Regenerants for carburizing salt baths and a process for the...

Details Regenerants for carburizing salt baths and a process for the... Regenerants for carburizing salt baths and a process for the...

C - Chemistry, Metallurgy

23

C

148/41, 148/66

C23C 8/56 (2006.01) C23C 8/40 (2006.01)

Patent

CA 1200472

ABSTRACT Regenerants for carburizing salt baths and a process for the production thereof Polymeric organic substances are known for the regeneration of salt baths for nitrating parts consisting of iron and steel, but these substances cannot be used in carburizing salt baths since they produce only small quantities of cyanide which is active in the carburization process, they cause the baths to foam and carbon residues are formed. An excellent regenerant for carburizing salt baths may be obtained if polymeric organic compounds, having a total composition of [C6HxNy]z,are used, in which x represents from 3 to 5, y represents from 5 to 8, and z represent from 10 to 10,000. These compounds are obtained by reacting formaldehyde with cyanamide and/or dicyandiamide and/or melamine and by pyrolytically decomposing the reaction product at a temperature ranging from 300 to 600°C.

444877

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