Carbon deposition cementite formation

The understanding of the MD of selected pme metals and alloys has been summarized in recent reviews such as that presented by Ramanarayanan and Chun [30]. The formation of a surface layer of cementite that is further destabilized by carbon deposition is the main mechanism for the corrosion of iron. On decomposition Fe nanoparticles are formed that catalyze... 

When heated in a continuous current of carbon monoxide at 650° C., a considerable quantity of carbon is deposited. If, however, the carbon monoxide is admitted to a closed vessel containing the heated metal, absorption of the gas takes place, possibly with the formation of cementite—that is, iron carbide, Fe3C. 

---