Chemistry: electrical and wave energy – Processes and products
Patent
1981-12-21
1984-09-11
Tung, T.
Chemistry: electrical and wave energy
Processes and products
204 1R, 422 13, 422 18, C25B 116, C23F 1118
Patent
active
044708904
ABSTRACT:
A method is provided for preventing the dissolution of transition metal-based cathodes used in chlor-alkali diaphragm cells by adding a small amount of a corrosion inhibitor, such as sodium silicate or trisodium phosphate, to the electrolytic solution during periods of interrupted current flow to the cell. The corrosion inhibitor is adsorbed on the surface of the cathode and forms an adherent protective film on the cathode. This film protects the cathode by preventing dissolution of the transition metal in the cathode coating due to oxidation by sodium hypochlorite.
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Uhlig, "Corrosion & Corrosion Control", 1963, pp. 224-232.
Bommaraju Tilak V.
Viswanathan Krishnan
Gosz William G.
Occidental Chemical Corporation
Tao James F.
Tung T.
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