| abstract |
An electrode for use in an electroviscous fluid comprises a metallic electrode member (1), e.g. of copper, usually in the form of a plate or film, covered with an electrically insulating layer (2), of organic or inorganic material, e.g. of a baked drying oil, tetrabutyl titanate, silicon nitride, alumina or p.t.f.e., resistant to the fluid at a temperature up to 150 DEG C, and of thickness 0.01 to 50 mu m. A variety of coating methods can be used. A pair of parallel metallic films (Figs 3-4) can be put on each side of a central insulating support, e.g. of plastics or ceramic, and enclosed in insulating material. An electrical contact (4) extends from one corner of the metal beyond the insulation, for connection to a power source. The insulation reduces corrosion of the electrode when used in an electroviscous liquid, and the life of the liquid is extended. |