US490841A - Georg wegner - Google Patents
Georg wegner Download PDFInfo
- Publication number
- US490841A US490841A US490841DA US490841A US 490841 A US490841 A US 490841A US 490841D A US490841D A US 490841DA US 490841 A US490841 A US 490841A
- Authority
- US
- United States
- Prior art keywords
- aluminum
- wegner
- georg
- zinc
- silver
- 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 - Lifetime
Links
- 229910052782 aluminium Inorganic materials 0.000 description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 238000005246 galvanizing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000497 Amalgam Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000005406 washing Methods 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
Definitions
- Objects made of aluminum, that are to be galvanized are first freed by such known means as potassium hydrate, &c. from all particles of grease, and after washing in clear water, and then dipped in a bath at boiling heat, containing cyanides of silver and mercury, for one to two minutes. In this process there forms a deposit of silver amalgam, on the aluminum, forming a thin fast adhering coat.
- the before described process is necessary in order to make the aluminum, which is known to be a bad conductor, more conducting for the later galvanizing, and more advantageous in its operation as a cathode.
- the amalgamated aluminum is laid in a second bath in which chloride of zinc and sulphate of soda are dissolved; the anode and cathode formed by the amalgamated aluminum are connected in the usual way with a galvanic battery of low tension, and the latter left closed until a coating of zinc of desired thickness is formed on the aluminum, that is, on the amalgam.
- the aluminum is sufficiently prepared to be coated with copper, silver or gold, &c., in the manner usual with other metals, in which case. by using alloys, it is possible to give the aluminum any desired coloring.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Description
. NITED STATES PATENT OFFICE.
GEORG WEGNER, OF BERLIN, GERMANY.
PROCESS OF ELECTROPLATING ALUMINUM.
SPECIFICATION forming part of Letters Patent No. 490,841, dated'January 31, 1893. Application filed May 5, 1892. Serial No. 431,886. (No specimens.)
To all whom it may concern:
Be it known that I, GEORG WEGNER, a subject of the Emperor of Germany, residing at Berlin, Germany, have invented certain new and usefullmprovements in Processes of Electroplating Aluminum; and I do hereby declare the following to be a full, clear, and exact specification.
Objects made of aluminum, that are to be galvanized, are first freed by such known means as potassium hydrate, &c. from all particles of grease, and after washing in clear water, and then dipped in a bath at boiling heat, containing cyanides of silver and mercury, for one to two minutes. In this process there forms a deposit of silver amalgam, on the aluminum, forming a thin fast adhering coat. The before described processis necessary in order to make the aluminum, which is known to be a bad conductor, more conducting for the later galvanizing, and more advantageous in its operation as a cathode. Hereupon the amalgamated aluminum is laid in a second bath in which chloride of zinc and sulphate of soda are dissolved; the anode and cathode formed by the amalgamated aluminum are connected in the usual way with a galvanic battery of low tension, and the latter left closed until a coating of zinc of desired thickness is formed on the aluminum, that is, on the amalgam. After this second treatment the aluminum is sufficiently prepared to be coated with copper, silver or gold, &c., in the manner usual with other metals, in which case. by using alloys, it is possible to give the aluminum any desired coloring.
All attempts hitherto made to electroplate aluminum directly, have given negative results,l oecause the silver or cyanidebaths used, which are employed for galvanizing other metals, affected the aluminum; the aluminum is protected from the destroying action of the acids by the coating of zinc, and can be subjected to the galvanizing process like any other metal.
I claim:
The hereinbefore described process of galvanizing aluminum, consisting in first dipping into a bath at boiling temperature, con taining cyanides of silver and mercury, to heighten its conductivity; then electrically coating with zinc, in a bath containing chloride of zinc and sulphate of soda, to protect the aluminum against the acid bath in coppering, silvering, gilding, &c.
In witness whereof I have hereunto set my hand in presence of two witnesses.
GEORG WEGNER.
Wit n esses:
R. BAYER, W. HAUPT.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US490841A true US490841A (en) | 1893-01-31 |
Family
ID=2559687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US490841D Expired - Lifetime US490841A (en) | Georg wegner |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US490841A (en) |
-
0
- US US490841D patent/US490841A/en not_active Expired - Lifetime
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