Title:
CATHODE FOR ELECTROLYSIS OF ALKALI HALIDE
Document Type and Number:
Japanese Patent JPS54152697
Kind Code:
A
Abstract:
PURPOSE:To provide the title cathode with high durability and low hydrogen overvoltage by mechanically roughening and activating the surface of a substrate made of copper or copper alloy and by coating the roughened surface with Rh or Rh alloy. CONSTITUTION:The surface of a substrate made of copper or copper alloy such as copper-Ni or copper-iron is mechanically ground with an abrasive material such as Al2 O3 or Fe2O3. The diameter of the abrasive material is pref. in the range of 0.1-1000, esp. 1-200 mu. The roughened substrate surface is coated with Rh or Rh alloy as usual by Rh salt thermal decomposition baking, electroplating, electroless plating or the like. The coated surface is then heat treated in a reducing or inert gas atmosphere of above 200 deg.C to further enhance the durability. Thus, a characteristic cathode is obtd. utilizing Rh, to the utmost limit, showing the min. hydrogen overvoltage in caustic alkali.
Inventors:
KAZUTOMO MASAKATSU
FUKUDA MAKOTO
SUZUKI SHIROU
FUKUDA MAKOTO
SUZUKI SHIROU
Application Number:
JP6104478A
Publication Date:
December 01, 1979
Filing Date:
May 24, 1978
Export Citation:
Assignee:
KUREHA CHEMICAL IND CO LTD
International Classes:
C25B1/46; C25B11/04; C25B11/08; (IPC1-7): C25B1/46; C25B11/06