BRIGHT NICKEL-IRON ALLOY ELECTROPLATING BATH AND PROCESS

摘要

Abstract of the DisclosureAn aqueous bath and process suitable for theelectrodeposition of bright, high-leveling nickel-iron alloy deposits on a conductive substrate comprisingcontrolled, effective amounts of nickel ions, ironions, an iron solubilizing agent, a buffering agent,a primary brightening agent, hydrogen ions to providea pH of about 2.6 to 4.5 and a bath soluble additiveagent present in an amount of at least about 2 mg/lof the structural formula:A particularly preferred additive agent comprisespropargyl sulfonic acid and the alkali metal andammonium salts thereof. The invention further con-templates the use of the aforementioned additive agentas a replenishing agent for nickel-iron electro-plating solutions and as a rejuvenating agent forrestoring the activity and capacity of such aqueousbaths to deposit bright, high-leveling nickel-ironalloy deposits.