GB676565A - Improvements in current reversal electroplating - Google Patents

Improvements in current reversal electroplating

Info

Publication number
GB676565A
GB676565A GB7457/50A GB745750A GB676565A GB 676565 A GB676565 A GB 676565A GB 7457/50 A GB7457/50 A GB 7457/50A GB 745750 A GB745750 A GB 745750A GB 676565 A GB676565 A GB 676565A
Authority
GB
United Kingdom
Prior art keywords
electroplating
time
seconds
period
cathodic
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
GB7457/50A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB676565A publication Critical patent/GB676565A/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
    • C25D5/627—Electroplating characterised by the visual appearance of the layers, e.g. colour, brightness or mat appearance

Abstract

676,565. Electroplating processes. DU PONT DE NEMOURS & CO., E. 1. March 24, 1950 [July 18, 1949], No. 7457/50. Class 41. A process for electroplating includes electrolysing an electrolyte at substantially constant current density and periodically reversing the direction of current flow, so that a metal article to be plated alternately becomes cathodic for a period of time not less than 50 seconds and not more than 120 seconds and anodic for a period of time equal to 5 to 75 per cent of the preceding cathodic time. The process may be used for electroplating a base metal with copper, the electrolyte including an aqueous copper cyanide solution. Specification 630,165 is referred to.
GB7457/50A 1949-07-18 1950-03-24 Improvements in current reversal electroplating Expired GB676565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US676565XA 1949-07-18 1949-07-18

Publications (1)

Publication Number Publication Date
GB676565A true GB676565A (en) 1952-07-30

Family

ID=22077483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7457/50A Expired GB676565A (en) 1949-07-18 1950-03-24 Improvements in current reversal electroplating

Country Status (1)

Country Link
GB (1) GB676565A (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

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

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