|
|
| ¡¡ Influence of Cl- on Semiconductive Properties
of Passive Film Formed on N80 Oil Tube Steel Abstract£ºElectrochemical impedance spectroscopy £¨EIS£© technology was used to
explore the semiconductive behaviors of passive film formed on N80 oil tube steel in
0.5mol/L NaHCO3 solution£® On the basis of Mottª²Schottky analysis£¬the
effects of measured frequency£¬film formation potentials and Cl- concentration
on the semiconductive properties of passive film were discussed£® The results show that
with increasing film formation potentials£¬ the capacitance and donor density of the
passive film decrease£® The increased Cl- content increases the capacitance
and donor density of the passive film£®The addition of Cl- reduces the donor
density and enhances the occurrence of pitting corrosion in the passive film£® The X-ray
photoelectron spectroscopy £¨XPS£© analysis indicates that the passive film consists
primarily of Fe2Oe3 and FeO£® |
|
