Bright nickel-iron alloy electroplating bath and process

Details Bright nickel-iron alloy electroplating bath and process Bright nickel-iron alloy electroplating bath and process

1982-08-23

1984-05-22

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 356

Patent

active

044500513

ABSTRACT:
An aqueous bath and process suitable for the electrodeposition of bright, high-leveling nickel-iron alloy deposits on a conductive substrate comprising controlled, effective amounts of nickel ions, iron ions, an iron solubilizing agent, a buffering agent, a primary brightening agent, hydrogen ions to provide a pH of about 2.6 to 4.5 and at least one bath soluble additive agent present in an amount of at least about 2 mg/l, selected from propargyl sulfonic acid, 1-butyne-3-sulfonic acid, 1-pentyne-5-sulfonic acid, 2-butyne-1-sulfonic acid and the alkali metal and ammonium salts thereof. A particularly preferred additive agent comprises propargyl sulfonic acid and the alkali metal and ammonium salts thereof. The invention further contemplates the use of the aforementioned additive agent as a replenishing agent for nickel-iron electroplating solutions and as a rejuvenating agent for restoring the activity and capacity of such aqueous baths to deposit bright, high-leveling nickel-iron alloy deposits.

REFERENCES:
patent: 2800440 (1957-07-01), Brown
patent: 3031386 (1962-04-01), Tsu et al.
patent: 3804726 (1974-04-01), Passal
patent: 3806429 (1974-04-01), Clauss et al.
patent: 3878067 (1975-04-01), Tremmel
patent: 3922209 (1975-11-01), Passal
patent: 3974044 (1976-08-01), Tremmel

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