Patent ID: 8551316

Claim:
A method for producing a metallic coating layer comprising nickel and molybdenum on an electrically conductive substrate by electrodeposition from an aqueous solution comprising nickel salts, gluconate anions and citrate anions wherein the substrate acts as the cathode and wherein molybdate is added and wherein the pH of the aqueous solution is adjusted between 5.0 and 8.5; wherein the aqueous solution comprises 0.53 to 1.06 mol/l NiSO 4 .6H 2 O 0.028 to 0.68 mol/l NiCl 2 .6H 2 O 0.008 to 0.10 mol/l ammonium molybdate or an alkali metal molybdate 0.45 to 0.54 mol/l sodium citrate 0.023 to 0.207 mol/l sodium gluconate 0.055 to 1.33 mol/l ammonium from an ammonium salt; wherein bath temperature is 30-80° C.; and wherein current density is 12.5 A/dm 2 -60 A/dm 2 .