Method for electrodeposition of nickel-chromium alloys and coating of uranium

Claim 2

A PROCESS FOR THE ELECTRODEPOSITION OF A NICKEL-CHROMIUM BINARY ALLOY ON A CATHODIC SUBSTRATE COMPRISING: IMMERSING THE SUBSTRATE IN AN AQUEOUS PLATING BATH CONSISTING ESSENTIALLY OF ABOUT 0.08 TO 0.19 DISODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID, ABOUT 0.5 TO 1.0 M CHRO MIUM POTASSIUM SULFATE, ABOUT 0.25 TO 0.5 M NICKEL SULFATE AND ABOUT 0.3 TO 0.5 M BORIC ACID; ADJUSTING THE PH OF THE SOLUTION TO ABOUT 1.5 TO 2.5 AND THE TEMPERATURE TO BETWEEN ABOUT 45* AND 55*C.; AND AGITATING THE SOLUTION WHILE PASSING A CURRENT OF FROM ABOUT 125 TO ABOUT 330 MA/CM2 THROUGH THE SOLUTION TO THE CATHODIC SUBSTRATE, THEREBY DEPOSITING A BINARY NICKELCHROMIUM ALLOY ON THE SUBSTRATE.

Claim 3

The process of claim 1 wherein the substrate is selected from the group consisting of nickel, brass and copper.

Claim 4

The process of claim 2 wherein the plating solution contains about 0.15 M disodium salt of ethylenediaminetetraacetic acid, about 0.76 M chromium potassium sulfate, about 0.40 M nickel sulfate, about 0.40 M boric acid, the temperature of the solution is 50*C., current density is about 230 mA/cm2 and the pH is about 1.5, whereby the nickel-chromium alloy is about 0.5 percent chromium.

Claim 5

The process of claim 3 wherein the pH is 2.4, whereby the nickel-chromium alloy is about 9.0 percent chromium.

Claim 6

The process of claim 3 wherein the current density is about 330 mA/cm2 and the pH is about 2.5, whereby the nickel-chromium alloy is about 56 percent chromium.

Claim 7

The process of claim 5 wherein the pH is about 2.1 and the concentration of the disodium salt of ethylenediaminetetraacetic is about 0.22 M, whereby the nickel-chromium alloy is about 88% chromium.

Claim 8

IN THE PROCESS FOR PROTECTING URANIUM METAL FROM CORROSION BY APPLYING A LAYER OF NICKEL TO THE OUTER SURFACE OF THE METAL, THE IMPROVEMENT COMPRISING IMMERSING THE NICKELPLATED URANIUM METAL IN AN AQUEOUS PLATING BATH CONSISTING ESSENTIALLY OF ABOUT 0.08 TO 0.19 M DISODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID, ABOUT 0.5 TO 1.0 M CHROMIUM POTASSIUM SULFATE, ABOUT 0.25 TO 0.5 M NICKEL SULFATE AND ABOUT 0.3 TO 0.5 M BORIC ACID; ADJUSTING THE PH OF THE SOLUTION TO ABOUT 1.5 TO 2.5 AND THE TEMPERATURE TO BETWEEN ABOUT 45* AND 55:C,; AND AGITATING THE SOLUTION WHILE PASSING A CURRENT OF FROM ABOUT 125 TO ABOUT 330 MA/CM2 THROOUGH THE PLATING SOLUTION TO THE NICKEL-PLATED URANIUM METAL, THEREBY DEPOSITING A LAYER OF BINARY NICKEL-CHROMIUM ALLOY ON THE NICKELPLATED URANIUM METAL.

Claim 9

IN THE PROCESS FOR PROTECTING URANIUM METAL FROM CORROSION BY APPLYING A LAYER OF NICKEL TO THE OUTER SURFACE OF THE METAL, THE IMPROVEMENT COMPRISING IMMERSING THE NICKELPLATED URANIUM METAL IN AN AQUEOUS PLATING BATH CONSISTING ESSENTIALLY OF ABOUT 0.08 TO 0.19 M DISODIUM SALT OF ETHYLENEDIAMINETETRAACETIC ACID, ABOUT 0.5 TO 1.0 M CHROMIUM POTASSIUM SULFATE, ABOUT 0.25 TO 0.5 M NICKEL SULFATE AND ABOUT 0.3 TO 0.5 M BORIC ACID; ADJUSTING THE PH OF THE SOLUTION TO ABOUT 1.5 TO 2.5 AND THE TEMPERATURE TO BETWEEN ABOUT 45* AND 55:C,; AND AGITATING THE SOLUTION WHILE PASSING A CURRENT OF FROM ABOUT 125 TO ABOUT 330 MA/CM2 THROOUGH THE PLATING SOLUTION TO THE NICKEL-PLATED URANIUM METAL, THEREBY DEPOSITING A LAYER OF BINARY NICKEL-CHROMIUM ALLOY ON THE NICKELPLATED URANIUM METAL.