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 water

Info

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
Application number
FR7907470A
Other languages
French (fr)
Other versions
FR2451948B1 (en
Inventor
Pierre Guiraldenq
Daniel Treheux
Leo Vincent
Guy Le Quang
Denise Juve-Duc
Alain Chanel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7907470A priority Critical patent/FR2451948A1/en
Publication of FR2451948A1 publication Critical patent/FR2451948A1/en
Application granted granted Critical
Publication of FR2451948B1 publication Critical patent/FR2451948B1/fr
Granted legal-status Critical Current

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.
FR7907470A 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 Granted FR2451948A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

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ST Notification of lapse