C - Chemistry – Metallurgy – 23 – C
Patent
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
Arai Tohru
Oikawa Hatsuhiko
Kabushiki Kaisha Toyota Chuo Kenkyusho
Smart & Biggar
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