Electrochemical cell for measuring hydrogen in metal

Details Electrochemical cell for measuring hydrogen in metal Electrochemical cell for measuring hydrogen in metal

1979-06-25

1980-09-09

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204195F, G01N 2746

Patent

active

042216516

ABSTRACT:
A cell is provided which utilizes the electrochemical permeation technique to determine the hydrogen content of a metal. The working face of the cell has an opening into a cavity within the cell. A sponge for holding electrolyte fits in the cavity and an anode extends into the cavity. A contact is provided on the working face for contacting the metal being measured. When the cell is held against the metal being measured by the magnet which encloses the cell, a current caused by the oxidation of hydrogen permeating from the metal flows between the anode and the contact electrode. A circuit is provided to measure this hydrogen oxidation current and to calculate the hydrogen content based upon diffusion equations. A seal formed around the opening prevents leakage of electrolyte during the measurement and defines the area being measured. The potential between a special reference electrode positioned in the cavity and the anode is measured to determine if the anode is properly charged and to confirm that sufficient electrolyte is present in the cavity.

REFERENCES:
patent: 1739657 (1929-12-01), Shemitz
patent: 2463711 (1949-03-01), Nagle
patent: 2540602 (1951-02-01), Thomas et al.
patent: 2886497 (1959-05-01), Butler
patent: 4065373 (1977-12-01), Martin

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