GB1291566A - A method of electro-depositing micro cracked chromium - Google Patents
A method of electro-depositing micro cracked chromiumInfo
- Publication number
- GB1291566A GB1291566A GB59422/68A GB5942268A GB1291566A GB 1291566 A GB1291566 A GB 1291566A GB 59422/68 A GB59422/68 A GB 59422/68A GB 5942268 A GB5942268 A GB 5942268A GB 1291566 A GB1291566 A GB 1291566A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electro
- current
- micro
- chromium
- cracked chromium
- 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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/60—Electroplating characterised by the structure or texture of the layers
- C25D5/625—Discontinuous layers, e.g. microcracked layers
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/18—Electroplating using modulated, pulsed or reversing current
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Physical Vapour Deposition (AREA)
Abstract
1291566 Electro-deposition of micro-cracked chromium W CANNING & CO Ltd 11 Dec 1969 [13 Dec 1968] 59422/68 Heading C7B In the electro-deposition of micro-cracked chromium, the current is periodically increased from a first value giving an average current density over the surface being plated of at least 100 amps/sq. ft., to a second value which is not sufficient to cause burning on the high current density areas, and thereafter returned to the first value. The higher current preferably flows for at least 50% of the time, with the number of current cycles being more than 7À5/min. The current may be supplied from two rectified A. C. supplies connected in series. The substrate may be plated with bright nickel prior to the micro-cracked chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB59422/68A GB1291566A (en) | 1968-12-13 | 1968-12-13 | A method of electro-depositing micro cracked chromium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB59422/68A GB1291566A (en) | 1968-12-13 | 1968-12-13 | A method of electro-depositing micro cracked chromium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1291566A true GB1291566A (en) | 1972-10-04 |
Family
ID=10483740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB59422/68A Expired GB1291566A (en) | 1968-12-13 | 1968-12-13 | A method of electro-depositing micro cracked chromium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1291566A (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 |
-
1968
- 1968-12-13 GB GB59422/68A patent/GB1291566A/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 [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |