C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
148/63
C23C 8/58 (2006.01) C23C 8/50 (2006.01) C23C 8/52 (2006.01)
Patent
CA 1049908
ABSTRACT OF THE DISCLOSURE: The invention relates to a method of maintaining at very low values the proportions of cyanides in molten-salt baths in which the main active principle is the cyanate anion CNO-, the method comprising the steps of conjointly providing in the salt bath sulphur in an amount between 0.001 and 0.1% of the weight of said bath, introducing periodically or conti- nuously into the bath at least one substrate comprising at least one carbonyl group =C =O in a quantity such that it corresponds to a weight of between 1 and 25 grams of CO per kg. of bath and per 24 hours maintenance at the bath working temperature of between 480° and 650°C. The substrate introducing the carbonyl group may also constitute a regenerating agent for the cyanate anion and can advantageously be obtained by baking carbamide for 3 to 10 hours at a temperature of between 150 and 450°C. The bath may be homogenized by agitation means including insufflation of air. The invention is especially applicable to the nitridation of mechanical parts in heat-treatment salt baths.
226907
Gaucher Antoine
Guilhot Gerard
Centre Stephanois de Recherches Mecaniques Hydromecanique Et Fro
Na
LandOfFree
Method of maintaining low values of cyanide in cyanate salt... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of maintaining low values of cyanide in cyanate salt..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of maintaining low values of cyanide in cyanate salt... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-245749