Electrochemical depyrophorization of raney nickel electrodes

Details Electrochemical depyrophorization of raney nickel electrodes Electrochemical depyrophorization of raney nickel electrodes

1982-04-30

1983-11-15

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204290R, 204293, C23F 1300, C25B 1100

Patent

active

044154160

ABSTRACT:
An electrochemical oxidation treatment for monolithic cathode structures having a Beta phase Raney nickel alloy surface thereon is disclosed. When a freshly leached structure is made the anode in an electrochemical cell, which is operated at a current density of between about 40 and about 60 mA/cm.sup.2 until the polarization voltage is reduced from the open circuit value of about -1250 mV by about 500 to about 700 mV, the treated structure is free of subsequent problems with pyrophoricity. Cathodic structures treated this way show substantially no difference in hydrogen overvoltage characteristics and long-term stabilities when compared to chemically depyrophoricized materials of the same composition and structure.

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