Abstract: A device for electrolytic production of elemental magnesium by electrolysis of magnesium chloride in a molten salt bath, including a magnesium transfer trough comprising a semicircular section of a standard steel pipe mounted straddling the upper edge of a steel cathode plate, with cross slots for utilization of the full channel, the trough everywhere curving away from its nearest approach to the anode surface, to minimize production of unwanted magnesium on its exterior surface. The method entails the use of a destructible spacer for placing the anode accurately in place between a pair of opposing cathode plates.

Abstract: In the continuous electrodeposition of chromium metal and chromium oxide on metal surfaces the codeposition of chromium and its oxide, inert and insoluble, is obtained from the same bath and at high current density, by using a number of cycles of impressed cathodic current and defined ranges of electrolyte velocities in the deposition cell. In this manner a product is obtained wherein a specific quantitative relationship between chromium metal and chromium oxide ensures corrosion resistance superior to that obtainable in known products.

Abstract: Capacitance of anodized aluminum foil is increased by treating the foil after etching but before anodizing with an aqueous solution of a salt of valve metal, the oxide of which has a dielectric constant of at least about 20 and heating the foil to convert the salt to an oxide.