Non-cyanide electroplating solution for gold or alloys thereof

Details Non-cyanide electroplating solution for gold or alloys thereof Non-cyanide electroplating solution for gold or alloys thereof

1992-07-10

1994-01-11

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Depositing predominantly alloy coating

205247, 205250, 205266, 205267, 106 126, 106 113, C25D 362

Patent

active

052777901

ABSTRACT:
Disclosed are cyanide free electroplating solutions for gold or alloys thereof; said solutions comprising gold in the form of a soluble sulfite complex, an added source of sulfite and/or bisulfite ion and a supporting electrolyte; and said solutions further comprising both an organic polyamine or mixture of polyamines of molecular weight from about 60 to 50,000, and an aromatic organic nitro compound; wherein the pH of said solutions is below about 6.5.

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patent: 4717459 (1988-01-01), Nakazawa et al.

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