EP0967301A2 - Beizaktivierungslösung für die Vorbehandlung von Aluminium-Stahl-Verbundwerkstoffen vor einer Tauchverzinnung - Google Patents
Beizaktivierungslösung für die Vorbehandlung von Aluminium-Stahl-Verbundwerkstoffen vor einer Tauchverzinnung Download PDFInfo
- Publication number
- EP0967301A2 EP0967301A2 EP99111464A EP99111464A EP0967301A2 EP 0967301 A2 EP0967301 A2 EP 0967301A2 EP 99111464 A EP99111464 A EP 99111464A EP 99111464 A EP99111464 A EP 99111464A EP 0967301 A2 EP0967301 A2 EP 0967301A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pickling
- aluminum
- solutions according
- activation
- tin
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1837—Multistep pretreatment
- C23C18/1844—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
Definitions
- the invention relates to an aqueous preparation for pickling and activation of aluminum-steel composites before one electroless plating.
- aluminum-steel composites are plain bearings, bushings, thrust washers, Dry sliding bearings etc. for pumps, motors and gears. After pickling activation, the aluminum and Steel surfaces of the substrate during a subsequent dip tinning even, particularly adhesive tin coatings achieved.
- EP-A-0 278 752 discloses substrates made of pure aluminum alloys after pretreatment consisting of degreasing and pickling, with acidic tin salt electrolytes in the exchange process to tin.
- the present invention is therefore concerned with the technical Problem, the pretreatment of the aluminum-steel composite to optimize.
- the task of present invention therein using the known Dip tinning baths uniform, adhesive tin coatings both on the aluminum as well as on the steel surfaces of the Manufacture substrate.
- Dilute sulfuric acid is suitable for pickling iron alloys, causes, however, at temperatures of up to 70 ° C and Diving times of a few minutes, no noticeable attack on Aluminum.
- Hexafluorosilicic acid cleans and activates aluminum alloys, without significantly attacking iron surfaces.
- the combination of both acids becomes the complex substrate structure made of two alloys with very different chemical and physical properties. Examples of aluminum-steel composites are plain bearings, bushings, thrust washers, Dry sliding bearings etc. for pumps, motors and gears.
- the acid mixture still have subgroup metal cations, such as B. manganese (II), nickel (II), iron (III) ions, in concentrations of 0.05 to 1 wt .-% are added.
- manganese (II) ions in a concentration are advantageous of 0.1% by weight at a pickling temperature of 40 ° C. and pickling times of 5 minutes.
- nitrate and / or nitrite ions proven positive.
- wetting agents are suitable all surfactants well wetting the substrate, which have a sufficient chemical resistance in the pickling activation electrolyte have.
- Wetting agents such as they are used in immersion tinning baths which are used in EP-A-0 278 752, for example Polyoxyethylene ether surfactants.
- the amount of wetting agent is preferably 1 to 20 g / l.
- the invention thus relates to aqueous pickling activation solutions for the pretreatment of aluminum-steel composites in front of an acidic dip tinning bath, which is characterized are that they are sulfuric acid, hexafluorosilicic acid, Wetting agents, subgroup metal cations and nitrate and / or Contain nitrite ions, in particular consist of them and prepare the substrate surface in such a way that uniform, adhesive tinning is obtained.
- the Amount of subgroup metal cations, in particular from the Group 1 and 2 and 5 to 8 of the Periodic Table of the Elements is preferably 0.05 to 1% by weight.
- the amount of nitrite ions is preferably 0.05 to 3% by weight, while the amount of nitrate ions is preferably in the same Area.
- Another embodiment of the invention includes a method for pickling activation of aluminum-steel composite materials, the is characterized in that pickling activation solutions with the composite at temperatures in the range of 15 to 70 ° C in Contact in the course of 1 to 9 min.
- test pieces were used as test pieces used. These are half shells made of steel, which on the inside with an aluminum alloy (approx. 80-90% aluminum, alloyed essentially with tin and silicon) are.
- aluminum alloy approximately 80-90% aluminum, alloyed essentially with tin and silicon
- the substrates were degreased in a manner known per se and rinsed.
- the substrates were placed in the solution for 5 minutes submerged.
- the temperature of the pickling solution was 40 ° C. After The substrates were rinsed for one minute during activation.
- Examples 1 to 3 and the Comparative Example were placed in a commercially available, acidic, external electroless tinning bath analogous to example 1 to 3 and the comparative example. It was at 30-40 ° C worked.
- the pickling with the nitric acid pretreatment caused a strong attack on the iron surfaces.
- the following dip tinning with dip tinning bath 1, 2 or 3 resulted in uneven tin deposits on the substrate surfaces.
- the iron surface had no closed tin surface.
- the adhesive strength was checked as above.
- the adhesive film test showed significant tin detachment from the aluminum surface.
- the tin layer thickness on the aluminum alloy was 1.8 to 4.2 ⁇ m before the test and only 0.2 to 0.5 ⁇ m after the test.
