Method of boronizing transition metal surfaces
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 C and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface. 4 figs.
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- PTO; EDB-94-124272
- Patent Number(s):
- A; US 4398968
- Application Number:
- PPN: US 6-297310
- OSTI ID:
- 7149761
- Country of Publication:
- United States
- Language:
- English
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Method of boronizing transition metal surfaces
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Related Subjects
360105 -- Metals & Alloys-- Corrosion & Erosion
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALI METAL COMPOUNDS
BORIDES
BORON COMPOUNDS
CHROMIUM BORIDES
CHROMIUM COMPOUNDS
COATINGS
CORROSION PROTECTION
DEPOSITION
DIP COATING
ELECTROCHEMICAL CELLS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MANGANESE BORIDES
MANGANESE COMPOUNDS
METALS
NICKEL BORIDES
NICKEL COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM FLUORIDES
PROTECTIVE COATINGS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS