Method of boronizing transition metal surfaces

Patent · Sat Jan 01 04:00:00 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
• 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

/148/427/
24
700
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crb
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salt
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useful