Global Patent Index - EP 1240364 A2

EP 1240364 A2 2002-09-18 - METAL-BASED ANODES FOR ALUMINIUM ELECTROWINNING CELLS

Title (en)

METAL-BASED ANODES FOR ALUMINIUM ELECTROWINNING CELLS

Title (de)

ANODEN AUF BASIS VON METALLEN FÜR ELEKTROLYSEZELLEN ZUR ALUMINIUMGEWINNUNG

Title (fr)

ANODES A BASE METALLIQUE POUR CELLULES D'EXTRACTION ELECTROLYTIQUE D'ALUMINIUM

Publication

EP 1240364 A2 (EN)

Application

EP 00977813 A

Priority

  • IB 0001814 W
  • IB 9901977 W

Abstract (en)

[origin: WO0142534A2] An anode of a cell for the electrowinning of aluminium comprises a nickel-iron alloy substrate having a nickel metal rich outer portion with an electrolyte pervious integral nickel-iron oxide containing surface layer which adheres to the nickel metal rich outer portion of the nickel-iron alloy and which in use is electrochemically active for the evolution of oxygen. The oxide surface layer has a thickness such that, during use, the voltage drop therethrough is below the potential of dissolution of nickel-iron oxide. The nickel metal rich outer portion may contain cavities some or all of which, after oxidation, are partly or completely filled with iron oxides to form iron oxide containing inclusions.

IPC 1-7 (main, further and additional classification)

C25C 3/12; C25C 3/06

IPC 8 full level (invention and additional information)

C25C 3/12 (2006.01)

CPC (invention and additional information)

C25C 3/12 (2013.01)

Citation (search report)

See references of WO 0142534A3

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family

WO 0142534 A2 20010614; WO 0142534 A3 20020117; AT 290106 T 20050315; AU 1544401 A 20010618; CA 2393426 A1 20010614; DE 60018464 D1 20050407; DE 60018464 T2 20050728; EP 1240364 A2 20020918; EP 1240364 B1 20050302; ES 2234697 T3 20050701; NO 20022714 A 20020607; NO 20022714 D0 20020607