GB591834A - Improvements in or relating to indium electroplating - Google Patents
Improvements in or relating to indium electroplatingInfo
- Publication number
- GB591834A GB591834A GB5140/45A GB514045A GB591834A GB 591834 A GB591834 A GB 591834A GB 5140/45 A GB5140/45 A GB 5140/45A GB 514045 A GB514045 A GB 514045A GB 591834 A GB591834 A GB 591834A
- Authority
- GB
- United Kingdom
- Prior art keywords
- indium
- acid
- copper
- per
- oxide
- 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
- C25D3/54—Electroplating: Baths therefor from solutions of metals not provided for in groups C25D3/04 - C25D3/50
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
591,834. Electrodepositing indium. AMERICAN METAL CO., Ltd. March 1, 1945, No. 5140. Convention date, March 15, 1944. [Class 41] Indium is electrodeposited on copper, brass, aluminium, silver, lead, steel and cadmium, and especially for making lead-silver-steel bearings, from an electrolyte containing an indium salt of a stable per-acid together with a quantity of the per-acid in the free state. The preferred per-acid is perchloric acid, but periodic, persulphuric, permanganic, perchromic and permolybdic acids are also suitable, and glue may be added for extra-smooth deposits. The indium content may be 20-60 g.p.l., and free perchloric acid 1-75 g.p.l., the current-density is 10-55 amps/ft.<2>, voltage 0.6-2.5, and temperature 75-130‹ F. To keep the strength within limits at room temperature, a pH value of 0.5-1.5 should be maintained. The anodes may be of substantially-pure indium or inert material. The indium perchlorate may be produced by either (1) dissolving indium oxide or hydroxide, in perchloric acid, or (2) dissolving copper oxide or other lower oxide in the acid and then adding metallic indium to cement out the copper, or (3) electrolysis of a solution of the acid, using an indium anode and a small cathode until the proper strength of solution for electro-deposition of indium is obtained. Three specific examples are described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US526652A US2439935A (en) | 1944-03-15 | 1944-03-15 | Indium electroplating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB591834A true GB591834A (en) | 1947-08-29 |
Family
ID=24098202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5140/45A Expired GB591834A (en) | 1944-03-15 | 1945-03-01 | Improvements in or relating to indium electroplating |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2439935A (en) |
| GB (1) | GB591834A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB637159A (en) * | 1945-12-13 | 1950-05-17 | Vandervell Products Ltd | Improvements relating to the electrodeposition of metals |
| US3268426A (en) * | 1962-01-09 | 1966-08-23 | Alloys Unltd Inc | Electrolytic process for refining indium |
| EP1636839A2 (en) * | 2003-06-06 | 2006-03-22 | Honeywell International Inc. | Thermal interconnect system and method of production thereof |
-
1944
- 1944-03-15 US US526652A patent/US2439935A/en not_active Expired - Lifetime
-
1945
- 1945-03-01 GB GB5140/45A patent/GB591834A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2439935A (en) | 1948-04-20 |
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