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Electrodeposition of Cobalt-Phosphorous Alloys

IP.com Disclosure Number: IPCOM000097005D
Original Publication Date: 1962-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Koretzky, H: AUTHOR

Abstract

In the electrodeposition of alloys of cobalt and phosphorous from an ammoniacal bath, the resulting deposited magnetic coating has a coercive force between 500 - 750 oersteds.

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Electrodeposition of Cobalt-Phosphorous Alloys

In the electrodeposition of alloys of cobalt and phosphorous from an ammoniacal bath, the resulting deposited magnetic coating has a coercive force between 500 - 750 oersteds.

The bath operates at a current density of 60 amps per sq. ft. and consists essentially of the following constituents within the ranges indicated: Preferred Optimum

Cobaltous Chloride 20-30 g/1 20 g/1

(CoCl(2) * 6H(2)O)

Ammonium Chloride 20-200 g/1 50 g/1

Sodium Tartrate 30-200 g/1 80 g/1

(NaKC(4)H(4)O(6))

Sodium Hypophosphite 50-100 g/1 60 g/1

(NaH(2)PO(2) * H(2)O)

pH 7.0-9.0 7.5

Temperature 50 - 80 degrees C 60 degrees C

The cobalt-phosphorous film is electrodeposited onto a brass substrate, which, during the plating, is agitated at about 300 rpm for a period of 10 minutes to give a deposit of about 0.1 to 0.5 mils thickness.

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