- Tinning bath 1 Tinning bath 2 Tinning bath 3 Solution 1 very good tin deposition, excellent adhesion very good tin deposition, excellent adhesion good tin deposition, very good adhesion Solution 2 very good tin deposition, very good adhesion very good tin deposition, very good adhesion good tin deposition, very good adhesion Solution 3 very good tin deposition, very good adhesion very good tin deposition, very good adhesion good tin deposition, very good adhesion Comparative example uneven tin deposition, low adhesive strength uneven tin deposition, low adhesive strength very uneven tin deposition, low adhesive strength very uneven tin deposition, low adhesive strength
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)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Chemically Coating (AREA)
- Chemical Treatment Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
- die Reinigung, Beizung und Verzinnung der Stahloberflächen und der Aluminiumoberflächen erfolgt ungleichmäßig,
- die Zinnabscheidung auf den Stahloberflächen erfolgt ungleichmäßig und ergibt keine geschlossene Oberfläche,
- die Haftfestigkeit der auf dem Aluminium abgeschiedenen Zinnschicht ist unzureichend.
- Schwefelsäure zur Beizung der Stahloberflächen,
- Hexafluorokieselsäure zur Beizung der Aluminiumoberflächen,
- Tenside zur gleichmäßigen Benetzung der Substratoberflächen mit der Lösung,
- Nebengruppenmetallkationen zur Optimierung der Beizung und Aktivierung der Aluminiumoberfläche,
- Nitrat- und/oder Nitrit-Ionen zur Optimierung der Beizung und Aktivierung der Aluminiumoberfläche.
Verzinnungsbad 1 | Verzinnungsbad 2 | Verzinnungsbad 3 | |
Lösung 1 | sehr gute Zinnabscheidung, hervorragende Haftung | sehr gute Zinnabscheidung, hervorragende Haftung | gute Zinnabscheidung, sehr gute Haftung |
Lösung 2 | sehr gute Zinnabscheidung, sehr gute Haftung | sehr gute Zinnabscheidung, sehr gute Haftung | gute Zinnabscheidung, sehr gute Haftung |
Lösung 3 | sehr gute Zinnabscheidung, sehr gute Haftung | sehr gute Zinnabscheidung, sehr gute Haftung | gute Zinnabscheidung, sehr gute Haftung |
Vergleichsbeispiel | ungleichmäßige Zinnabscheidung, geringe Haftfestigkeit | ungleichmäßige Zinnabscheidung, geringe Haftfestigkeit | sehr ungleichmäßige Zinnabscheidung,ger inge Haftfestigkeit |
Claims (10)
- Beizaktivierungslösungen für die Vorbehandlung von Aluminium-Stahl-Verbundwerkstoffen vor einer Tauchverzinnung, dadurch gekennzeichnet, daß sie Schwefelsäure, Hexafluorokieselsäure, Netzmittel, Nebengruppenmetallkationen und Nitrat-und/oder Nitrit-Ionen enthalten.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Schwefelsäure 50 bis 150 g/l beträgt
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Hexafluorokieselsäure 5 bis 25 g/l beträgt.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Netzmittel 1 bis 20 g/l beträgt.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß die Netzmittel ausgewählt sind aus Polyoxyethylenethertensiden.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Nebengruppenmetallkationen 0,05 bis 1 Gew.-% beträgt.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß die Nebengruppenmetallkationen ausgewählt sind aus den Nebengruppen 1 bis 2 und 5 bis 8.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Nitritionen 0,05 bis 3 Gew.-% beträgt.
- Lösungen nach Anspruch 1, dadurch gekennzeichnet, daß der Gehalt an Nitrationen 0,05 bis 3 Gew.-% beträgt.
