C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 18/16 (2006.01) C23C 8/42 (2006.01) C23C 18/54 (2006.01)
Patent
CA 2540625
The invention relates to a method for treating ferrous alloy pieces by sulphidisation. According to said method, the pieces are immersed in a bath of aqueous solution with concentrations of soda, sodium thiosulphate, and sodium sulphide, without passing an electrical current through said bath, and the solution is brought to a temperature of between approximately 100 ·C and 140 ·C over a period of between approximately 5 and 30 minutes.
Selon ce procédé, on immerge les pièces dans un bain d~une solution aqueuse, sans passage d~un courant électrique, avec des concentrations de soude, de thiosulfate de sodium et de sulfure de sodium, ladite solution étant portée à une température comprise entre environ 100~C et 140~C et pendant une durée comprise entre 5 et 30 minutes environ.
Heau Christophe
Maurin-Perrier Philippe
H.e.f.
Marks & Clerk
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