GB1179017A - Improvements in or relating to Gold Electroplating - Google Patents
Improvements in or relating to Gold ElectroplatingInfo
- Publication number
- GB1179017A GB1179017A GB8283/67A GB828367A GB1179017A GB 1179017 A GB1179017 A GB 1179017A GB 8283/67 A GB8283/67 A GB 8283/67A GB 828367 A GB828367 A GB 828367A GB 1179017 A GB1179017 A GB 1179017A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- gms
- pyrophosphate
- gold
- potassium
- 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
- C25D3/48—Electroplating: Baths therefor from solutions of gold
Abstract
1,179,017. Electrodepositing smooth ductile gold. ENGELHARD MINERALS & CHEMICALS CORP. Feb. 21, 1967 [Feb. 23, 1966], No.8283/67 Heading C7B. Smooth ductile yellow pure gold deposits are electro-plated from aqueous solutions of pH5 to 8 comprising per litre 4 to 50 gms. alkali metal gold cyanide, 10 to 200 gms. of an alkali metal pyrophosphate, 10 to 100 gms. of a pH adjusting acid, and 0.2 to 10 mgms. of a trivalent arsenic compound e. g. As 2 O 3 . The plating bath may also contain 1 to 110 gms/litre of a conducting salt of an organic acid such as the ammonium sodium or potassium salts of citric acid. The pH adjusting acid may phosphoric, polyphosphoric, boric, formic or tartaric acid but preferably is superphosphoric acid containing 72 to 85% by weight of P 2 O 5 . Acid salts such as ammonium citrate or monopotassium phosphate may also be used. Preferably the cyanide and pyrophosphate are the potassium salt and the pH is raised if required with potassium pyrophosphate or hydroxide or ammonium hydroxide and the baths are used at 45 to 65 C. with current densities of 3 to 10 amps. /sq. ft. and agitation of the bath to give deposits of thicknesses up to 0.05 inch.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52926266A | 1966-02-23 | 1966-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1179017A true GB1179017A (en) | 1970-01-28 |
Family
ID=24109170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8283/67A Expired GB1179017A (en) | 1966-02-23 | 1967-02-21 | Improvements in or relating to Gold Electroplating |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3423295A (en) |
| BE (1) | BE694539A (en) |
| CH (1) | CH485863A (en) |
| DE (1) | DE1621068B2 (en) |
| FR (1) | FR1508895A (en) |
| GB (1) | GB1179017A (en) |
| NL (1) | NL6700954A (en) |
| SE (1) | SE313714B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3520785A (en) * | 1969-04-14 | 1970-07-14 | Robert Duva | Electroplating gold and thiomalate electrolyte therefor |
| US3833488A (en) * | 1971-08-20 | 1974-09-03 | Auric Corp | Gold electroplating baths and process |
| US3897246A (en) * | 1971-12-15 | 1975-07-29 | Amp Inc | Novel electro deposited gold; electrolyte solution to obtain the same; method for producing said gold; and products |
| US3770596A (en) * | 1972-07-21 | 1973-11-06 | Auric Corp | Gold plating bath for barrel plating operations |
| US3833487A (en) * | 1972-12-22 | 1974-09-03 | Bell Telephone Labor Inc | Electrolytic soft gold plating |
| US3879269A (en) * | 1973-04-26 | 1975-04-22 | Auric Corp | Methods for high current density gold electroplating |
| US4075065A (en) * | 1975-07-07 | 1978-02-21 | Handy & Harman | Gold plating bath and process |
| US4238300A (en) * | 1979-05-25 | 1980-12-09 | Bell Telephone Laboratories, Incorporated | Gold electroplating process |
| EP0028684A1 (en) * | 1979-09-06 | 1981-05-20 | Western Electric Company, Incorporated | Manufacture and aftertreatment of an article plated with gold, and article obtained thereby |
| KR830003601A (en) * | 1979-09-06 | 1983-06-21 | 오. 이. 앨버 | Steel plating electroplating without additives and their products |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US744170A (en) * | 1899-08-26 | 1903-11-17 | Andre Darlay | Process of depositing metallic coatings on metallic objects. |
| US823864A (en) * | 1905-09-29 | 1906-06-19 | James M Dunnigan | Steam-boiler. |
| NL83731C (en) * | 1949-11-15 | |||
| US3149057A (en) * | 1959-04-27 | 1964-09-15 | Technic | Acid gold plating |
| CH354643A (en) * | 1959-11-24 | 1961-05-31 | Mermillod Jean | Bath for the galvanic deposition of shiny gold alloy, method of preparation and use of said bath |
| US2967135A (en) * | 1960-06-08 | 1961-01-03 | Barnet D Ostrow | Electroplating baths for hard bright gold deposits |
| BE620597A (en) * | 1961-08-23 |
-
1966
- 1966-02-23 US US529262A patent/US3423295A/en not_active Expired - Lifetime
-
1967
- 1967-01-20 NL NL6700954A patent/NL6700954A/xx unknown
- 1967-01-25 FR FR92430A patent/FR1508895A/en not_active Expired
- 1967-02-21 SE SE2399/67A patent/SE313714B/xx unknown
- 1967-02-21 GB GB8283/67A patent/GB1179017A/en not_active Expired
- 1967-02-22 CH CH258667A patent/CH485863A/en not_active IP Right Cessation
- 1967-02-22 DE DE19671621068 patent/DE1621068B2/en active Pending
- 1967-02-23 BE BE694539D patent/BE694539A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL6700954A (en) | 1967-08-24 |
| DE1621068B2 (en) | 1972-11-16 |
| BE694539A (en) | 1967-08-23 |
| US3423295A (en) | 1969-01-21 |
| CH485863A (en) | 1970-02-15 |
| DE1621068A1 (en) | 1971-04-15 |
| SE313714B (en) | 1969-08-18 |
| FR1508895A (en) | 1968-01-05 |
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