Zinc-nickel alloy electroplating process

Chemistry: electrical and wave energy – Processes and products

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204 43Z, C25D 356, C25D 548

Patent

active

043881602

ABSTRACT:
An acid electroplating process is disclosed for codepositing zinc and nickel to provide bright lustrous ductile zinc-nickel alloy electrodeposits containing no more than a few percent by weight of nickel which deposits have good receptivity to chromate conversion coatings and which, after post treatment, have drastically improved corrosion resistance. The preferred plating baths as disclosed include a soluble zinc salt, a soluble nickel salt, an ammonium salt, an alkali metal salt, a nonionic polyoxyalkylated surfactant, and an aromatic aldehyde. The plating bath can be free of ammonium ions when it contains boric acid and an aromatic carbonyl compound.

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J. W. Dini et al., Metal Finishing, pp. 31-33, Aug. 1979.
J. W Dini et al., Metal Finishing, pp. 53-57, Sep. 1979.

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