GB566218A - Improvements in the electrodeposition of chromium - Google Patents
Improvements in the electrodeposition of chromiumInfo
- Publication number
- GB566218A GB566218A GB1056443A GB1056443A GB566218A GB 566218 A GB566218 A GB 566218A GB 1056443 A GB1056443 A GB 1056443A GB 1056443 A GB1056443 A GB 1056443A GB 566218 A GB566218 A GB 566218A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- trivalent
- anode
- deposit
- bath
- 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
566,218. Electrodeposition of chromium. MACNAIR, J. L. P., and GARDAM, G. E. Jan. 8, 1943, No. 10564. Divided out of 15071/41. [Class 41] Chromium of low hardness is obtained at an increased rate of deposit from a bath of chromic and sulphuric acids containing more than a normal amount of a trivalent metallic ion which may be provided by adding to the bath iron as a ferric or ferrous compound, chromium, aluminium, or other trivalent metal in suitable form or by increasing the amount of trivalent chromium compound normally present as by using an anode of relatively low oxygen overvoltage, such as iron or nickel, or by enclosing the anode in a porous pot, or by chemically reducing a part of the chromic acid by adding sugar, glucose, or hydrogen peroxide, the operation being carried out at a temperature of from 70 to 90‹ C. The hardness of the deposit may be .further reduced by low-temperature heat treatment, for instance, for from 1 to 24 hours at 150-250‹ C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1056443A GB566218A (en) | 1943-01-08 | 1943-01-08 | Improvements in the electrodeposition of chromium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1056443A GB566218A (en) | 1943-01-08 | 1943-01-08 | Improvements in the electrodeposition of chromium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB566218A true GB566218A (en) | 1944-12-19 |
Family
ID=9970158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1056443A Expired GB566218A (en) | 1943-01-08 | 1943-01-08 | Improvements in the electrodeposition of chromium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB566218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2640021A (en) * | 1949-11-23 | 1953-05-26 | United Chromium Inc | Composition, bath, and process for chromium plating |
-
1943
- 1943-01-08 GB GB1056443A patent/GB566218A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2640021A (en) * | 1949-11-23 | 1953-05-26 | United Chromium Inc | Composition, bath, and process for chromium plating |
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