GB2004303A - Oxygen-resistant electroconductive carbon anodes - Google Patents

Oxygen-resistant electroconductive carbon anodes

Info

Publication number
GB2004303A
GB2004303A GB7836756A GB7836756A GB2004303A GB 2004303 A GB2004303 A GB 2004303A GB 7836756 A GB7836756 A GB 7836756A GB 7836756 A GB7836756 A GB 7836756A GB 2004303 A GB2004303 A GB 2004303A
Authority
GB
United Kingdom
Prior art keywords
melt
oxygen
carbon base
refractory
pores
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.)
Granted
Application number
GB7836756A
Other versions
GB2004303B (en
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium AG
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 Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Publication of GB2004303A publication Critical patent/GB2004303A/en
Application granted granted Critical
Publication of GB2004303B publication Critical patent/GB2004303B/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes
    • C25C3/125—Anodes based on carbon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof
    • C25C7/025—Electrodes; Connections thereof used in cells for the electrolysis of melts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Improving the resistance to oxidation of an electroconductive body, including a carbon base (1) e.g. of graphite defining a surface having pores and carrying an adherent discontinuous surface coating (3) of a refractory oxide e.g. of alumina, chromic oxide or silica, by: immersing the body at least partially into a refractory metal salt melt, e.g. of cryolite or alkaline earth metal and aluminium chloride, having a boiling point in excess of 400 DEG C; electrodepositing said melt onto said body thereby closing practically all of those pores and discontinuities (2a- 2c,4a-4d, 5a, 5b) submerged in said melt; and removing said body from said melt before said refractory oxide has completely disintegrated or dissolved; to give a final oxidation agent- resistant coating which is keyed onto the surface of the carbon base. <IMAGE>
GB7836756A 1977-09-16 1978-09-14 Oxygen-resistant electroconductive carbon bodies Expired GB2004303B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1134777 1977-09-16

Publications (2)

Publication Number Publication Date
GB2004303A true GB2004303A (en) 1979-03-28
GB2004303B GB2004303B (en) 1982-09-02

Family

ID=4372612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836756A Expired GB2004303B (en) 1977-09-16 1978-09-14 Oxygen-resistant electroconductive carbon bodies

Country Status (5)

Country Link
AU (1) AU520961B2 (en)
DE (1) DE2744626A1 (en)
FR (1) FR2403398A1 (en)
GB (1) GB2004303B (en)
NO (1) NO783124L (en)

Also Published As

Publication number Publication date
NO783124L (en) 1979-03-19
GB2004303B (en) 1982-09-02
AU3967278A (en) 1980-03-13
FR2403398B1 (en) 1980-05-16
FR2403398A1 (en) 1979-04-13
DE2744626A1 (en) 1979-03-29
AU520961B2 (en) 1982-03-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee