GB625990A - Improvements in or relating to electroplating - Google Patents

Improvements in or relating to electroplating

Info

Publication number
GB625990A
GB625990A GB9010/47A GB901047A GB625990A GB 625990 A GB625990 A GB 625990A GB 9010/47 A GB9010/47 A GB 9010/47A GB 901047 A GB901047 A GB 901047A GB 625990 A GB625990 A GB 625990A
Authority
GB
United Kingdom
Prior art keywords
base member
condenser
electrolyte
potential
current
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
GB9010/47A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International 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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB625990A publication Critical patent/GB625990A/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 Methods And Accessories (AREA)

Abstract

625,990. Electroplating. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 2, 1947, No. 9010. Convention date, Sept. 29, 1945. [Class 41] A process of electrodepositing metal on a base member from an electrolyte comprises passing an electric current through the electrolyte with the base member as cathode, then discharging through the electrolyte a condenser charged with a potential opposite to and higher than the cathodic current potential, and repeating the cycle of operations until a desired thickness of metal has been electrodeposited on the base member. The condenser prior to discharge is preferably charged to a potential above 100 volts. As shown, a base member 20 and an electrode 24 in a tank 10 containing electrolyte 14, are suspended by hangers from conductors 16, 22, the conductor 16 being connected alternately by a switch 32 to a direct current source 26, and to a circuit containing a source 40 of current at high voltage and a condenser 34. A high resistance 42 and a variable resistance 44 are provided in the condenser circuit. The invention may be used in electrodepositing various metals, copper, silver, zinc and brass being specifically mentioned, cyanide baths being used in the case of copper, silver and brass.
GB9010/47A 1945-09-29 1947-04-02 Improvements in or relating to electroplating Expired GB625990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US619404A US2575712A (en) 1945-09-29 1945-09-29 Electroplating

Publications (1)

Publication Number Publication Date
GB625990A true GB625990A (en) 1949-07-07

Family

ID=24481786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9010/47A Expired GB625990A (en) 1945-09-29 1947-04-02 Improvements in or relating to electroplating

Country Status (2)

Country Link
US (1) US2575712A (en)
GB (1) GB625990A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214520A (en) * 1988-01-27 1989-09-06 Jct Controls Ltd Electrochemical processes using independently controlled voltages in alternation

Families Citing this family (11)

* 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
US2763606A (en) * 1952-06-25 1956-09-18 American Brake Shoe Co Electrodepositing baths and plating methods
US2826538A (en) * 1955-05-03 1958-03-11 Columbia Broadcasting Syst Inc Metal blackening process
US2933675A (en) * 1956-12-28 1960-04-19 Gen Dynamics Corp Chemical milling control
US2951978A (en) * 1957-05-29 1960-09-06 Thor P Ulvestad Reverse pulse generator
US3190177A (en) * 1958-04-15 1965-06-22 Edward K Kaprelian Electrochemical shutters
US3245313A (en) * 1961-02-23 1966-04-12 Philco Corp Light modulating means employing a self-erasing plating solution
US3282821A (en) * 1962-06-13 1966-11-01 Ibm Apparatus for making precision resistors
US3833481A (en) * 1972-12-18 1974-09-03 Buckbel Mears Co Electroforming nickel copper alloys
US4396467A (en) * 1980-10-27 1983-08-02 General Electric Company Periodic reverse current pulsing to form uniformly sized feed through conductors
US4561949A (en) * 1983-08-29 1985-12-31 Olin Corporation Apparatus and method for preventing activity loss from electrodes during shutdown

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1260661A (en) * 1917-09-04 1918-03-26 British America Nickel Corp Ltd Method of recovering metals from alloys.
US1428050A (en) * 1920-04-21 1922-09-05 Nickum Walter Daniel Electrolytic apparatus and method of depolarizing the same
US1534709A (en) * 1924-05-17 1925-04-21 Francis A Holt Method of conducting electrolytic operations
US1712284A (en) * 1925-12-17 1929-05-07 Lawrence C Turnock Method and apparatus for electrodeposition
US1785389A (en) * 1929-01-14 1930-12-16 Robert J Piersol Process for controlling electroplating
US2063760A (en) * 1931-09-10 1936-12-08 Schulein Joseph Bath for and process of electrodeposition of metal
US2181773A (en) * 1937-01-12 1939-11-28 Du Pont Brass plating
NL69965C (en) * 1945-08-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214520A (en) * 1988-01-27 1989-09-06 Jct Controls Ltd Electrochemical processes using independently controlled voltages in alternation

Also Published As

Publication number Publication date
US2575712A (en) 1951-11-20

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