Cyaniding steels with the use of triethanolamine

Cyaniding is widely used in basic engineering for surface strengthening of parts. Triethanolamine is often used as the liquid matter in the process. However, cyaniding is often conducted by adding ammonia into the liquid matter, which creates problems with the utilization of the remaineder of the gas. The addition of other gases (nitrogen, argon, etc.) into ammonia is not appropriate because the latter does not decompose completely. The present paper is devoted to the results of industrial tests of a cyaniding technology at 800°C with the use of triethanolamine without ammonia or any other gas or substance. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 8–11, February, 1998.