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GB627964A - Electroplating metals - Google Patents

Electroplating metals

Info

Publication number
GB627964A
GB627964A GB18972/45A GB1897245A GB627964A GB 627964 A GB627964 A GB 627964A GB 18972/45 A GB18972/45 A GB 18972/45A GB 1897245 A GB1897245 A GB 1897245A GB 627964 A GB627964 A GB 627964A
Authority
GB
United Kingdom
Prior art keywords
volts
current
voltage
plating bath
electro
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
Application number
GB18972/45A
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.)
Poor and Co
Original Assignee
Poor and Co
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 Poor and Co filed Critical Poor and Co
Publication of GB627964A publication Critical patent/GB627964A/en
Expired 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
    • C25D5/18—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
    • C25D5/60—Electroplating characterised by the structure or texture of the layers
    • C25D5/605—Surface topography of the layers, e.g. rough, dendritic or nodular layers
    • C25D5/611—Smooth 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
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S204/00—Chemistry: electrical and wave energy
    • Y10S204/09—Wave forms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

627,964. Electrodeposition of metals. POOR & CO. July 24, 1945, No. 18972. Convention date, April 14. [Class 41] A method of electro - depositing metals comprises passing a plating current of abnormal wave - form having peaks and valleys through an alkaline plating bath of a metal to be deposited, the valley value of the voltage being within the range of a maximum of 1.9 volts to a minimum of minus two-thirds of the positive peak value. As shown, an anode 2 comprising one or more electrodes, and a cathode 3 are in a circuit containing a rheostat 9, a lowvoltage direct current generator 8 and the secondary 4 of a transformer 5. The primary 6 is connected through a regulating autotransformer 7 to a source of alternating current. In one example of a method of electroplating, a plating bath containing cadmium oxide and sodium cyanide is subjected to a current in sine wave-form with four volts alternating current and six volts direct current. The valley voltage is just below 1.9 volts. In another example a plating bath containing copper cyanide, sodium cyanide, sodium hydroxide and potassium gluconate is subjected to current from an A.C. voltage of 7 volts superimposed on a D.C. voltage of 6 volts. Other examples are given in connection with electro-deposition of zinc and tin. Reference has been directed by the Comptroller to Specification 599,707.
GB18972/45A 1945-04-14 1945-07-24 Electroplating metals Expired GB627964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US588399A US2548867A (en) 1945-04-14 1945-04-14 Electroplating metals

Publications (1)

Publication Number Publication Date
GB627964A true GB627964A (en) 1949-08-19

Family

ID=24353687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18972/45A Expired GB627964A (en) 1945-04-14 1945-07-24 Electroplating metals

Country Status (3)

Country Link
US (1) US2548867A (en)
FR (1) FR912372A (en)
GB (1) GB627964A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB741864A (en) * 1952-06-04 1955-12-14 Silvercrown Ltd Improvements in the electrodeposition of alloys containing copper and tin
US2916423A (en) * 1957-06-19 1959-12-08 Metal & Thermit Corp Electrodeposition of copper and copper alloys
US3257841A (en) * 1961-03-08 1966-06-28 Jr Samuel C Lawrence Paint stripping system
US3959088A (en) * 1975-03-19 1976-05-25 The United States Of America As Represented By The Secretary Of The Army Method and apparatus for generating high amperage pulses from an A-C power source
US4038158A (en) * 1975-10-22 1977-07-26 E. I. Du Pont De Nemours And Company Electrochemical generation of field desorption emitters

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US741231A (en) * 1902-07-03 1903-10-13 Arthur L Collins Process of treating cyanid solutions.
US961924A (en) * 1909-03-10 1910-06-21 Norddeutsche Affinerie Process for refining gold.
US1534709A (en) * 1924-05-17 1925-04-21 Francis A Holt Method of conducting electrolytic operations
US1918605A (en) * 1928-01-09 1933-07-18 Parker Rust Proof Co Chromium plating
US2063760A (en) * 1931-09-10 1936-12-08 Schulein Joseph Bath for and process of electrodeposition of metal
US2078869A (en) * 1934-07-30 1937-04-27 Du Pont Electroplating process
US2143761A (en) * 1936-12-11 1939-01-10 Plating And Galvanizing Compan Method and composition for the bright coating of zinc
FR960114A (en) * 1942-05-04 1950-04-13
FR960115A (en) * 1947-08-09 1950-04-13

Also Published As

Publication number Publication date
FR912372A (en) 1946-08-07
US2548867A (en) 1951-04-17

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