最近,日本研究了一种无毒液体渗碳法,代替原来的氰化法。使用的盐浴是由碱金属或碱土金属的卤化物、氢氧化物、碳酸盐、硼酸盐和磷酸盐等混合使用。同时在盐浴中装一根导管,向盐浴中通入天然气或丙烷气,做为碳的补给源。这种方法的特点是:可用原氰化法时的装置;无毒,无有害气体产生, Recently, Japan studied a non-toxic liquid carburizing method, instead of the original cyanidation method. The salt bath used is a mixture of alkali metal or alkaline earth metal halides, hydroxides, carbonates, borates and phosphates. At the same time in the salt bath with a catheter, the salt bath into the natural gas or propane gas, as a carbon source. This method is characterized by: available when the original cyanidation of the device; non-toxic, no harmful gases,