US2428404A - Electrodeposition of molybdenumcobalt alloys - Google Patents

Electrodeposition of molybdenumcobalt alloys Download PDF

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Publication number
US2428404A
US2428404A US532526A US53252644A US2428404A US 2428404 A US2428404 A US 2428404A US 532526 A US532526 A US 532526A US 53252644 A US53252644 A US 53252644A US 2428404 A US2428404 A US 2428404A
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US
United States
Prior art keywords
cobalt
per liter
grams per
molybdenum
alloys
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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 - Lifetime
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US532526A
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English (en)
Inventor
Leonard F Yntema
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President & Board Of Trustees
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President & Board Of Trustees
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Priority to US532526A priority Critical patent/US2428404A/en
Priority to FR913357D priority patent/FR913357A/fr
Application granted granted Critical
Publication of US2428404A publication Critical patent/US2428404A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
    • C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D317/46—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
    • C07D317/48—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
    • C07D317/50—Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to atoms of the carbocyclic ring
    • 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
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys

Definitions

  • the invention relates to the electrocodeposition of an alloy of molybdenum and a metal of the class consisting of cobalt and iron from aqueous solutions.
  • alloys may be codeposited from aqueous solutions when the molybdenum is present in the solution in the hexavalent form, when free alkali metal hydroxide is present and when there is an addition agent capable of holding the cobalt or iron in solution.
  • the molybdenum is added to the water in the form of the alkali metal salt, or, if desired, it may be added as molybdic acid or its anhydride, in which case it is converted into the molybdate form by the free alkali hydroxide. It is essential that free alkali hydroxide be present in the electrolyte during the electrodeposition and it is preferable that the electrolyte also contain alkali metal carbonate.
  • the cobalt or iron is added in the form of a salt such as sulfate, chloride, etc., but to maintain the same in solution it is necessary to add an organic compound having a hydroxyl group and capable of forming complexes with the cobalt or iron. Examples of such organic compounds are sugars, glycerine, glycols and tartaric acid. Inorganic compounds such as phosphates, sulfates and cyanides will not function for this purpose. Preferably I use dextrose.
  • the electrolyte must be strongly alkaline and good deposits are obtained from a solution containing 250 grams per liter of sodium hydroxide and 80 grams per liter of sodium carbonate.
  • the current density may be varied from 0.03 ampere per square decimeter to 0.5 or higher. Deposits may be obtained at room temperatures or at higher temperatures. I have obtained satisfactory deposits on cathodes of copper and iron.
  • the molybdenum-cobalt plates are bright, very hard and adherent, and are resistant to tarnishing by the atmosphere and to the action of a 3% sodium chloride solution.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
US532526A 1944-04-24 1944-04-24 Electrodeposition of molybdenumcobalt alloys Expired - Lifetime US2428404A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US532526A US2428404A (en) 1944-04-24 1944-04-24 Electrodeposition of molybdenumcobalt alloys
FR913357D FR913357A (fr) 1944-04-24 1945-08-14 Procédé pour la préparation de nouveaux composés, en particulier de dérivés del'aldéhyde piperonylique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US532526A US2428404A (en) 1944-04-24 1944-04-24 Electrodeposition of molybdenumcobalt alloys

Publications (1)

Publication Number Publication Date
US2428404A true US2428404A (en) 1947-10-07

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Family Applications (1)

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US532526A Expired - Lifetime US2428404A (en) 1944-04-24 1944-04-24 Electrodeposition of molybdenumcobalt alloys

Country Status (2)

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US (1) US2428404A (fr)
FR (1) FR913357A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599178A (en) * 1950-03-10 1952-06-03 Wisconsin Alumni Res Found Electrodeposition of alloys of molybdenum with cobalt, nickel, and iron
US2653127A (en) * 1946-11-08 1953-09-22 Brenner Abner Methods of and baths for electrodepositing cobalt or cobalt-molybdenum alloys

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885700A (en) * 1927-04-12 1932-11-01 Colin G Fink Electroplating and process of producing same
DE582528C (de) * 1929-06-07 1934-05-22 I G Farbenindustrie Akt Ges Verfahren zur elektrolytischen Herstellung von duennen, molybdaen-, wolfram-, vanadin-, beryllium-, wismut- und tantalhaltigen UEberzuegen auf Grundmetallen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885700A (en) * 1927-04-12 1932-11-01 Colin G Fink Electroplating and process of producing same
DE582528C (de) * 1929-06-07 1934-05-22 I G Farbenindustrie Akt Ges Verfahren zur elektrolytischen Herstellung von duennen, molybdaen-, wolfram-, vanadin-, beryllium-, wismut- und tantalhaltigen UEberzuegen auf Grundmetallen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653127A (en) * 1946-11-08 1953-09-22 Brenner Abner Methods of and baths for electrodepositing cobalt or cobalt-molybdenum alloys
US2599178A (en) * 1950-03-10 1952-06-03 Wisconsin Alumni Res Found Electrodeposition of alloys of molybdenum with cobalt, nickel, and iron

Also Published As

Publication number Publication date
FR913357A (fr) 1946-09-05

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