of fluorine in the range of 1 to 2 g / l , preferably in the range of 1.4 to 1.8 g / l.
- the content of free fluoride is determined potentiometrically by means of a fluoride-sensitive electrode at room temperature, the total content of fluorine by distillation Seel and potentiometric.
- the at least one zirconium compound preferably comprises hexafluorozirconic acid and the at least one titanium compound hexafluorotitanic acid.
- the at least one zirconium compound is particularly preferably hexafluorozirconic acid and the at least one titanium compound is hexafluorotitanic acid.
- the at least one phosphorus compound is preferably phosphate.
- the at least one molybdenum compound is preferably molybdate.
- the at least one phosphorus compound is particularly preferably phosphate and the at least one molybdenum compound is molybdate.
- the at least one zirconium compound is hexafluorozirconic acid, the at least one titanium compound hexafluorotitanic acid, the at least one phosphorus compound phosphate and the at least one molybdenum compound molybdate.
- the aqueous composition has a pH (at room temperature) in the range of 2.0 to 5.0, more preferably in the range of 3.0 to 4.0. Furthermore, the aqueous composition preferably has free acid points in the range of 3.9 to 4.5 and total acid points of not more than 25. In a preferred embodiment, the aqueous composition has a pH (at room temperature) in the range of 3.0 to 4.0, free acid points in the range of 3.9 to 4.5, and total acid points of not more than 25 ,
- aqueous composition 25 ml of the aqueous composition are diluted in a suitable vessel with 100 ml of distilled water and 5 drops of a phenolphthalein solution are added. With 0.1 M sodium hydroxide solution is then changed to the color change to red, i. titrated to pH 8.6. The volume in ml of sodium hydroxide solution consumed in the titration thus gives the total acidity points.
- the aqueous composition preferably contains a total of not more than 1 mg / l, more preferably not more than 0.5 mg / l and most preferably not more than 0.1 mg / l of organic polymer.
- organic polymers in particular of polyacrylic acid, can have an adverse effect on the lacquer adhesion achieved.
- the aqueous composition contains not more than 300 mg / l, more preferably not more than 100 mg / l of aluminum.
- Aluminum is not added in the preparation of the aqueous composition, but passes through the chemical reaction between the treated aluminum surface and treatment solution in the latter.
- the total aqueous composition contains not more than 20 mg / l, more preferably not more than 10 mg / l of As, Ba, Cd, Co, Cu, Mn, Ni, Pb, Sb, Sn, Sr, V and Ce ,
- the present invention also relates to a concentrate from which the aqueous composition according to the invention can be obtained by dilution with water and optionally adjusting the pH with a suitable acid or base.
- the present invention also provides a process for chromium-free pretreatment of aluminum surfaces, in which an optionally cleaned and rinsed surface, which consists at least in part of aluminum or an aluminum alloy, brought into contact with the aqueous composition according to the invention and then optionally rinsed and / or dried becomes.
- an optionally cleaned and rinsed surface which consists at least in part of aluminum or an aluminum alloy, brought into contact with the aqueous composition according to the invention and then optionally rinsed and / or dried becomes.
- said surface is the surface of a component or a strip.
- the surface consists for the most part, particularly preferably exclusively or almost exclusively of aluminum or at least one aluminum alloy.
- Suitable aluminum alloys are, in particular, aluminum-magnesium alloys such as the 5000 series and aluminum-magnesium-silicon alloys such as the 2000 series.
- the contacting of the surface with the composition according to the invention can be carried out by dip application as well as by spray application. Both in the dipping application and in the spray application, the surface is preferably brought into contact with the composition according to the invention for 4 to 10 seconds at 45 to 60 ° C., more preferably for 5 to 7 seconds at 50 to 55 ° C.
- the surface is brought into contact with the aqueous treatment solution in such a way that a phosphorus deposit (calculated as P2O5) in the range of 8 to 17 mg / m 2 , preferably in the range of 10 to 15 mg / m 2 , a zirconium deposit in the range of 1 to 6 mg / m 2 , preferably in the range of 1 to 2 mg / m 2 , a titanium coating in the range of 7 to 19 mg / m 2 , preferably in the range of 1 1 to 16 mg / m 2 , and a molybdenum coating in the range from 6 to 18 mg / m 2 , preferably in the range of 9 to 14 mg / m 2 , on the surface.
- the conditions are determined by X-ray fluorescence analysis (RFA).
- the surface is the surface of a belt, the surface being immersed in the aqueous composition at 50 to 55 ° C for 5 to 10 seconds.
- the surface is first rendered alkaline or alkaline and acidic, then rinsed thoroughly, preferably in several stages, with water and immersed in the aqueous composition.
- the present invention also relates to a component or tape having a surface which consists at least in part of aluminum or an aluminum alloy, wherein the component or tape is obtainable by the method according to the invention and optionally has been painted.
- the surface of the component or strip preferably has a phosphorus coating (calculated as P2O5) in the range from 8 to 17 mg / m 2 , preferably in the range from 10 to 15 mg / m 2 , a zirconium coating in the range of 1 to 6 mg / m 2 , preferably in the range of 1 to 2 mg / m 2 , a titanium coating in the range of 7 to 19 mg / m 2 , preferably in the range of 1 1 to 16 mg / m 2 , and a molybdenum coating in the range of 6 to 18 mg / m 2 , preferably in the range of 9 to 14 mg / m 2 .
- a phosphorus coating calculated as P2O5
- P2O5 phosphorus coating
- compositions B1 to B6 shown in Tab. 1 and the noninventive compositions VB1 to VB4 were prepared as follows. First, an aqueous acidic solution of a phosphorus compound was prepared. To this was added solid ammonium heptamolybdate and dissolved. Subsequently, it was supplemented with Zirkonflourid- and Titanflourid compounds, which were also in aqueous solution.
