Electrodeposition of nickel

Claim 1

A METHOD OF ELECTRODEPOSITING NICKEL ON A METALLIC SURFACE IN THE FORM OF A DEPOSIT WHICH IS BRIGHT AS TAKEN FROM THE PLATING SOLUTION WITHOUT FUTHER TREATMENT, AND WHICH DEPOSIT IS DUCTILE AND SMOOTHER THAN SAID METALLIC SURFACE WHEN TH ROOT MEAN SQUARE AVERAGE DEVIATION OF THE IRREGULARITIES IN THE SURFACE THEREOF FROM THE AVERAGE SURFACE PLANE IS ABOUT 10 TO 15 MICROINCHES, AND THE THICKNESS OF THE DEPOSIT IS ABOUT 0.001" WHICH METHOD COMPRISES ELECTROYLYZING AN AQUEOUS, ACID SOLUTION OF A NICKEL ELECTROLYTE OF THE CLASS CONSISTING OF NICKEL SULFATE, NICKEL CHOL RIDE, AND MIXTURES OF NICKEL SULFATE WITH NICKEL CHLORIDE, SAID SOLUTION ALSO CONTAINING COOPERATING ADDITION AGENTS CAPABLE OF IMPARTING BRIGHTNESS AND SMOOTHING POWER AS AFORESAID, ONE OF SAID ADDITION AGENT BEING A PYRIDINIUM CARBOXYLATE COMPOUND SELECTED FROM THE CLASS CONSISTING OF 1-(CARBOXYMETHYL) PYRIDINIUM CHLORIDE, 1-(CARBOXYMETHYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYAMYL) PYRIDINIUM, 1-(1''CARBOXYPROPYL) PYRIDINIMUM BROMIDE, 1-(1''-CARBOXY - 1'' - PHENYIMETHYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYETHYL) PRYIDINIUM CHLORIDE, 1-(1''CARBOXYVINYL) PYRIDINIUM BROMIDE, 1-(2''-CARBOXYETHYL PYRIDINIUM CHLORIDE, 1-(2''-CARBOXYPROPYL) PYRIDINIUM CHLORIDE, 1-(1''-CARBOXYISOBUTYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYBUTYL) PYRIDINIUM BROMIDE, AND 1-3''-CARBOXYPROPYL) PYRIDINIUM BROMIDE, AND THE SECOND OF SAID ADDITION AGENTS BEING AN AROMATIC SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA ARSOR2R, WHERE AR IS SELECTED FROM THE CLASS CONSISTING OF BENZENE AND NAPHTHALENE RADICALS AND R IS SELECTED FROM THE CLASS CONSISTING OF OH, NH2, NHSO2PH, NHSO2 ALKYL WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 12 CARBON ATOMS, AND CHLORO AND BROMO SUBSTITUTION PRODUCTS OF SAID COMPOUNDS AND THE NICKEL, IRON, COBALT, SODIUM AND POTASSIUM SALTS OF THE FOREGOING.

Claim 2

A METHOD OF ELECTRODEPOSITING NICKEL ON A METALLIC SURFACE IN THE FORM OF A DEPOSIT WHICH IS BRIGHT AS TAKEN FROM THE PLATING SOLUTION WITHOUT FUTHER TREATMENT, AND WHICH DEPOSIT IS DUCTILE AND SMOOTHER THAN SAID METALLIC SURFACE WHEN TH ROOT MEAN SQUARE AVERAGE DEVIATION OF THE IRREGULARITIES IN THE SURFACE THEREOF FROM THE AVERAGE SURFACE PLANE IS ABOUT 10 TO 15 MICROINCHES, AND THE THICKNESS OF THE DEPOSIT IS ABOUT 0.001" WHICH METHOD COMPRISES ELECTROYLYZING AN AQUEOUS, ACID SOLUTION OF A NICKEL ELECTROLYTE OF THE CLASS CONSISTING OF NICKEL SULFATE, NICKEL CHOL RIDE, AND MIXTURES OF NICKEL SULFATE WITH NICKEL CHLORIDE, SAID SOLUTION ALSO CONTAINING COOPERATING ADDITION AGENTS CAPABLE OF IMPARTING BRIGHTNESS AND SMOOTHING POWER AS AFORESAID, ONE OF SAID ADDITION AGENT BEING A PYRIDINIUM CARBOXYLATE COMPOUND SELECTED FROM THE CLASS CONSISTING OF 1-(CARBOXYMETHYL) PYRIDINIUM CHLORIDE, 1-(CARBOXYMETHYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYAMYL) PYRIDINIUM, 1-(1''CARBOXYPROPYL) PYRIDINIMUM BROMIDE, 1-(1''-CARBOXY - 1'' - PHENYIMETHYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYETHYL) PRYIDINIUM CHLORIDE, 1-(1''CARBOXYVINYL) PYRIDINIUM BROMIDE, 1-(2''-CARBOXYETHYL PYRIDINIUM CHLORIDE, 1-(2''-CARBOXYPROPYL) PYRIDINIUM CHLORIDE, 1-(1''-CARBOXYISOBUTYL) PYRIDINIUM BROMIDE, 1-(1''-CARBOXYBUTYL) PYRIDINIUM BROMIDE, AND 1-3''-CARBOXYPROPYL) PYRIDINIUM BROMIDE, AND THE SECOND OF SAID ADDITION AGENTS BEING AN AROMATIC SULFUR COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA ARSOR2R, WHERE AR IS SELECTED FROM THE CLASS CONSISTING OF BENZENE AND NAPHTHALENE RADICALS AND R IS SELECTED FROM THE CLASS CONSISTING OF OH, NH2, NHSO2PH, NHSO2 ALKYL WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 12 CARBON ATOMS, AND CHLORO AND BROMO SUBSTITUTION PRODUCTS OF SAID COMPOUNDS AND THE NICKEL, IRON, COBALT, SODIUM AND POTASSIUM SALTS OF THE FOREGOING.