Patent ID: 6036833
Filing Date: 2000-03-14
Classification: C25D

Abstract:
An electroplating method comprising forming platings of nickel in a chloride-sulfate-boric acid electrodepositing bath by employing pulse plating with periodic reverse pulsating current made up of cathodic cycles, each of a duration T.sub.K of from 2.5 to 2000 msec. at a pulsating or uniform cathodic current density I.sub.K of 0.1-16 A/dm.sup.2 alternating with anodic cycles, each of a duration T.sub.A of from 0.5 to 80 msec. at an anodic current density I.sub.A of 0.15-80 A/dm.sup.2, wherein the electrodepositing bath contains sulfonated naphthalene as an additive in an amount of 0.1 to 10 g/l and the anodic current density I.sub.A at least 1.5 times the cathodic current density I.sub.K.