FR2451948A1 - Hard electroplated coating for metals, esp. steels - contains cobalt, tungsten and tungsten carbide, and is heat treated to obtain high corrosion resistance, esp. to sea water - Google Patents
Hard electroplated coating for metals, esp. steels - contains cobalt, tungsten and tungsten carbide, and is heat treated to obtain high corrosion resistance, esp. to sea waterInfo
- Publication number
- FR2451948A1 FR2451948A1 FR7907470A FR7907470A FR2451948A1 FR 2451948 A1 FR2451948 A1 FR 2451948A1 FR 7907470 A FR7907470 A FR 7907470A FR 7907470 A FR7907470 A FR 7907470A FR 2451948 A1 FR2451948 A1 FR 2451948A1
- Authority
- FR
- France
- Prior art keywords
- esp
- tungsten
- heat treated
- bath
- substrate
- 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.)
- Granted
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
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
- C25D15/02—Combined electrolytic and electrophoretic processes with charged materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
A metal substrate is electroplated in a bath contg. the salts of Co and W, but no Cr; and particles of tungsten carbide are suspended in the bath. The hard coating thus obtd. is then heat treated so it is consolidated and bonds to the substrate; the coating thickness and the short heating times ensures that less than 2% of the substrate metal is on the surface of the coated prod. The substrate is pref. steel 100-C-6; or steel Z-100-CD; and the pref. bath contains CoSO4, CoC12, Na2WO4, and less than 300 g/l powdered W-C. The bath pH is pref. 4-5.5, obtd. by adding boric acid. The coating resists a variety of corrosive media without cracking, and is esp. useful for ball bearings exposed to marine atmos.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7907470A FR2451948A1 (en) | 1979-03-19 | 1979-03-19 | Hard electroplated coating for metals, esp. steels - contains cobalt, tungsten and tungsten carbide, and is heat treated to obtain high corrosion resistance, esp. to sea water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7907470A FR2451948A1 (en) | 1979-03-19 | 1979-03-19 | Hard electroplated coating for metals, esp. steels - contains cobalt, tungsten and tungsten carbide, and is heat treated to obtain high corrosion resistance, esp. to sea water |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2451948A1 true FR2451948A1 (en) | 1980-10-17 |
FR2451948B1 FR2451948B1 (en) | 1983-07-01 |
Family
ID=9223530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7907470A Granted FR2451948A1 (en) | 1979-03-19 | 1979-03-19 | Hard electroplated coating for metals, esp. steels - contains cobalt, tungsten and tungsten carbide, and is heat treated to obtain high corrosion resistance, esp. to sea water |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2451948A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2009987A1 (en) * | 1968-05-31 | 1970-02-13 | Ionic Plating Co Ltd | IMPROVEMENTS IN TOOLS USED TO WORK METALS AND OTHER MATERIALS |
GB1236954A (en) * | 1968-04-26 | 1971-06-23 | Bristol Aerojet Ltd | Improvements in and relating to electrodeposited composite coatings |
GB1347184A (en) * | 1972-07-07 | 1974-02-27 | Bristol Aerojet Ltd | Electrodeposition of composite coatings |
FR2303085A1 (en) * | 1975-03-05 | 1976-10-01 | Int Nickel Ltd | ALLOY MANUFACTURING PROCESS |
-
1979
- 1979-03-19 FR FR7907470A patent/FR2451948A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1236954A (en) * | 1968-04-26 | 1971-06-23 | Bristol Aerojet Ltd | Improvements in and relating to electrodeposited composite coatings |
FR2009987A1 (en) * | 1968-05-31 | 1970-02-13 | Ionic Plating Co Ltd | IMPROVEMENTS IN TOOLS USED TO WORK METALS AND OTHER MATERIALS |
GB1347184A (en) * | 1972-07-07 | 1974-02-27 | Bristol Aerojet Ltd | Electrodeposition of composite coatings |
FR2303085A1 (en) * | 1975-03-05 | 1976-10-01 | Int Nickel Ltd | ALLOY MANUFACTURING PROCESS |
Also Published As
Publication number | Publication date |
---|---|
FR2451948B1 (en) | 1983-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |