Chemistry: electrical and wave energy – Processes and products
Patent
1978-05-22
1980-02-12
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204 57, C25D 542, C25D 906
Patent
active
041882695
ABSTRACT:
An electrode for use in electrolytic processes, e.g. as an energy storage electrode for a lead-dioxide accumulator or storage battery, is produced by subjecting a titanium support to a cleaning operation and subsequently to a surface treatment in a medium which is constituted by a titanium (IV) salt solution. This results in the formation of a titanium (IV) adsorbed layer onto which the lead dioxide active material is anodically deposited. An important characteristic of the invention is that the surface treatment is carried out such that hydrolysis of the titanium (IV) activated surface does not occur and hence the titanium at the surface of the support and the interface between the latter and the lead dioxide active material is in the tetravalent titanium state. The titanium deposit is from a titanium (IV) salt of an inorganic oxy acid, preferably perchloric acid, a salt of an organic acid, or a complex of the titanium (IV) ions with a complex former.
REFERENCES:
patent: 3935082 (1976-01-01), Fritz et al.
patent: 4019970 (1977-04-01), Fritz et al.
"Adhesion of Electroplated Coatings to Ti"by Connie L. Stanley & A. Brenner, 43rd Tech. Proceed., Amer. Electroplaters Soc., vol. 43, 1956, p. 123.
Andrews R. L.
Rheinisch-Westfalisches Elektrizitatswerk AG
Ross Karl F.
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