Methods for forming an electrolytic deposit containing molybdenu

Details Methods for forming an electrolytic deposit containing molybdenu Methods for forming an electrolytic deposit containing molybdenu

1973-06-18

1976-03-30

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 38B, 204 43T, 204 40, 204 43R, C25D 550, C25D 356, C25D 510

Patent

active

039473317

ABSTRACT:
The molybdenum is deposited with at least one transition metal. The support is placed at the cathode and the bath in which this cathode is immersed contains at least one compound of molybdenum and at least one compound of the transition metal. The bath contains a mixture of an alkaline molybdate of a transition metal salt and of an alkaline salt of an organic acid with a mixed acid-alcohol function, this salt being able to give complexes with the molybdenum and transition metal ions of the other constituents. The pH and the temperature of the bath are kept compatible with the stability of these complexes. A cathodic current density greater than a "fissuration threshold" is used and the electro-deposition treatment is carried out for a duration which must be less than a "scaling duration". Each layer of alloy deposited electrolytically on the sub-adjacent support is subjected to heat treatment in a non oxidizing medium at a temperature between 700.degree.C and 1200.degree.C and compatible with the preservation of the properties of the support, this heat treatment being effected for between 2 and 24 hours.

REFERENCES:
patent: 734522 (1903-07-01), Edison
patent: 2156262 (1939-05-01), Fink et al.
patent: 2599178 (1952-06-01), Holt et al.
patent: 2653128 (1953-09-01), Brenner et al.
"Electrodeposition of Alloys" by Abner Brenner, Vol. 1, 1963, p. 122.
"Modern Electroplating" by Lowenheim, 2nd Ed., 1963, pp. 288-289.
"Electrodeposition of Mo Alloys From Aqueous Solutions" by D. W. Ernst et al., J. Electro Chem. Soc., Aug. 1955, pp. 461-469.
Principles of Electroplating and Electroforming by Blum et al., 3rd Ed. 1949, pp. 67, 129.
Modern Electroplating by Lowenheim, 2nd Ed., 1963, p. 41.

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