Process of electrodepositing a corrosion resistant nickel-chromium coating and products thereof

Claim 1

A COMPOSITE ELECTROPLATE ON A METAL SUSCEPTIBLE TO ATMOSPHERIC CORROSION WHICH COMPRISES A NICKEL PLATE WITH A CHROMOUM OVERPLATE, SAID NICKEL PLATE HAVING BEEN ELECTRODEPOSITED FROM AN ACIDIC NICKEL PLATING BATH CONTAINING DISSOLVED THEREIN AT LEAST ONE ORGANIC NICKEL BRIGHTER CAPABLE OF PRODUCING SEMI-BRIGHT TO FULLY BRIGHT NICKEL PLATE, AND HAVING DISPERSED IN SAID BATH IN A CONCENTRATION OF ABOUT 0.1 TO ABOUT 250 GRMS/LITER OF AT LEAST ONE TYPE OF BATH INSOLUBLE PARTICLES OF AVERAGE ULTIMATE PARTICLE SIZE LESS THAN ABOUT 5 MICRONS, AN ELECTRODEPOSITED CHROMIUM OVERLAY PLATE ON SAID NICKEL PLATE OF LESS THAN ABOUT 5 MICRONS THICKNESS, AND PARTICLES IN SAID NICKEL BATH BEING SELECTED FROM THE GROUP CONSISTING OF BORON AND SILICON, AND THE BORIDES OF CALCIUM, MAGNESIUM, TANTALUM, CHROMIUM, TITANIUM, ZIRCONIUM AND VANADIUM, THE CARBIDES OF CHROMIUM, VANADIUM, TUNGSTEN, AND ZIRCONIUM, THE NITRIDES OF SILICON, TITANIUM AND AIRCONIUM, THE SILICIDES OF TITANIUM, ZIRCONIUM, NICKEL, AND COBALT, THE PHOSPHIDES OF CHORMIUM, TUNGSTEN, MOLBYBENUM, MANGANSE, NICKEL, COBALT, IRON, TITANIUM, ZIRCONIUM AND VANADIUM, AND THE OXIDE OF STANNIC TIN.