Electrodeposition of amorphous ternary nickel-chromium-phosphorus alloy
First Claim
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1. A method of forming amorphous ternary nickel-phosphorus-chromium alloy deposits by electrodeposition on an electrically conductive substrate, comprising subjecting said substrate to an applied current density between about 20 and 40 A/dm2 at a temperature from the range of about 20 °
- to 30°
C. in a bath comprising;
a chromium salt and a nickel salt in a weight ratio of about 3;
1, a phosphorus source at about 0.3M P concentration;
about 0.3M of a complexing agent;
about 0.1M of a supporting salt; and
about 1.0M of buffer.
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Abstract
Amorphous ternary nickel-chromium-phosphorus alloys are electrodeposited from a bath comprising a nickel salt, a chromium salt, a phosphorus source such as sodium hypophosphite, a complexing agent for the nickel ions, supporting salts to increase conductivity, and a buffering agent. The process is carried out at about room temperature and requires a current density between about 20 to 40 A/dm2.
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Citations
10 Claims
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1. A method of forming amorphous ternary nickel-phosphorus-chromium alloy deposits by electrodeposition on an electrically conductive substrate, comprising subjecting said substrate to an applied current density between about 20 and 40 A/dm2 at a temperature from the range of about 20 °
- to 30°
C. in a bath comprising;
a chromium salt and a nickel salt in a weight ratio of about 3;
1, a phosphorus source at about 0.3M P concentration;
about 0.3M of a complexing agent;
about 0.1M of a supporting salt; and
about 1.0M of buffer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- to 30°
- 9. A method for electrodepositing amorphous nickel-chromium-phosphorus alloys on an electroconductive substrate, comprising subjecting the substrate to an applied current density between about 200 to about 300 mA/cm2, at room temperature, in a bath at about pH 3.0, comprising
- space="preserve" listing-type="tabular">______________________________________ NiCl.sub.2.6H.sub.2 O 30 g/l CrCl.sub.3.6H.sub.2 O 100 g/l HCOOH 35 ml/l KBr 17.3 g/l NH.sub.4 Cl 50 g/l Na.sub.3 (citr.).2H.sub.2 O 80 g/l H.sub.3 BO.sub.3 35 g/l NaH.sub.2 PO.sub.2.H.sub.2 O 30 g/l ______________________________________
- View Dependent Claims (10)
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Current AssigneeSandia Corporation (Martin Marietta Corporation)
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Original AssigneeUnited States Department of Energy (Government of the United States of America)
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InventorsGuilinger, Terry R.
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Primary Examiner(s)Kaplan, G. L.
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Application NumberUS07/338,013Time in Patent Office270 DaysField of Search204/43.1, 204/44.7US Class Current205/243CPC Class CodesC25D 3/56 of alloysC25D 3/562 containing more than 50% by...
