GB794930A - Improvements in or relating to methods of electro-depositing metal - Google Patents

Improvements in or relating to methods of electro-depositing metal

Info

Publication number
GB794930A
GB794930A GB33834/55A GB3383455A GB794930A GB 794930 A GB794930 A GB 794930A GB 33834/55 A GB33834/55 A GB 33834/55A GB 3383455 A GB3383455 A GB 3383455A GB 794930 A GB794930 A GB 794930A
Authority
GB
United Kingdom
Prior art keywords
plating
deplating
periods
period
intervals
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
GB33834/55A
Inventor
Louis Edward Quintrell Walker
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB33834/55A priority Critical patent/GB794930A/en
Publication of GB794930A publication Critical patent/GB794930A/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
    • C25D5/60—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
    • C25D5/18—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
    • C25D5/623—Porosity of the 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

Abstract

794,930. Periodic reverse plating. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 7, 1956 [Nov. 25, 1955], No. 33834/55. Drawings to Specification. Class 41. In periodic reverse plating of a member, especially with copper from a cyanide bath, in which intervals occur between every plating and deplating period, A.C. is passed through the member at least during the interval between a deplating period and the following plating period. A.C. may be passed during intervals between the plating and following deplating periods as well, and also during said periods to give a rippling unidirectional current. The plating and deplating periods may be 35 and 15 seconds respectively with intervals of 5 seconds and the deplating voltage may be greater than the plating voltage. The A.C. may be provided throughout the cycle from a single source and the cycle is produced by switches operated by cams on a continuously driven shaft.
GB33834/55A 1955-11-25 1955-11-25 Improvements in or relating to methods of electro-depositing metal Expired GB794930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33834/55A GB794930A (en) 1955-11-25 1955-11-25 Improvements in or relating to methods of electro-depositing metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33834/55A GB794930A (en) 1955-11-25 1955-11-25 Improvements in or relating to methods of electro-depositing metal

Publications (1)

Publication Number Publication Date
GB794930A true GB794930A (en) 1958-05-14

Family

ID=10358057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33834/55A Expired GB794930A (en) 1955-11-25 1955-11-25 Improvements in or relating to methods of electro-depositing metal

Country Status (1)

Country Link
GB (1) GB794930A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166582B (en) * 1959-05-27 1964-03-26 Siemens Ag Device for the galvanic production of coatings on a base body
US3282821A (en) * 1962-06-13 1966-11-01 Ibm Apparatus for making precision resistors
GB2214520A (en) * 1988-01-27 1989-09-06 Jct Controls Ltd Electrochemical processes using independently controlled voltages in alternation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1166582B (en) * 1959-05-27 1964-03-26 Siemens Ag Device for the galvanic production of coatings on a base body
US3282821A (en) * 1962-06-13 1966-11-01 Ibm Apparatus for making precision resistors
GB2214520A (en) * 1988-01-27 1989-09-06 Jct Controls Ltd Electrochemical processes using independently controlled voltages in alternation

Similar Documents

Publication Publication Date Title
GB630165A (en) Improvements in or relating to electroplating
GB794930A (en) Improvements in or relating to methods of electro-depositing metal
JPS53106348A (en) Electrolytic bath for chromium plating
NO872114D0 (en) ACID BATH FOR GOLD ELECTROLYTIC COATING.
FR2407186A1 (en) FLEXIBLE GRAPHITE LAMINATED FABRIC AND METHOD FOR ITS MANUFACTURING
ES445868A1 (en) Zinc plating method
GB1279141A (en) A process for the electrodeposition of gold-copper-cadmium alloy coatings
GB625989A (en) Improvements in or relating to electroplating
ES315147A1 (en) Method of electrolytically depositing a placement of a tin alloy and bismuto. (Machine-translation by Google Translate, not legally binding)
JPS52140403A (en) Amorphous alloy and its production method
GB1040186A (en) Improvements in or relating to a power supply for electro plating
GB1034750A (en) Bath for electroless deposition of cobalt-iron-phosphorus alloy
GB1333259A (en) Process for the treatment of decarburised steel to make it suitable for enamelling
GB676565A (en) Improvements in current reversal electroplating
JPS52120704A (en) Individual selection call receiver
JPS53134738A (en) Method of plating single surface with melted metal
KARUPPANAN et al. MEASUREMENT OF THE THICKNESS OF ELECTROPLATES BY ELECTROLYTIC STRIPPING METHOD: STRIPPING SOLUTIONS FOR SILVER OVER COPPER, BRASS, MILD STEEL AND NICKEL
JPS52136803A (en) Equipment for recovering metal electrolytically
GB1065625A (en) Electrodeposition of nickel
GB1070683A (en) Improvements in or relating to the electro-deposition of gold alloys
JPS53115676A (en) Cathod for use in electrolysis
GB626665A (en) Improvements in devices for carrying capes or other articles on cycles and the like
GB656602A (en) Electroplating method and electrolyte
GB868064A (en) Extrusion and drawing of beryllium
JOHNSON et al. PHYSICAL AND MECHANICAL PROPERTIES OF ELECTRODEPOSITED COPPER III. DEPOSITS FROM SULFATE, FLUOBORATE, PYROPHOSPHATE, CYANIDE, AND AMINE BATHS