Process and bath for electroplating nickel-chromium alloys
AssigneeThe United States of America as represented by the Secretary of Commerce
InventorDavid S. Lashmore
Life of this patent
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Abstract
A process for the electrodeposition of a nickel chromium alloy on a catho substrate comprises: contacting the substrate with an aqueous electrolyte containing: about 50-125 g/l of CrCl.sub.3.6H.sub.2 O; about 10-125 g/l of NiCl.sub.2.6H.sub.2 O; about 10-115 g/l of formic acid; about 25-50 g/l of boric acid; and about 50-100 g/l of sodium citrate dihydrate; adjusting the pH of the bath to about 1-5 and the temperature to about 20.degree.-60.degree. C.; and passing a sufficient current through the solution and to the substrate to effect deposition thereon of a nickel-chromium alloy.
Claims16
A process for the electrodeposition of a nickel-chromium alloy on a cathodic substrate, comprising:
- contacting the substrate with an aqueous electrolyte containing:
- about 50-125 g/l of CrCl.sub.3.6H.sub.2 O;
- about 10-125 g/l of NiCl.sub.2.6H.sub.2 O;
- about 10-115 g/l of formic acid;
- about 25-50 g/l of boric acid;
- and about 50-100 g/l of sodium citrate dihydrate;
- adjusting the pH of the bath to about 1-5 and the temperature to about 20.degree.-60.degree. C.;
- and
- passing a sufficient current through the solution and to the substrate to effect deposition thereon of a nickel-chromium alloy.
An aqueous electrolyte for electroplating nickel-chromium alloys by electrodeposition, consisting essentially of an aqueous solution containing:
- about 50-125 g/l of CrCl.sub.3.6H.sub.2 O ;
- about 10-125 g/l of NiCl.sub.2.6H.sub.2 O;
- about 10-115 g/l of formic acid;
- about 25-50 g/l of boric acid;
- and about 50-100 g/l of sodium citrate;
- said solution having a pH of 1-5.
Dependencies are inferred from the claim text.