Method of boronizing transition metal surfaces

Details Method of boronizing transition metal surfaces Method of boronizing transition metal surfaces

1981-08-28

1983-08-16

Lusignan, Michael R.

Metal treatment

Compositions

Heat treating

427431, 427432, 427435, 204 39, B05D 512

Patent

active

043989683

ABSTRACT:
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.

REFERENCES:
patent: 2572249 (1951-10-01), Cooper
patent: 3024176 (1962-03-01), Cook
patent: 3634145 (1972-01-01), Homan
patent: 3770512 (1973-11-01), Bopp
patent: 3880729 (1975-04-01), Kellner

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