Process for the preparation of low hydrogen overvoltage cathodes

Details Process for the preparation of low hydrogen overvoltage cathodes Process for the preparation of low hydrogen overvoltage cathodes

1979-08-02

1980-09-09

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 23, 204 35R, 204290R, C25B 116, C25B 126, C25B 1102, C25B 1103

Patent

active

042216435

ABSTRACT:
An improved process is described for the electrodeposition of both a low overvoltage metal and a sacrificial metal onto an electrically conductive substrate. The sacrificial metal is later removed by leaching the electroplated substrate with sodium hydroxide. The improvement comprises adding a sacrificial metal to the electroplating solution after electrodeposition is initiated. The amount of electric current supplied to the electroplating solution during electrodeposition may be increased or decreased to increase the surface area and the electrochemical activity of the electroplated substrate.

REFERENCES:
patent: 3291714 (1966-12-01), Hall et al.
patent: 4104133 (1978-08-01), Brannan
German Offenlegungsschrift No. 2,807,054, File No. P28 07 054.4, appln. date Feb. 18, 1978, disclosure date Aug. 24, 1978, "Electrode" Yoshio Oda et al.
Netherlands, appln. No. 75-07550, filed Jun. 15, 1975, laid open to inspection Jan. 20, 1976, "Electrolytic Cathode and Processes for the Manufacture Thereof".

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