DE610689C - Process for achieving firmly adhering galvanic deposits on aluminum and its alloys - Google Patents
Process for achieving firmly adhering galvanic deposits on aluminum and its alloysInfo
- Publication number
- DE610689C DE610689C DES99296D DES0099296D DE610689C DE 610689 C DE610689 C DE 610689C DE S99296 D DES99296 D DE S99296D DE S0099296 D DES0099296 D DE S0099296D DE 610689 C DE610689 C DE 610689C
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- alloys
- achieving
- firmly adhering
- bath
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Chemically Coating (AREA)
Description
Verfahren zur Erzielung festhaftender galvanischer Niederschläge auf Aluminium und dessen Legierungen Es sind Verfahren zur Vorbehandlung von zu galvanisierendem Aluminium bekannt, nach denen ein durch anodische Oxydation entstandenes Oxydhäutchen unter gleichzeitiger Abscheidung gewisser Schwermetalle in einem Entfettungsbad behandelt wird.Process for achieving firmly adhering galvanic deposits Aluminum and its alloys There are processes for the pretreatment of what is to be electroplated Aluminum is known, according to which an oxide membrane formed by anodic oxidation with simultaneous separation of certain heavy metals in a degreasing bath is treated.
Nun hat sich gezeigt, daß die oxydative Vorhehandlung von Aluminium vorteilhaft statt durch Gleichstrombehandlung durch Anwendung von Wechselstrom erfolgen kann.It has now been shown that the oxidative pretreatment of aluminum advantageously take place by using alternating current instead of direct current treatment can.
Gemäß der Erfindung wird der zu plattierende Aluminiumgegenstand in einem Entfettungsbad mit Wechselstrom behandelt. Darauf wird das voroxydierte Objekt in einem metallsalzhaltigen Entfettungsbad kathodisch geschaltet sowie vorgalvanisiert, worauf die endgültige Galvanisierung erfolgt.According to the invention, the aluminum object to be plated is shown in treated in a degreasing bath with alternating current. Thereupon the pre-oxidized object becomes cathodically connected and pre-galvanized in a degreasing bath containing metal salts, whereupon the final electroplating takes place.
Die günstige Wirkung des Wechselstromes erklärt sich dabei aus der Tatsache, daß die Aluminiumelektrode unter der Einwirkung des Stromes ihre bekannte gleichrichtende Wirkung ausübt und zur Anode für den resultierenden intermittierenUen Gleichstrom wird.The beneficial effect of the alternating current is explained by the The fact that the aluminum electrode under the action of the current its known has a rectifying effect and becomes the anode for the resulting intermittierenUen DC becomes.
Verwendet man für den ersten Arbeitsgang, die Wechselstrombehandlung, gleich ein metallsalzhaltiges Bad, so kann man eine volle Phase des Verfahrens ersparen, indem man einfach nach der Voroxydation auf Gleichstrom umschaltet und dadurch einen Badwechsel vermeidet.If one uses for the first step, the alternating current treatment, even a bath containing metal salts can save a full phase of the process, by simply switching to direct current after the pre-oxidation and thereby a Avoids changing baths.
Hierbei ergeben sich naturgemäß. 'beachtliche Vorteile infolge einfacherer Handhabung und Ersparnis des Chromsäurebades sowie gegebenenfalls überhaupt eines besonderen Bades für den ersten Arbeitsgang. Die auf dem neuen Wege erzielten Niederschläge hafteten noch besser auf dem Aluminium als die nach anodischer Voroxydation mittels Gleichstroms ,erzeugten Überzüge.This naturally results. 'Considerable advantages due to simpler Handling and saving of the chromic acid bath and possibly even one special bath for the first step. The precipitation achieved in the new way adhered even better to the aluminum than those after anodic pre-oxidation Direct current, generated coatings.
