GB812338A - Electrodeposition of chromium plate - Google Patents
Electrodeposition of chromium plateInfo
- Publication number
- GB812338A GB812338A GB22187/55A GB2218755A GB812338A GB 812338 A GB812338 A GB 812338A GB 22187/55 A GB22187/55 A GB 22187/55A GB 2218755 A GB2218755 A GB 2218755A GB 812338 A GB812338 A GB 812338A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- sif
- cro
- aug
- 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
- C25D3/04—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)
- Catalysts (AREA)
Abstract
812,338. Electrodeposition of chromium. METAL & THERMIT CORPORATION. Aug. 2, 1955 [Aug. 12, 1954], No. 22187/55. Class 41. Crack-free chromium is electroplated on to a metal, e.g. steel article at a cathode current density of 0.5 to 8 amps./square inch at a temperature of 140‹ F. to the boiling point of the plating bath which contains 200 to 900 g./l. CrO 3 , 0.3 to 5.5 g./l. SO 4 <SP>11</SP> and 1.0 to 11.4 g./l. SiF 6 <SP>11</SP> without the addition of compounds suppressing the ionization of the catalyst radical compounds which are present to give a combined concentration (SO 4 <SP>11</SP> + SiF 6 <SP>11</SP>) of from 1.5 to 11.7 g./l. which varies with CrO 3 concentration as indicated by the area ABCD of the accompanying graph. The preferred operating concentrations, temperatures and current densities are substantially the same as those specified in Specification 771,925. The sulphate-supplying compound may be sulphuric acid or sodium, potassium, chromium, calcium or strontium sulphates while the silicofluoride supplying compound may be hydrofluosilicic acid or magnesium, sodium or potassium silicofluorides. Specification 697,786 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US449457A US2787589A (en) | 1954-08-12 | 1954-08-12 | Chromium plating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB812338A true GB812338A (en) | 1959-04-22 |
Family
ID=23784238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22187/55A Expired GB812338A (en) | 1954-08-12 | 1955-08-02 | Electrodeposition of chromium plate |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2787589A (en) |
| DE (1) | DE1112366B (en) |
| FR (1) | FR1129376A (en) |
| GB (1) | GB812338A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2916424A (en) * | 1957-11-07 | 1959-12-08 | Metal & Thermit Corp | Process for chromium plating |
| GB1091526A (en) * | 1963-07-24 | 1967-11-15 | Canning & Co Ltd W | Improvements in electrodeposition of chromium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2469015A (en) * | 1943-02-20 | 1949-05-03 | United Chromium Inc | Method and compositions for producing surface conversion coatings on zinc |
| US2499231A (en) * | 1944-08-25 | 1950-02-28 | United Chromium Inc | Method of producing surface conversion coatings on zinc |
| BE517665A (en) * | 1949-11-23 | |||
| US2640022A (en) * | 1950-11-07 | 1953-05-26 | United Chromium Inc | Composition, bath, and process for chromium plating |
| US2686756A (en) * | 1953-05-20 | 1954-08-17 | United Chromium Inc | Chromium plating |
-
1954
- 1954-08-12 US US449457A patent/US2787589A/en not_active Expired - Lifetime
-
1955
- 1955-08-02 GB GB22187/55A patent/GB812338A/en not_active Expired
- 1955-08-11 DE DEU3463A patent/DE1112366B/en active Pending
- 1955-08-11 FR FR1129376D patent/FR1129376A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1112366B (en) | 1961-08-03 |
| US2787589A (en) | 1957-04-02 |
| FR1129376A (en) | 1957-01-21 |
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