GB704953A - Improvements in or relating to processes of electrolytic polishing of metals - Google Patents

Improvements in or relating to processes of electrolytic polishing of metals

Info

Publication number
GB704953A
GB704953A GB1657150A GB1657150A GB704953A GB 704953 A GB704953 A GB 704953A GB 1657150 A GB1657150 A GB 1657150A GB 1657150 A GB1657150 A GB 1657150A GB 704953 A GB704953 A GB 704953A
Authority
GB
United Kingdom
Prior art keywords
article
film
chromic
acids
acid
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
GB1657150A
Inventor
Hubert Laurence Turner
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.)
WER MVL 1998 Ltd
Original Assignee
Ever Ready Co Great Britain 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 Ever Ready Co Great Britain Ltd filed Critical Ever Ready Co Great Britain Ltd
Priority to GB1657150A priority Critical patent/GB704953A/en
Publication of GB704953A publication Critical patent/GB704953A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

A process of producing a smooth lustrous surface on articles, for example, electric torch cases, of aluminium or aluminium-rich alloys, consists in immersing the article at an elevated temperature in an electrolyte containing phosphoric acid, sulphuric acid, an organic substance within the group consisting of aliphatic-polyhydric alcohols and ether alcohols soluble in phosphoric acid, and water, for a short period without the application of a voltage, whereby etching is effected, and then subjecting the immersed article to direct current voltage, the article being made anode in the bath. The alcohol may be an alkylene glycol or ether thereof having a boiling point above 120 DEG C. After the polishing process the article may be immersed in a solution of caustic soda, in a mixture of chromic anc phosphoric acids or chromic and sulphuric acids, or in solutions of the salts of these acids, to remove surface film, the article thereafter being anodized in a bath containing chromic acid to obtain an opaque film or sulphuric acid to obtain a transparent film. The film may be dyed and sealed by immersion in hot water.
GB1657150A 1950-07-03 1950-07-03 Improvements in or relating to processes of electrolytic polishing of metals Expired GB704953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1657150A GB704953A (en) 1950-07-03 1950-07-03 Improvements in or relating to processes of electrolytic polishing of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1657150A GB704953A (en) 1950-07-03 1950-07-03 Improvements in or relating to processes of electrolytic polishing of metals

Publications (1)

Publication Number Publication Date
GB704953A true GB704953A (en) 1954-03-03

Family

ID=10079707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1657150A Expired GB704953A (en) 1950-07-03 1950-07-03 Improvements in or relating to processes of electrolytic polishing of metals

Country Status (1)

Country Link
GB (1) GB704953A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396470A (en) * 1980-10-23 1983-08-02 Vickers P.L.C. Lithographic printing plates
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396470A (en) * 1980-10-23 1983-08-02 Vickers P.L.C. Lithographic printing plates
GB2121073A (en) * 1982-04-07 1983-12-14 Pyrene Chemical Services Ltd Aqueous fluoride-free aluminium cleaning composition

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