GB626244A - Production of smooth electrodeposits - Google Patents
Production of smooth electrodepositsInfo
- Publication number
- GB626244A GB626244A GB10365/47A GB1036547A GB626244A GB 626244 A GB626244 A GB 626244A GB 10365/47 A GB10365/47 A GB 10365/47A GB 1036547 A GB1036547 A GB 1036547A GB 626244 A GB626244 A GB 626244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- copper
- article
- cyanide
- smoothing process
- sodium
- 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
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
- C25D3/40—Electroplating: Baths therefor from solutions of copper from cyanide baths, e.g. with Cu+
-
- 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
- C25D5/18—Electroplating using modulated, pulsed or reversing current
-
- 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
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
- C25D5/611—Smooth layers
-
- 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
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/615—Microstructure of the layers, e.g. mixed structure
- C25D5/617—Crystalline layers
-
- 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
- C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/02—Etching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
626,244. Electrodeposition of copper. DU PONT DE NEMOURS & CO., E. I. April 18, 1947, No. 10365. Convention date, April 17, 1946. [Class 41] A process for the electrodeposition of copper on articles includes a smoothing process wherein an initial copper deposit is made alternately cathodic and anodic for substantially equal periods of time from 1 to 5 seconds duration in an electrolyte containing copper cyanide. Preferably the initial deposition of copper takes place immediately before the smoothing process and the two processes takes place in the same electrolyte. As an example, a steel article is electroplated with copper in a bath containing copper cyanide, sodium cyanide, sodium hydroxide, and sodium sulphocyanide. The bath may also contain a brightener and anti-pitting agent consisting of a mixed aqueous solution of C-cetyl betaine and benzyl trimethyl ammonium chloride. The article is then made an electrode in a copper cyanide solution, which may be the same solution in which it was electroplated. The article is in circuit with a source of direct current and relays connected to a timing device so that the current is reversed every three seconds until the desired smoothing effect is obtained. Subsequent electroplating may be carried out which will produce a relatively thick, smooth copper deposit. In another example the article after being subjected to the electrolytic smoothing process is plated in a nickel bath containing nickel sulphate, nickel chloride, and boric acid. Specification 528,762 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US626244XA | 1946-04-17 | 1946-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB626244A true GB626244A (en) | 1949-07-12 |
Family
ID=22043716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10365/47A Expired GB626244A (en) | 1946-04-17 | 1947-04-18 | Production of smooth electrodeposits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB626244A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3088887A (en) * | 1958-11-03 | 1963-05-07 | Diamond Alkali Co | Electropolishing of zinc-copper alloys |
| US11965265B1 (en) * | 2020-01-30 | 2024-04-23 | The United States Of America As Represented By The Secretary Of The Navy | Hybrid electro-processing of a metal workpiece |
-
1947
- 1947-04-18 GB GB10365/47A patent/GB626244A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3088887A (en) * | 1958-11-03 | 1963-05-07 | Diamond Alkali Co | Electropolishing of zinc-copper alloys |
| US11965265B1 (en) * | 2020-01-30 | 2024-04-23 | The United States Of America As Represented By The Secretary Of The Navy | Hybrid electro-processing of a metal workpiece |
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