Methods and electrolyte compositions for electrodepositing metal-carbon alloys
AssigneeThe United States of America as represented by the Secretary of Commerce
InventorsChristian E. Johnson, David Lashmore, Elaine Soltani
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Abstract
Methods for electrodepositing a metal-carbon coating on a substrate comprng immersing the substrate in an aqueous electrolyte, and passing a sufficient current through the electrolyte to effect electrolyte deposition of a metal-carbon alloy on the substrate. The aqueous electrolyte comprises from about 0.2 to about 0.6 mol/l of metal ions selected from the group consisting of iron, nickel, nickel-tungsten mixture and cobalt-tungsten mixture, greater than about 1.4 mol/l of an amidosulfonic acid or a salt thereof, ammonium ions, formic acid or a salt thereof, and water.
Claims21
A method for electrodepositing a metal-carbon alloy coating on a substrate, comprising immersing the substrate in an aqueous electrolyte, and passing a sufficient current through the electrolyte to effect deposition of a metal-carbon alloy coating on the substrate, the aqueous electrolyte comprising from about 0.2 to about 0.6 mol/l of ions of metal selected from the group consisting of iron, nickel, nickel-tungsten mixture, and cobalt-tungsten mixture as a source of the metal in the deposit, greater than about 1.4 mol/l of an amidosulfonic acid or a salt thereof, ammonium ions, formic acid or a salt thereof as a source of carbon in the deposit, and water.
Dependencies are inferred from the claim text.