GB770503A - Method of electro plating on aluminum and its alloys - Google Patents

Method of electro plating on aluminum and its alloys

Info

Publication number
GB770503A
GB770503A GB1220355A GB1220355A GB770503A GB 770503 A GB770503 A GB 770503A GB 1220355 A GB1220355 A GB 1220355A GB 1220355 A GB1220355 A GB 1220355A GB 770503 A GB770503 A GB 770503A
Authority
GB
United Kingdom
Prior art keywords
acid
nickel
aluminium
metal
solution
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
GB1220355A
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.)
DICK CLELAND
Original Assignee
DICK CLELAND
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 DICK CLELAND filed Critical DICK CLELAND
Priority to GB1220355A priority Critical patent/GB770503A/en
Publication of GB770503A publication Critical patent/GB770503A/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

Abstract

770,503. Electroplating on anodized aluminium. MACLEAN, W. D., and CLELAND, D. April 27, 1955, No. 12203/55. Class 41. Prior to electroplating, the oxide film produced on aluminium or aluminium-base alloys is subjected to the action of an aqueous solution consisting of sodium hydroxide and sodium silicate. Preferably after degreasing, e.g. with caustic soda, and pickling in dilute hydrofluoric acid, anodizing is effected by A.C. or reversing D.C. at 25 amps/sq. ft., using an aqueous solution of oxalic acid and the oxide film is then treated with a solution containing 8 ozs, caustic soda and 6 ozs. sodium silicate per gallon. Plating with any metal may then be effected from a cyanide bath while silver, copper, zinc, cadmium, tin, iron, cobalt, and nickel or any metal having a soluble fluoride may be deposited from a fluoride-contaiing bath. Typically, boric and hydrofluoric acids are mixed and the resulting fluoboric acid is neutralized with triethanolamine to form a first solution, while a second solution is formed from nickel (or other specified metal) carbonate. hydrofluoric acid and a small amount of ammonium fluoride, the two solutions being mixed to form the plating bath and the pH being adjusted with hydrofluoric acid or triethanolamine. Alkaline baths may be heated and so operated at high current densities but acid baths remain clearer. Bright ductile flexible soft deposits are obtained, especially with nickel.
GB1220355A 1955-04-27 1955-04-27 Method of electro plating on aluminum and its alloys Expired GB770503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1220355A GB770503A (en) 1955-04-27 1955-04-27 Method of electro plating on aluminum and its alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1220355A GB770503A (en) 1955-04-27 1955-04-27 Method of electro plating on aluminum and its alloys

Publications (1)

Publication Number Publication Date
GB770503A true GB770503A (en) 1957-03-20

Family

ID=10000228

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1220355A Expired GB770503A (en) 1955-04-27 1955-04-27 Method of electro plating on aluminum and its alloys

Country Status (1)

Country Link
GB (1) GB770503A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374155A (en) * 1965-02-19 1968-03-19 Ludwig J. Weber Modified oxide-coated aluminum and the method of modifying

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374155A (en) * 1965-02-19 1968-03-19 Ludwig J. Weber Modified oxide-coated aluminum and the method of modifying

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