Method of boronizing transition metal surfaces

Patent · Sat Jan 01 00:00:00 EST 1983

OSTI ID:864665

Koyama, Koichiro ^[1]; Shimotake, Hiroshi ^[2]

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1. Hyogo, JP
2. Hinsdale, IL

A method is presented for preparing a boride layer on a transition metal substrate for use in corrosive environments or as a harden surface in machine applications. This method is particularly useful in treating current collectors for use within a high temperature and corrosive electrochemical cell environment. A melt of a alkali metal boride tetrafluoride salt including such as KF to lower its melting point is prepared including a dissolved boron containing material, for instance NiB, MnB.sub.2, or CrB.sub.2. A transition metal to be coated is immersed in the melt at a temperature of no more than 700.degree. C. and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Koyama, Koichiro (Hyogo, JP);Shimotake, Hiroshi (Hinsdale, IL)
• Patent Number(s): US 4398968
• OSTI ID: 864665
• Country of Publication: United States
• Language: English

Related Subjects

method
boronizing
transition
metal
surfaces
preparing
boride
layer
substrate
corrosive
environments
harden
surface
machine
applications
particularly
useful
treating
current
collectors
temperature
electrochemical
cell
environment
melt
alkali
tetrafluoride
salt
including
kf
melting
prepared
dissolved
boron
containing
material
instance
nib
mnb
crb
coated
immersed
700
degree
formed
period
24
hours
salt including
corrosive environment
metal substrate
boron containing
metal surface
metal surfaces
current collector
alkali metal
electrochemical cell
particularly useful
transition metal
substrate surface
fluoride salt
current collectors
corrosive environments
containing material
cell environment
/148/427/