Abstract
The promoting reaction of BaCO3 can be observed even when BaCO3 and iron piece to be cementated by CO gas, are placed separately in a cementating chamber. This fact is explained as follows: CO gas formed in the system will be at first adsorped on surfaces of BaCO3 crystals and then decomposed as 4CO=C3O2+CO2 C3O2 thus formed will be desorped into a gaseous phase and perhaps partially polymerised and decomposed by the reaction C3O2=C2+CO2 where C2 will be in gaseous state, as A. Klemenc (4) observed. By the diffusion and dissolution of this C2 gas into the iron piece, a solid solution is formed.
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