利用交流阻抗技术(EIS)研究了N80油套管钢在0.5 mol/L NaHCO3溶液中所成转化膜的电化学性能,用莫特-肖特基曲线分析了成膜电位、测试频率及Cl-浓度对转化膜半导体性能的影响.结果表明:转化膜呈n型半导体特征;随成膜电位增加,膜的容抗和施主密度减小;随Cl-浓度增加,膜的容抗和施主密度增加,膜的点蚀加剧.
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