- the supports of phosphorus (as P2O5), zirconium, titanium and molybdenum were each determined by X-ray fluorescence analysis (RFA) (see Table 2). Subsequently, the sheets were coated using a 30 ⁇ ⁇ doctor blade with a polyamino resin combination. The paint was then baked in the oven for 45 seconds at 250 ° C (maximum temperature of the sheets: 224 ° C), so that a paint layer thickness of 7 ⁇ was obtained.
- compositions B1 to B6 according to the invention both in the T-bend test and in the cross-cut test.
- B1 and B2 deliver the best results.
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)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17792018T PL3545118T3 (pl) | 2016-11-23 | 2017-10-25 | Kompozycja i sposób bezchromowej obróbki wstępnej powierzchni aluminiowych |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016223170 | 2016-11-23 | ||
| PCT/EP2017/077308 WO2018095684A1 (de) | 2016-11-23 | 2017-10-25 | Zusammensetzung und verfahren zur chromfreien vorbehandlung von aluminiumoberflächen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3545118A1 true EP3545118A1 (de) | 2019-10-02 |
| EP3545118B1 EP3545118B1 (de) | 2020-08-19 |
Family
ID=60201551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17792018.8A Active EP3545118B1 (de) | 2016-11-23 | 2017-10-25 | Zusammensetzung und verfahren zur chromfreien vorbehandlung von aluminiumoberflächen |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US11686000B2 (de) |
| EP (1) | EP3545118B1 (de) |
| CN (1) | CN109983160B (de) |
| CA (1) | CA3041934A1 (de) |
| ES (1) | ES2832656T3 (de) |
| PL (1) | PL3545118T3 (de) |
| RU (1) | RU2754069C2 (de) |
| WO (1) | WO2018095684A1 (de) |
| ZA (1) | ZA201903869B (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143562A (en) * | 1991-11-01 | 1992-09-01 | Henkel Corporation | Broadly applicable phosphate conversion coating composition and process |
| MY130189A (en) * | 1994-03-24 | 2007-06-29 | Nihon Parkerizing | Aqueous composition and solution and process for metallic surface-treating an aluminum-containing metal material |
| DE4417965A1 (de) | 1994-05-21 | 1995-11-23 | Henkel Kgaa | Eisenphosphatierung unter Verwendung von substituierten Monocarbonsäuren |
| CA2417911C (en) * | 2000-08-01 | 2010-04-06 | Henkel Kommanditgesellschaft Auf Aktien | Phosphate conversion coating concentrate |
| US7947333B2 (en) | 2006-03-31 | 2011-05-24 | Chemetall Gmbh | Method for coating of metallic coil or sheets for producing hollow articles |
| DE102006039633A1 (de) * | 2006-08-24 | 2008-03-13 | Henkel Kgaa | Chromfreies, thermisch härtbares Korrosionsschutzmittel |
| DE102009047522A1 (de) * | 2009-12-04 | 2011-06-09 | Henkel Ag & Co. Kgaa | Mehrstufiges Vorbehandlungsverfahren für metallische Bauteile mit Zink- und Eisenoberflächen |
| IT1397902B1 (it) * | 2010-01-26 | 2013-02-04 | Np Coil Dexter Ind Srl | Processi di pretrattamento alla verniciatura, a basso impatto ambientale, alternativi ai trattamenti tradizionali di fosfatazione. |
| CN103276384B (zh) * | 2013-05-06 | 2015-12-09 | 大庆宝丰科技有限公司 | 通用型金属陶化皮膜处理剂及制备方法 |
| CN104561975A (zh) * | 2014-12-30 | 2015-04-29 | 广州市泓硕环保科技有限公司 | 一种铝合金免水洗彩色无铬钝化膜及钝化液和使用方法 |
| PL3350357T3 (pl) | 2015-09-15 | 2024-09-23 | Chemetall Gmbh | Obróbka wstępna powierzchni aluminiowych kompozycjami zawierającymi cyrkon i molibden |
-
2017
- 2017-10-25 CA CA3041934A patent/CA3041934A1/en active Pending
- 2017-10-25 US US16/463,196 patent/US11686000B2/en active Active
- 2017-10-25 CN CN201780071845.1A patent/CN109983160B/zh active Active
- 2017-10-25 ES ES17792018T patent/ES2832656T3/es active Active
- 2017-10-25 EP EP17792018.8A patent/EP3545118B1/de active Active
- 2017-10-25 WO PCT/EP2017/077308 patent/WO2018095684A1/de not_active Ceased
- 2017-10-25 RU RU2019118432A patent/RU2754069C2/ru active
- 2017-10-25 PL PL17792018T patent/PL3545118T3/pl unknown
-
2019
- 2019-06-14 ZA ZA2019/03869A patent/ZA201903869B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RU2019118432A3 (de) | 2021-03-19 |
| CN109983160A (zh) | 2019-07-05 |
| EP3545118B1 (de) | 2020-08-19 |
| ES2832656T3 (es) | 2021-06-10 |
| RU2754069C2 (ru) | 2021-08-25 |
| RU2019118432A (ru) | 2020-12-24 |
| WO2018095684A1 (de) | 2018-05-31 |
| PL3545118T3 (pl) | 2021-02-08 |
| US11686000B2 (en) | 2023-06-27 |
| BR112019010258A2 (pt) | 2019-09-03 |
| US20200063267A1 (en) | 2020-02-27 |
| CN109983160B (zh) | 2022-05-31 |
| ZA201903869B (en) | 2022-12-21 |
| CA3041934A1 (en) | 2018-05-31 |
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