GB1322152A - Chromium electro plating - Google Patents
Chromium electro platingInfo
- Publication number
- GB1322152A GB1322152A GB1322152DA GB1322152A GB 1322152 A GB1322152 A GB 1322152A GB 1322152D A GB1322152D A GB 1322152DA GB 1322152 A GB1322152 A GB 1322152A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bath
- catalytic
- ammonium salt
- strontium
- ammonium
- 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
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
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)
Abstract
1322152 Electro-deposition of chromium M L ALKAN Ltd 13 Dec 1971 [27 Jan 1971] 3326/71 Headings C7B and C7C An aqueous chromium plating bath comprises chromic acid, strontium sulphate in excess of its solubility in the bath and ammonium silicoflouride to provide SO4 and SiF 6 catalytic ions, at least one non-catalytic strontium compound, e.g. strontium chromate, which will produce regulation of the sulphate content of the bath; and may also contain a non-catalytic ammonium salt, e.g. ammonium dichromate. The bath may be produced from a dry composition of the above substances, including 80-90 wt. per cent chromic acid. As fume suppressant an ammonium salt of a fluorinated carboxylic or sulphonic acid may be used; and may be added to the bath as a solution, or as a tablet containing a suitable ammonium salt as a binder. Selection of bath temperature will produce hard or mirror bright coatings, e.g. using tin/lead alloy or antimonial/lead alloy as counter-electrode. Articles to be plated may be nickel coated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB332671 | 1971-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1322152A true GB1322152A (en) | 1973-07-04 |
Family
ID=9756205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1322152D Expired GB1322152A (en) | 1971-01-27 | 1971-01-27 | Chromium electro plating |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1322152A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092226A (en) * | 1974-12-11 | 1978-05-30 | Nikolaus Laing | Process for the treatment of metal surfaces by electro-deposition of metal coatings at high current densities |
-
1971
- 1971-01-27 GB GB1322152D patent/GB1322152A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092226A (en) * | 1974-12-11 | 1978-05-30 | Nikolaus Laing | Process for the treatment of metal surfaces by electro-deposition of metal coatings at high current densities |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |