Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1990-08-07
1992-03-31
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
4273839, 427310, 148273, 148271, 148281, C23C 2002
Patent
active
051004860
ABSTRACT:
A process is disclosed for forming a protective metal coating on a metal surface using a flux consisting of an alkali metal fluoride, an alkaline earth metal fluoride, an alkali metal fluoaluminate, an alkali metal fluosilicate, and mixtures thereof. The flux, in particulate form, is mixed with particles of a metal coating material which may comprise aluminum, chromium, mixtures thereof, and alloys containing at least 50 wt. % aluminum and the particulate mixture is applied to the metal surface in a single step, followed by heating the coated metal surface to a temperature sufficient to cause the metal coating material to react with the metal surface to form a protective reaction product in the form of a metal coating bonded to the metal surface. The metal surface which reacts with the metal coating material to form the protective coating may comprise Fe, Co, Ni, Ti, V, Cr, Mn, Zr, Nb, Mo, Tc, Hf, Ta, W, Re and alloys thereof.
REFERENCES:
patent: 2889238 (1959-06-01), Lang
patent: 3723160 (1973-03-01), Tanaka
patent: 3748170 (1973-07-01), Michsel
patent: 3765953 (1973-10-01), Chevillon
patent: 4181757 (1980-01-01), Youdelis
Curtis Paul G.
Krikorian Oscar H.
Carnahan L. E.
Moser William R.
Sartorio Henry P.
Silverberg Sam
The United States of America as represented by the United States
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