Chemistry: electrical and wave energy – Processes and products
Patent
1984-12-18
1985-12-24
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
C25D 344
Patent
active
045604460
ABSTRACT:
Transition metals of the groups IVB, VB and VIB or alloys thereof with Al are electrodeposited in a system of an electrolyte based on an aromatic hydrocarbon. The electrolyte is originally prepared by dissolving 0.02 to 0.2 moles of an inexpensive high oxidation state transition metal halide and 0.2 to 0.5 moles AlBr.sub.3 in 1.00 mole of the aromatic hydrocarbon. Additions of transition metal powders or Mg or Al particles lead to the pre-reduction of the high oxidation state transition metal ions to lower oxidation states. Alkali metal or Mg halides may be used to establish favorable bath conditions. The electrolysis is carried out with dissolvable metal anodes, to maintain the bath composition. The plating current density, bath composition and method of preparation are chosen to obtain the desired composition of the coatings.
REFERENCES:
patent: 2170375 (1939-08-01), Mathers
patent: 3775260 (1973-11-01), Capuano
patent: 3997410 (1976-12-01), Gileadi
patent: 4003804 (1977-01-01), Wong
patent: 4381976 (1983-05-01), Armand
"Electrodeposition of Metals from Organic Solutions" Jnl. of Electrochemical Socy., Jan. 1957, pp. 21-29.
Nguyen Thinh
Vance Christopher J.
Wiaux Jean-Pol
Collins Arthur S.
Eltech Systems Corporation
Freer John J.
Tufariello T. M.
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