Effect of the O2 in the high temperature corrosion ofmetallic materials in waste incineration atmosphere

摘要

The high temperature corrosion behaviour of metallic materials was investigated in arnsimulated waste incineration environments N2-8%O2-0.2%HCl-15%H2O-0.02%SO2rnand with the omission of oxygen to see its effect at 400°C using discontinuousrnexposures and thermogravimetric experiments. The samples were covered withrnPbCl2-KCl-ZnCl2 in some experiments and in others without. The products of the highrntemperature corrosion were analyzed by X-ray diffraction and scanning electronrnmicroscopy with EDX-analysis. The behaviour with the complete atmosphere andrnwith salts showed a subparabolic effect. The presence of O2 produce oxidation withrnthe generation of stable oxides. The omission of oxygen decrease the mass gainrnbecause the omission of the direct oxidation.