Abstract: Anode, especially for the electrowinning of metals and metal compounds, formed of titanium alloy containing 0.5 to 5% nickel, 1 to 10% manganese and the remainder titanium.

Abstract: The disclosure relates to activated metal anodes consisting essentially of zirconium, niobium, tantalum or titanium and having its surface area activated by means of metallic manganese; the manganese content at the anode surface area of more than 16 weight % decreases towards the interior of the anode, reaching 0 weight % along a path corresponding to 1/4 of the thickness of the anode material, measured from the anode surface area.The disclosure also relates to a process for making these metal anodes.

Abstract: Coating a porous electrode for electrochemical processes with an activation layer which covers the electrode surface at least in part and contains metals or compounds of metals of the platinum group by:(a) coating with a suspension containing particles of a metal of the platinum group and a dispersion agent in which the particles will dissolve at an elevated temperature,(b) heating the coated electrode to dissolve the particles,(c) heating the electrode to evaporate the agent, decompose the compound and deposit a layer of the metal of the platinum group on the electrode surface,(d) repeating the cycle to obtain a layer of desired thickness,(e) heating the electrode in an oxygen-containing atmosphere to a temperature between 400.degree. and 600.degree. C.

Abstract: Sintered electrode especially for use in electrowinning formed of a corrosion-resistant carrier consisting at least in part of sintered TiO.sub.x, wherein x=0.25 to 1.5, and a coating of manganese dioxide covering at least part of the surface of the carrier.