- Verfahren zur Beizaktivierung von Aluminum-Stahl-Verbundwerkstoffen, dadurch gekennzeichnet, daß man Beizaktivierungslösungen gemäß einem oder mehreren der Ansprüche 1 bis 9 mit dem Verbund bei Temperaturen im Bereich von 15 bis 70 °C im Verlauf von 1 bis 9 min mit in Kontakt bringt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19828811 | 1998-06-27 | ||
DE19828811A DE19828811C1 (de) | 1998-06-27 | 1998-06-27 | Beizaktivierungslösung für die Vorbehandlung von Aluminium-Stahl-Verbundwerkstoffen vor einer Tauchverzinnung und Beizaktivierungsverfahren |
US09/340,004 US6194369B1 (en) | 1998-06-27 | 1999-06-25 | Pickling/activation solution for the pretreatment of aluminum-steel composites prior to dip tinning |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0967301A2 true EP0967301A2 (de) | 1999-12-29 |
EP0967301A3 EP0967301A3 (de) | 2000-06-28 |
EP0967301B1 EP0967301B1 (de) | 2003-11-19 |
Family
ID=26047094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99111464A Expired - Lifetime EP0967301B1 (de) | 1998-06-27 | 1999-06-12 | Beizaktivierungslösung für die Vorbehandlung von Aluminium-Stahl-Verbundwerkstoffen vor einer Tauchverzinnung |
Country Status (7)
Country | Link |
---|---|
US (1) | US6194369B1 (de) |
EP (1) | EP0967301B1 (de) |
AT (1) | ATE254678T1 (de) |
CA (1) | CA2276475C (de) |
DE (2) | DE19828811C1 (de) |
ES (1) | ES2210902T3 (de) |
PT (1) | PT967301E (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6436816B1 (en) * | 1998-07-31 | 2002-08-20 | Industrial Technology Research Institute | Method of electroless plating copper on nitride barrier |
EP1552035B1 (de) * | 2002-10-15 | 2010-08-25 | Henkel AG & Co. KGaA | Lösung und verfahren zum beizen von rostfreiem stahl |
US10443135B1 (en) * | 2018-05-11 | 2019-10-15 | Macdermid Enthone Inc. | Near neutral pH pickle on multi-metals |
CN111676474A (zh) * | 2020-06-05 | 2020-09-18 | 贵州水钢同鑫晟金属制品有限公司 | 一种预应力钢绞线低温快速磷化用活化剂及其制备方法 |
CN113445092B (zh) * | 2021-06-29 | 2022-10-11 | 钢铁研究总院 | 一种0Cr15Ni25Ti2MoAlVB不锈钢表面的镀铜方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2917019A1 (de) * | 1978-04-28 | 1979-11-08 | Gould Inc | Verfahren zur metallisierung von verbundmaterial und dazu geeignete badzusammensetzung |
EP0278752A1 (de) * | 1987-02-10 | 1988-08-17 | A.P.T. Advanced Plating Technologies, Ltd. | Eintauchlösung zur Zinnabscheidung und Abscheidungsverfahren unter Verwendung derselben |
US5227016A (en) * | 1992-02-25 | 1993-07-13 | Henkel Corporation | Process and composition for desmutting surfaces of aluminum and its alloys |
JPH07126899A (ja) * | 1993-11-05 | 1995-05-16 | Nippon Steel Corp | 含Cr鋼の高能率酸洗方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5629751B2 (de) * | 1973-05-22 | 1981-07-10 | ||
US4192722A (en) * | 1978-07-25 | 1980-03-11 | Reynolds Metals Company | Composition and method for stannate plating of large aluminum parts |
IT1276955B1 (it) * | 1995-10-18 | 1997-11-03 | Novamax Itb S R L | Processo di decapaggio e passivazione di acciaio inossidabile senza impiego di acido nitrico |
-
1998
- 1998-06-27 DE DE19828811A patent/DE19828811C1/de not_active Expired - Fee Related
-
1999
- 1999-06-12 EP EP99111464A patent/EP0967301B1/de not_active Expired - Lifetime
- 1999-06-12 PT PT99111464T patent/PT967301E/pt unknown
- 1999-06-12 DE DE59907772T patent/DE59907772D1/de not_active Expired - Lifetime
- 1999-06-12 AT AT99111464T patent/ATE254678T1/de not_active IP Right Cessation
- 1999-06-12 ES ES99111464T patent/ES2210902T3/es not_active Expired - Lifetime
- 1999-06-25 CA CA002276475A patent/CA2276475C/en not_active Expired - Fee Related
- 1999-06-25 US US09/340,004 patent/US6194369B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2917019A1 (de) * | 1978-04-28 | 1979-11-08 | Gould Inc | Verfahren zur metallisierung von verbundmaterial und dazu geeignete badzusammensetzung |
EP0278752A1 (de) * | 1987-02-10 | 1988-08-17 | A.P.T. Advanced Plating Technologies, Ltd. | Eintauchlösung zur Zinnabscheidung und Abscheidungsverfahren unter Verwendung derselben |
US5227016A (en) * | 1992-02-25 | 1993-07-13 | Henkel Corporation | Process and composition for desmutting surfaces of aluminum and its alloys |
JPH07126899A (ja) * | 1993-11-05 | 1995-05-16 | Nippon Steel Corp | 含Cr鋼の高能率酸洗方法 |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch, Week 198132 Derwent Publications Ltd., London, GB; Class M11, AN 1981-58064D XP002137068 -& JP 50 006534 A (TEIKOKU PISTON RING CO LTD), 23. Januar 1975 (1975-01-23) * |
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 08, 29. September 1995 (1995-09-29) -& JP 07 126899 A (NIPPON STEEL CORP), 16. Mai 1995 (1995-05-16) * |
Also Published As
Publication number | Publication date |
---|---|
CA2276475C (en) | 2007-05-22 |
EP0967301A3 (de) | 2000-06-28 |
EP0967301B1 (de) | 2003-11-19 |
ES2210902T3 (es) | 2004-07-01 |
US6194369B1 (en) | 2001-02-27 |
DE19828811C1 (de) | 1999-12-09 |
DE59907772D1 (de) | 2003-12-24 |
CA2276475A1 (en) | 1999-12-27 |
PT967301E (pt) | 2004-04-30 |
ATE254678T1 (de) | 2003-12-15 |
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