Method of coating metal surfaces to form protective metal coating thereon

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868215

Krikorian, Oscar H ^[1]; Curtis, Paul G ^[2]

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1. Danville, CA
2. Tracy, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5100486
• OSTI ID: 868215
• Country of Publication: United States
• Language: English

Related Subjects

method
coating
metal
surfaces
form
protective
thereon
process
disclosed
forming
surface
flux
consisting
alkali
fluoride
alkaline
earth
fluoaluminate
fluosilicate
mixtures
particulate
mixed
particles
material
comprise
aluminum
chromium
alloys
containing
50
wt
mixture
applied
single
step
followed
heating
coated
temperature
sufficient
react
reaction
product
bonded
reacts
mn
zr
nb
tc
hf
coating thereon
coating metal
alloys containing
single step
protective coating
coating material
metal surface
metal surfaces
alkali metal
alkaline earth
earth metal
temperature sufficient
reaction product
metal coating
particulate form
metal fluoride
particulate mixture
alloys contain
coating bonded
protective metal
coated metal
/148/427/