| Cl-对N80油套管钢钝化膜半导体性能的影响 |
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| 引用本文： | 李金波,郑茂盛. Cl-对N80油套管钢钝化膜半导体性能的影响[J]. 西安交通大学学报, 2006, 40(11): 1325-1328 |
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| 作者姓名： | 李金波 郑茂盛 |
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| 作者单位： | 西安交通大学金属材料强度国家重点实验室,710049,西安 |
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| 摘 要： | 利用电化学阻抗谱技术研究了N80油套管钢在0．05mol／L NaHCO3溶液中所成钝化膜的电化学性能，借助于莫特-肖特基曲线分析了成膜电位、测试频率以及Cl^-浓度对钝化膜半导体性能的影响．结果表明：钝化膜呈n型半导体特征；随着成膜电位的增加，膜的容抗和施主密度减小；随着Cl^-浓度的增加，膜的容抗和施主密度增加，膜的点蚀现象加剧．X射线光电子光谱（XPS）分析结果表明，钝化膜主要由Fe的氧化物Fe2O3和FeO组成．
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| 关 键 词： | 钝化膜 电化学阻抗谱 莫特-肖特基分析 油套管钢 |
| 文章编号： | 0253-987X（2006）11-1325-04 |
| 收稿时间： | 2006-03-23 |
| 修稿时间： | 2006-03-23 |
Influence of Cl- on Semiconductive Properties of Passive Film Formed on N80 Oil Tube Steel |
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| Li Jinbo,Zheng Maosheng. Influence of Cl- on Semiconductive Properties of Passive Film Formed on N80 Oil Tube Steel[J]. Journal of Xi'an Jiaotong University, 2006, 40(11): 1325-1328 |
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| Authors: | Li Jinbo Zheng Maosheng |
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| Abstract: | Electrochemical impedance spectroscopy(EIS) technology was used to explore the semiconductive behaviors of passive film formed on N80 oil tube steel in 0.5mol/L NaHCO_3 solution.On the basis of Mott-Schottky 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 Fe_2O_3 and FeO. |
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| Keywords: | passive film electrochemical impedance spectroscopy Mott-Schottky analysis oil tube steel |
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