GB593763A - Improvements in or relating to processes for covering the surfaces of aluminium or aluminium alloy articles with adherent and protective metallic coatings - Google Patents

Improvements in or relating to processes for covering the surfaces of aluminium or aluminium alloy articles with adherent and protective metallic coatings

Info

Publication number
GB593763A
GB593763A GB10818/45A GB1081845A GB593763A GB 593763 A GB593763 A GB 593763A GB 10818/45 A GB10818/45 A GB 10818/45A GB 1081845 A GB1081845 A GB 1081845A GB 593763 A GB593763 A GB 593763A
Authority
GB
United Kingdom
Prior art keywords
aluminium
copper
zinc
deposited
cadmium
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
GB10818/45A
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.)
Galvanostegie Almeta SA De
Original Assignee
Galvanostegie Almeta SA De
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 Galvanostegie Almeta SA De filed Critical Galvanostegie Almeta SA De
Publication of GB593763A publication Critical patent/GB593763A/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
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
    • C25D5/44—Aluminium

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

593,763. Electroplating aluminium. SOC. ANON. DE GALVANOSTEGIE ALMETA. April 30, 1945, No. 10818. Convention date, April 24, 1944. [Class 41] In plating aluminium or aluminium alloy, grease and any trace of oxide are first removed, a porous layer of nickel is then deposited by electrolysis followed by at least one layer of cadmium or zinc. This may be followed by one or more layers of another metal, e.g. copper, nickel, chromium, silver, gold. The surface preparation may be that described in Specification 593,762 which comprises degreasing, removing the oxide skin, lightly plating with copper and dissolving the copper film in an acid bath. The nickel layer of .003 to .01 m. is deposited in a bath having a pH of 5.6 to 6 containing nickel sulphate, boracic acid and some magnesium or sodium sulphate to improve the conductivity. Cadmium may be deposited to a thickness of .02 mm. from a 0.2-0.6 normal solution of cadmium cyanide or acetate containing also potassium cyanide and dextrine or gelatine having a pH of about 10. Zinc may be deposited from a bath containing zinc and potassium cyanides, sodium hydroxide and dextrine at a temperature of 30-50‹ C., or from a bath containing zinc and ammonium sulphates, potassium aluminium sulphate and gum arabic. An article for use as an electric contact is plated on the cadmium or zinc layer with copper in a bath containing per litre of water 200-250 grms. of copper sulphate and 150-250 grm. of sulphuric acid.
GB10818/45A 1944-04-24 1945-04-30 Improvements in or relating to processes for covering the surfaces of aluminium or aluminium alloy articles with adherent and protective metallic coatings Expired GB593763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH593763X 1944-04-24

Publications (1)

Publication Number Publication Date
GB593763A true GB593763A (en) 1947-10-24

Family

ID=4522290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10818/45A Expired GB593763A (en) 1944-04-24 1945-04-30 Improvements in or relating to processes for covering the surfaces of aluminium or aluminium alloy articles with adherent and protective metallic coatings

Country Status (2)

Country Link
FR (1) FR910537A (en)
GB (1) GB593763A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676917A (en) * 1952-05-15 1954-04-27 Rockwell Spring & Axle Co Method of making corrosion resistant articles having a bright surface
US2858520A (en) * 1955-01-03 1958-10-28 Chance Co Ab Electrical connector
GB2138025A (en) * 1983-04-13 1984-10-17 Furukawa Electric Co Ltd Silver-coated electric materials and a method for their production
CN104040035A (en) * 2011-12-22 2014-09-10 Om产业股份有限公司 Plated Article And Manufacturing Method Therefor
CN105247111A (en) * 2013-10-25 2016-01-13 Om产业股份有限公司 Method for producing plated article

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676917A (en) * 1952-05-15 1954-04-27 Rockwell Spring & Axle Co Method of making corrosion resistant articles having a bright surface
US2858520A (en) * 1955-01-03 1958-10-28 Chance Co Ab Electrical connector
GB2138025A (en) * 1983-04-13 1984-10-17 Furukawa Electric Co Ltd Silver-coated electric materials and a method for their production
CN104040035A (en) * 2011-12-22 2014-09-10 Om产业股份有限公司 Plated Article And Manufacturing Method Therefor
CN104040035B (en) * 2011-12-22 2017-05-03 Om产业股份有限公司 Plated Article And Manufacturing Method Therefor
CN105247111A (en) * 2013-10-25 2016-01-13 Om产业股份有限公司 Method for producing plated article
CN105247111B (en) * 2013-10-25 2017-09-12 Om产业股份有限公司 The manufacture method of plating product
US9783902B2 (en) 2013-10-25 2017-10-10 Om Sangyo Co., Ltd. Method for producing plated article

Also Published As

Publication number Publication date
FR910537A (en) 1946-06-11

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