Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1984-06-27
1986-07-01
Niebling, John F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C25B 134, C25B 1104
Patent
active
045978468
ABSTRACT:
A depassivation layer is produced on an electrode for an electrochemical cell by applying one or more layers of a metal salt solution, containing the elements to be applied, to the substrate (1) which is to be coated and is in the form of a porous plate, by means of rolling an elastic roller (2) over the substrate, with the insertion of a solution carrier (3) in the form of felt or paper, and then drying the layer and subjecting it to a chemical/thermal treatment in air (heat treatment at 450.degree. C.). Good depassivation layers with a relatively small noble metal content can be produced in this way. The depassivation layer which, in the form of a homogeneous film, is at least partially coherent contains, as a finely divided, sub-microscopic mixture, electronically conductive sub-oxides/oxides of the substrate (1) in addition to noble metals
oble metal oxides, and it can also contain further components, such as SnO.sub.2.
REFERENCES:
patent: 3926773 (1975-12-01), Koziol
patent: 3933616 (1976-01-01), Beer
patent: 4326943 (1982-04-01), Banziger
patent: 4392927 (1983-07-01), Fabian
patent: 4471006 (1984-09-01), Asano
Killer Eric
Scherer Gunther
BBC Brown Boveri & Company Ltd.
Niebling John F.
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