Es sind Verfahren bekannt, bei denen nach der Wechselstrombehandlung eine Totalabätzung der Oxydschicht auf rein chemischem Wege erfolgt. Derartige Verfahren haben eine sehr starke Aufrauhung der Oberfläche zur Folge, so daß die auf diesem Wege erzeugten Überzüge niemals polierfähig sind, während die Polierbarkeit als besonderer Vorzug der nach dem neuen Verfahren hergestellten Überzüge zu gelten hat. Ausführungsb@e@spiiel In einem normalen Entfettungsbad mit Kupfer- und Zinkdoppelcyaniden -wurden ein Aluminium- und ein Eisenblech der Wirkung eines Wechselstromes von der Stromdichte 8oo Amp.Jm2 bei 3o bis ¢o Volt Spannung ausgesetzt. Nach 2 Minuten Behandlung wurde auf Gleichstrom umgeschaltet, wobei das Aluminium als Kathode geschaltet wurde. Bei einer Stromdichte von 3oo Amp./m2 und 5 Volt Spannung wurde etwa 5 Minuten lang Strom durchgeschickt und ein Häutchen von. Messing niedergeschlagen. Das Blech ließ sich danach in beliebigen galvanischen« Bädern überziehen. Die - Überzüge - Waitef' noch fester haftend als die nach der Vorschrift des Hauptpatents erzeugten.There are known methods in which after the alternating current treatment a total etching of the oxide layer takes place in a purely chemical way. Such procedures have a very strong roughening of the surface, so that on this Paths produced coatings are never polishable, while the polishability as special preference to apply to the coatings produced by the new process Has. Execution process In a normal degreasing bath with copper and zinc double cyanides -Were an aluminum and an iron sheet of the action of an alternating current Current density exposed to 8oo Amp.Jm2 at 3o to ¢ o volts. After 2 minutes of treatment became switched to direct current, with the aluminum being switched as the cathode. At a current density of 300 amps / m2 and a voltage of 5 volts, this took about 5 minutes Electricity sent through and a membrane from. Brass knocked down. The tin left then coat themselves in any galvanic bath. The - Coverings - Waitef ' even more firmly adhering than those produced according to the provisions of the main patent.
Claims (1)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1930S0011530 DE606850C (en) | 1930-11-07 | 1930-11-07 | Process for generating firmly adhering galvanic deposits on aluminum and its alloys |
| DES104429D DE611643C (en) | 1930-11-07 | 1932-05-01 | Process for generating galvanic deposits on aluminum and its alloys |
| DES108305D DE610206C (en) | 1930-11-07 | 1933-02-16 | Process for the production of firmly adhering galvanic deposits on aluminum and its alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE610689C true DE610689C (en) | 1935-03-14 |
Family
ID=40626731
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1930S0011530 Expired DE606850C (en) | 1930-11-07 | 1930-11-07 | Process for generating firmly adhering galvanic deposits on aluminum and its alloys |
| DES99296D Expired DE610689C (en) | 1930-11-07 | 1931-06-21 | Process for achieving firmly adhering galvanic deposits on aluminum and its alloys |
| DES104429D Expired DE611643C (en) | 1930-11-07 | 1932-05-01 | Process for generating galvanic deposits on aluminum and its alloys |
| DES108305D Expired DE610206C (en) | 1930-11-07 | 1933-02-16 | Process for the production of firmly adhering galvanic deposits on aluminum and its alloys |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1930S0011530 Expired DE606850C (en) | 1930-11-07 | 1930-11-07 | Process for generating firmly adhering galvanic deposits on aluminum and its alloys |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES104429D Expired DE611643C (en) | 1930-11-07 | 1932-05-01 | Process for generating galvanic deposits on aluminum and its alloys |
| DES108305D Expired DE610206C (en) | 1930-11-07 | 1933-02-16 | Process for the production of firmly adhering galvanic deposits on aluminum and its alloys |
Country Status (6)
| Country | Link |
|---|---|
| US (3) | US1947981A (en) |
| BE (1) | BE399452A (en) |
| DE (4) | DE606850C (en) |
| FR (3) | FR725848A (en) |
| GB (3) | GB385067A (en) |
| NL (1) | NL36860C (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2430468A (en) * | 1943-11-08 | 1947-11-11 | Bell Telephone Labor Inc | Electroplating silver on aluminum and its alloys |
| US2422903A (en) * | 1944-04-21 | 1947-06-24 | Western Electric Co | Process for electrolytically treating stainless steel articles |
