DE242142C - - Google Patents
Info
- Publication number
- DE242142C DE242142C DENDAT242142D DE242142DA DE242142C DE 242142 C DE242142 C DE 242142C DE NDAT242142 D DENDAT242142 D DE NDAT242142D DE 242142D A DE242142D A DE 242142DA DE 242142 C DE242142 C DE 242142C
- Authority
- DE
- Germany
- Prior art keywords
- bath
- aluminum
- thin
- metal coating
- metal
- 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.)
- Active
Links
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M Potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 150000001447 alkali salts Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 235000011118 potassium hydroxide Nutrition 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 241000947840 Alteromonadales Species 0.000 description 1
- ZQULWKDLLXZZSP-UHFFFAOYSA-N Calcium cyanide Chemical compound [Ca+2].N#[C-].N#[C-] ZQULWKDLLXZZSP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- IEDRGHHDYMVJLD-UHFFFAOYSA-N [K+].[Cu++].[C-]#N.[C-]#N.[C-]#N Chemical compound [K+].[Cu++].[C-]#N.[C-]#N.[C-]#N IEDRGHHDYMVJLD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
DEUTSCHES REICHGERMAN EMPIRE
REICH S PATENTAMTREICH S PATENT OFFICE
PATENTSCHRIFTPATENT LETTERING
—■ M 242142 — KLASSE 48 a. GRUPPE- ■ M 242142 - CLASS 48 a. GROUP
in BERLIN.in Berlin.
galvanischer Metallüberzüge.galvanic metal coatings.
Patentiert im Deutschen Reiche vom 10. Oktober 1909 ab.Patented in the German Empire on October 10, 1909.
Nach dem den Gegenstand der vorliegenden Erfindung bildenden Verfahren soll der mit einem galvanischen Metallüberzug zu versehende Aluminiumgegenstand, nachdem er zuvor in bekannter Weise in einer alkalischen Lösung entfettet und gespült worden ist, in einem sogenannten Bindebade von bestimmter Zusammensetzung durch einen kurzdauernden Strom' zunächst einen hauchartigen elektrolytischen Metallniederschlag erhalten, auf welchen dann in bekannten elektrolytischen Bädern der gewünschte Metallüberzug niedergeschlagen' wird. Der erste in dem Bindebade gebildete dünne Niederschlag haftet fest an der Oberfläche des Aluminiums und bildet infolgedessen gleichsam ein Bindeglied zwischen diesem und dem darauf aufzubringenden Überzuge aus dem gewünschten Metall.According to the method forming the subject of the present invention, the with an aluminum object to be provided with a galvanic metal coating after it has been previously has been degreased and rinsed in a known manner in an alkaline solution, in a so-called binding bath of a certain composition by a short-lasting one Strom 'first received a puff-like electrolytic metal deposit on which then the desired metal coating is deposited in known electrolytic baths' will. The first thin precipitate formed in the binding bath adheres firmly the surface of the aluminum and consequently forms a link between this and the coatings to be applied thereon made of the desired metal.
Das Binde'bad besteht aus einer wässerigenThe binding bath consists of an aqueous one
ao Lösung von mehreren sogenannten Tripelsälzen (das sind Gemenge aus einem Schwermetallzyanid und Alkalizyanid) mit einem Zusatz von Ätznatron, Ätzkali, doppeltschwefligsaurem Natron, kohlensaurem Natron sowie zur Dämpfung etwaiger zu großer Alkalinität Salpetersäure und Jodkalium. In diesem Bade werden die mit einem galvanischen Überzuge zu versehenden entfetteten und gereinigten Aluminiumgegenstände als Kathoden während einer kurzen Zeit, und zwar etwa bis zu 2 Minuten, einem schwachen galvanischen Strom bis zu 31Z2 Volt ausgesetzt; dabei können die Anoden aus Metallplatten, z. B. aus Kupfer, bestehen. < Nach der Herstellung des dünnen Überzuges in diesem Bindebade wird der Aluminiumgegenstand abgespült und kann nunmehr in das elektrolytische Bad desjenigen Metalles eingebracht werden, mit welchem er überzogen werden soll. Auf diese Weise können Überzüge beliebiger Metalle auf Aluminium hergestellt werden.ao solution of several so-called triple salts (these are mixtures of a heavy metal cyanide and alkali cyanide) with the addition of caustic soda, caustic potash, bicarbonate of soda, carbonate of soda and to dampen any excessively high alkalinity nitric acid and potassium iodine. In this bath, the degreased and cleaned aluminum objects to be provided with a galvanic coating are exposed as cathodes to a weak galvanic current of up to 3 1 Z 2 volts for a short time, namely up to 2 minutes; the anodes can be made of metal plates, e.g. B. made of copper. <After the thin coating has been produced in this binding bath, the aluminum object is rinsed off and can now be placed in the electrolytic bath of the metal with which it is to be coated. In this way, coatings of any metal can be produced on aluminum.
Für das Bindebad empfiehlt sich etwa die folgende Zusammensetzung: 8 1 Wasser, 2 1 einer' 4Oprozentigen Lösung von Ätznatron und Ätzkali, 400 g Kupferkaliumzyanid, 50 g Ziakkaliumzyanid, 200 g doppeltschwefligsaures Natron, 50 g Salpetersäure, 50 g Jodkali.The following composition is recommended for the binding bath: 8 1 water, 2 1 a 40 percent solution of caustic soda and caustic potash, 400 g copper potassium cyanide, 50 g calcium cyanide, 200 g double sulfurous acid Baking soda, 50 g nitric acid, 50 g iodine potash.
Es ist zweckmäßig, wenn bei der Zusammensetzung des Bades die vorstehende Reihenfolge eingehalten wird. Jedoch kann auch die 40prozentige Lösung von Ätznatron und Ätzkali dem Bade getrennt zugesetzt werden.It is useful if the above sequence is used when composing the bath is adhered to. However, the 40 percent solution of caustic soda and caustic potash can also be used are added separately to the bath.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE242142C true DE242142C (en) |
Family
ID=501377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT242142D Active DE242142C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE242142C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747318C (en) * | 1942-06-26 | 1945-01-08 | Process for the production of aluminum workpieces to be soldered soft with the help of galvanic coatings |
-
0
- DE DENDAT242142D patent/DE242142C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747318C (en) * | 1942-06-26 | 1945-01-08 | Process for the production of aluminum workpieces to be soldered soft with the help of galvanic coatings |
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