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US 4,048,023 AGranted
Electrodeposition of gold-palladium alloys
AssigneeOxy Metal Industries Corporation
InventorPeter Stevens
Life of this patent
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Abstract
A slightly alkaline gold plating solution, free of cyanide and phosphates, contains a sodium gold sulfite complex and a palladosamine chloride complex.
Claims8
In an aqueous gold electroplating bath, free of cyanides and containing about 1 to 50 g/l of gold as an alkali metal gold sulfite and about 0.05 to 10 g/l of palladium as a complex, the improvement which comprises employing palladosamine chloride as the palladium complex and wherein said bath is buffered to a pH within the range of about 5.5 to 11.
Dependencies are inferred from the claim text.