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

C - Chemistry, Metallurgy

25

D

204/26.5

C25D 3/56 (2006.01) C25D 21/18 (2006.01)

Patent

CA 1193223

Abstract of the Disclosure 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 a bath soluble additive agent present in an amount of at least about 2 mg/l of the structural formula: Image A particularly preferred additive agent comprises propargyl sulfonic acid and the alkali metal and ammonium salts thereof. The invention further con- templates the use of the aforementioned additive agent as a replenishing agent for nickel-iron electro- plating 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.

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