| US2473163A (en) * | 1945-06-25 | 1949-06-14 | Ewald H Mccoy | Plating nickel on aluminum |
| US2541083A (en) * | 1945-08-25 | 1951-02-13 | Sperry Corp | Electroplating on aluminum |
| US2496845A (en) * | 1946-06-10 | 1950-02-07 | Chrysler Corp | Bath for brass immersion coating on aluminum and aluminum alloy |
| US2495941A (en) * | 1946-12-18 | 1950-01-31 | Reynolds Metals Co | Electroplating copper on aluminum |
| US2721835A (en) * | 1951-07-07 | 1955-10-25 | Shwayder Bros Inc | Surface treatment of aluminum articles |
| US2798037A (en) * | 1953-05-13 | 1957-07-02 | Sprague Electric Co | Aluminum oxide films |
| BE559886A (en) * | 1956-08-08 | |||
| DE1546005B1 (en) * | 1964-02-27 | 1971-01-21 | Schmidt Gmbh Karl | Treatment of sliding surfaces with chemically or galvanically coated surfaces |
| US3531379A (en) * | 1965-07-28 | 1970-09-29 | Micral Ind Inc | Process of coating aluminum with other metals |
| US3929594A (en) * | 1973-05-18 | 1975-12-30 | Fromson H A | Electroplated anodized aluminum articles |
| US4085012A (en) * | 1974-02-07 | 1978-04-18 | The Boeing Company | Method for providing environmentally stable aluminum surfaces for adhesive bonding and product produced |
| US4021592A (en) * | 1974-03-07 | 1977-05-03 | Fromson H A | Process of making electroplated anodized aluminum articles and electroless plating |
| US4159229A (en) * | 1977-06-03 | 1979-06-26 | Ford Motor Company | Method of plating light weight metal to enhance lateral corrosion resistance |
| US4157941A (en) * | 1977-06-03 | 1979-06-12 | Ford Motor Company | Method of adherency of electrodeposits on light weight metals |
| US4914081A (en) * | 1988-01-15 | 1990-04-03 | American Telephone And Telegraph Company, At&T Bell Laboratories | Process for making metallized structure and article comprising structure |
| US5466360A (en) * | 1994-10-13 | 1995-11-14 | Robert Z. Reath | Method for preparing aluminum for subsequent electroplating |
| JP4194143B2 (en) * | 1998-10-09 | 2008-12-10 | 株式会社神戸製鋼所 | Aluminum alloy material with excellent gas and plasma corrosion resistance |
| US20040072011A1 (en) * | 2002-10-10 | 2004-04-15 | Centro De Investigaciq Materiales Avanzados, S.C. | Electroless brass plating method and product-by-process |
| US20060254922A1 (en) * | 2005-03-21 | 2006-11-16 | Science & Technology Corporation @ Unm | Method of depositing films on aluminum alloys and films made by the method |
| DE102016113641A1 (en) | 2016-07-25 | 2018-01-25 | Christian-Albrechts-Universität Zu Kiel | Aluminum-copper connector having a heterostructure and method of making the heterostructure |
| US11261533B2 (en) | 2017-02-10 | 2022-03-01 | Applied Materials, Inc. | Aluminum plating at low temperature with high efficiency |
-
1930
- 1930-11-07 DE DE1930S0011530 patent/DE606850C/en not_active Expired
-
1931
- 1931-06-21 DE DES99296D patent/DE610689C/en not_active Expired
- 1931-10-31 US US572440A patent/US1947981A/en not_active Expired - Lifetime
- 1931-11-06 GB GB30791/31A patent/GB385067A/en not_active Expired
- 1931-11-06 FR FR725848D patent/FR725848A/en not_active Expired
-
1932
- 1932-05-01 DE DES104429D patent/DE611643C/en not_active Expired
-
1933
- 1933-02-16 DE DES108305D patent/DE610206C/en not_active Expired
- 1933-04-12 US US665741A patent/US1968483A/en not_active Expired - Lifetime
- 1933-04-13 GB GB11207/33A patent/GB394637A/en not_active Expired
- 1933-04-18 FR FR43472D patent/FR43472E/en not_active Expired
- 1933-10-27 NL NL67186A patent/NL36860C/xx active
- 1933-11-02 BE BE399452D patent/BE399452A/xx unknown
- 1933-11-03 FR FR44190D patent/FR44190E/en not_active Expired
- 1933-11-09 GB GB31263/33A patent/GB404251A/en not_active Expired
-
1934
- 1934-02-01 US US709349A patent/US2036962A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE610206C (en) | 1935-03-06 |
| GB404251A (en) | 1934-01-11 |
| FR43472E (en) | 1934-06-07 |
| GB385067A (en) | 1932-12-22 |
| US1968483A (en) | 1934-07-31 |
| FR44190E (en) | 1934-11-20 |
| US1947981A (en) | 1934-02-20 |
| BE399452A (en) | 1933-12-30 |
| GB394637A (en) | 1933-06-29 |
| DE611643C (en) | 1935-04-02 |
| US2036962A (en) | 1936-04-07 |
| DE606850C (en) | 1934-12-12 |
| FR725848A (en) | 1932-05-18 |
| NL36860C (en) | 1935-11-15 |
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