Abstract

The electrodeposition of rhenium‐nickel alloys from an ammoniacal citrate bath and from nickel plating baths containing potassium perrhenate is described. The ammoniacal citrate bath was used to determine the effects of such factors as bath composition, bath pH, bath temperature, and current density on cathode current efficiency and alloy composition. A plating solution which gave a cathode deposit with a high percentage of rhenium contained 56 g/l of nickel sulfate hexahydrate, 10 g/l of potassium perrhenate, 66 g/l of citric acid, and ammonium hydroxide to a pH of about 8. When this solution was electrolyzed at 5 amp/dm2 and 70°C it gave a cathode deposit containing approximately 78 per cent rhenium with a cathode current efficiency of about 90 per cent. Some of the properties of electrodeposited rhenium‐nickel alloys are also reported.

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