GB1073909A - Improvements in or relating to chromium electroplatining - Google Patents
Improvements in or relating to chromium electroplatiningInfo
- Publication number
- GB1073909A GB1073909A GB54562/65A GB5456265A GB1073909A GB 1073909 A GB1073909 A GB 1073909A GB 54562/65 A GB54562/65 A GB 54562/65A GB 5456265 A GB5456265 A GB 5456265A GB 1073909 A GB1073909 A GB 1073909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bath
- acid
- sif6
- cro3
- electrodeposited
- 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
- C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
Abstract
Bright chromium plate is electrodeposited on to a basis metal, e.g. Cr, Mn, Fe, Co, Ni, Cu, Zn, brass or stainless steel, using a plating bath containing chromic acid and sulphate and an anion of a halogenated organic carboxylic acid having at least three carbon atoms, e.g. dichloroadipic or dichlorosuccinic acid, anhydride or salt e.g. sodium thereof. Many other examples of halogenated aliphatic or aromatic carboxylic acids are specified. The ratio of CrO3 to SO4 and other inorganic anions including F ions, such as SiF6, TiF6 or BF4, is 125-550:1. The bath preferably contains 150 - 500 g/1 CrO3, 0.5 - 100 g/1 organic acid, and either (a) 0.4-3.3 g/l SO4, e.g. as Na2SO4, for a standard bath, (b) 0.05 - 2 g/1 each of SO4 and SiF6 ion for a mixed catalyst bath, or (c) 0.6 - 10 g/l SrSO4 and 0 - 12 g/l excess Sr ion, e.g. as SrCO3 or Sr(OH)2, for a self-regulating bath. Sulphogroups may be included in the carboxylic acid. The basis metal may be active Ni electrodeposited on to Fe. A Ni surface may be rendered active by cathodic treatment in HCl or H2SO4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42160064A | 1964-12-28 | 1964-12-28 | |
| US709874A US3505183A (en) | 1964-12-28 | 1968-03-04 | Process and compositions for electroplating chromium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1073909A true GB1073909A (en) | 1967-06-28 |
Family
ID=27025305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB54562/65A Expired GB1073909A (en) | 1964-12-28 | 1965-12-23 | Improvements in or relating to chromium electroplatining |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3505183A (en) |
| CH (1) | CH467867A (en) |
| DE (1) | DE1290782B (en) |
| FR (1) | FR1461964A (en) |
| GB (1) | GB1073909A (en) |
| NL (1) | NL6517036A (en) |
| SE (1) | SE321129B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953136A (en) * | 1972-07-07 | 1974-05-23 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1289117A (en) * | 1969-10-10 | 1972-09-13 | ||
| US3706636A (en) * | 1971-02-19 | 1972-12-19 | Du Pont | Preparing plating bath containing chromic compound |
| US3867267A (en) * | 1973-11-15 | 1975-02-18 | Oxy Metal Finishing Corp | Chromium plating |
| GB1492702A (en) * | 1974-01-23 | 1977-11-23 | Vintage Curacao Nv | Electroplating process for chrome |
| FR2289636A1 (en) * | 1974-10-29 | 1976-05-28 | Rotel Ag | Chromium electro-plating bath contg metal complex - of polyhalogenated polycarboxylic acid improving throwing power and hardness |
| 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 |
| US4206019A (en) * | 1978-04-07 | 1980-06-03 | M&T Chemicals Inc. | Novel low concentration decorative chromium plating baths and method |
| EP0041085A1 (en) * | 1980-06-02 | 1981-12-09 | M & T Chemicals, Inc. | Chromium plating process, composition therefor and chromium plating solution |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2623847A (en) * | 1947-09-10 | 1952-12-30 | Lloyd O Gilbert | Black chromium plating |
| US2640022A (en) * | 1950-11-07 | 1953-05-26 | United Chromium Inc | Composition, bath, and process for chromium plating |
| BE632459A (en) * | 1962-05-16 | |||
| US3282812A (en) * | 1964-02-20 | 1966-11-01 | Udylite Corp | Electrodeposition of chromium |
-
1965
- 1965-12-22 DE DEM67761A patent/DE1290782B/en not_active Withdrawn
- 1965-12-23 GB GB54562/65A patent/GB1073909A/en not_active Expired
- 1965-12-24 CH CH1784565A patent/CH467867A/en unknown
- 1965-12-27 SE SE16781/65A patent/SE321129B/xx unknown
- 1965-12-28 NL NL6517036A patent/NL6517036A/xx unknown
- 1965-12-28 FR FR43899A patent/FR1461964A/en not_active Expired
-
1968
- 1968-03-04 US US709874A patent/US3505183A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953136A (en) * | 1972-07-07 | 1974-05-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6517036A (en) | 1966-06-29 |
| DE1290782B (en) | 1969-03-13 |
| FR1461964A (en) | 1966-12-09 |
| US3505183A (en) | 1970-04-07 |
| SE321129B (en) | 1970-02-23 |
| CH467867A (en) | 1969-01-31 |
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