An electrode for use in electric prevention for corrosion, the electrode comprising a sintered body of a mixture of iron oxide of 90 to 55 mol % in terms of Fe.sub.2 O.sub.3 and a metal oxide of 10 to 45 mol % in terms of MO (M is at least one metal selected from the group consisting of Mn, Ni, Co, Cu and Zn), and a process of electric prevention for corrosion by using said electrode as an anode.
An anode useful in corrosion protection comprising a metallic substrate having an applied layer thereon of a ferrite or a chromite, said layer having metallic electronic conductivity and a thickness of at least 10 mils (254 .mu.m).
A cathode for use in electrolysis comprising (1) a substrate of iron or an alloy thereof; (2) a compact interlayer of Fe.sub.3 O.sub.4 formed on the substrate, and (3) a coating of activating nickel comprising principally nickel or an alloy thereof formed on the Fe.sub.3 O.sub.4 layer. In another embodiment, the interlayer (2) may be heat-treated to convert a part of the interlayer (2) into a nickel ferrite. The cathode is especially suitable for use in the electrolysis of an alkali metal halide, such as sodium chloride, using an ion exchange membrane method.
A device for the treatment of selected solutions wherein the device is a sealed container including a chemical mixture therein, at least one of the ingredients being magnetite.
An electrode type steam vaporizer device is disclosed which includes a plurality of ferrite electrodes positioned in a water receptacle wherein AC voltage is applied to the electrodes thereby vaporizing water in the receptacle. Each of the ferrite electrodes is a sintered body made of a mixture of iron oxide and a divalent nickel oxide. The ferrite electrodes are contained in an electrode assembly located within the body of the water receptacle such that a pair of electrode terminals extend through the top wall of the receptacle. A cover having a power source connector receiving concavity in its surface is positioned on top on the water receptacle. The cover is rotatable between a first position where the concavity is in registry with the electrode terminals and a second position where the concavity is out of registry with the terminals. A power source connector is received in the concavity and is connectable with the electrode terminals only when the cover is in the first position. When the connector is attached to the device, the cover is trapped between the body of the water receptacle and the connector, thereby preventing the removal of the cover. Thus the receptacle may not be filled and the electrodes may not be cleaned unless the power connector is removed from the electrode terminals. Additionally, when not in use, the cover may be rotated to the second position whereby the electrode terminals are protected from dust accumulation.
A cathode for use in electrolysis comprising (1) a substrate of iron or an alloy thereof; (2) a compact interlayer of Fe.sub.3 O.sub.4 formed on the substrate, and (3) a coating of activating nickel comprising principally nickel or an alloy thereof formed on the Fe.sub.3 O.sub.4 layer. In another embodiment, the interlayer (2) may be heat-treated to convert a part of the interlayer (2) into a nickel ferrite. The cathode is especially suitable for use in the electrolysis of an alkali metal halide, such as sodium chloride, using an ion exchange membrane method.
