Method for surface treatment and treating material therefor

Details Method for surface treatment and treating material therefor Method for surface treatment and treating material therefor

C - Chemistry, Metallurgy

23

C

148/15

C23C 8/46 (2006.01) C23C 8/44 (2006.01)

Patent

CA 1305022

ABSTRACT OF THE DISCLOSURE A method and a bath agent for forming a carbide or diffusion layer on the surface of an article to be treated by immersing the article in a molten salt bath. The salt bath comprises borax, at least one oxide of a surface layer forming element (SFE) selected from the group consisting of an oxide of a Va-Group element of the Periodic Table and an oxide of chromium, and aluminum, The amounts of the SFE-oxide and of aluminum to the whole amount of the bath are 9.5 to 21.5 wt% and 4 to 7.5 wt%, respectively. The treating method provides the extended life of the bath, the facilitation of washing of the bath agent adhered to the treated article, etc.

541187

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