Zinc-nickel alloy plating bath and plating method
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United States of America Patent
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Aug 29, 1989
Grant Date -
N/A
app pub date -
Feb 21, 1989
filing date -
Feb 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a zinc-nickel alloy plating bath comprising about 3 to about 30 g/l of Zn ion, about 0.2 to about 20 g/l of Ni ion, about 20 to about 300 g/l of alkali hydroxide, about 0.05 to about 10 g/l of amino-alcohol polymer, an Ni-complexing agent in an amount of about 1 to about 20 moles per mole of Ni ion, and about 0.01 to about 20 g/l of amino acid and/or a salt of amino acid, the bath having a pH of 11 or more.
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