通过动电位极化曲线、电化学阻抗谱以及Mott－Schottky曲线的测试，研究了预钝化电位对模拟混凝土孔溶液中钢筋的钝化作用及氯离子对钢筋钝性的影响。结果表明，在室温下相对于饱和甘汞电极电位为-0.200－0.200V范围于不同电位下分别预钝化4800s后，钢筋表面均处于钝态；钝化膜内浅层施主浓度随预钝化电位的升高而减少，深层施主浓度则增加；预钝化电位为0.200V时，钢筋钝化膜的电荷转移电阻最大；预钝化后的钢筋在含氯离子0.01－0.08mol/L、pH值为12.50的模拟混凝土孔溶液中浸泡24h后，其表面钝化膜表现为高掺杂的n型半导体，在0.15－0.47V电位区间内表现为一种类型的施主浓度，施主浓度随氯离子浓度的升高而减小。
Potentiodynamic anodic polarization, electrochemical impendence spectroscopy and Mott－Schottky plot were used to study the effect of passive potentials and chloride ion concentrations on the corrosion behavior of reinforcing steel in simulated concrete pore solutions. The results indicated that the compact passive films were formed on the reinforcing steel surface at different passive potentias from -0.200V to 0.200V vs SCE for 4800s, the superficial donor densities decreased with the potential while the deep donor densities increased with the potential, and the charge transfer resistance of the film reached the highest value at the passive potential 0.200V. Immersed in simulated concrete pore solutions with chloride ion concentration 0.01～0.08mol/L and pH12.50 for 24h, the passive film still behaved as n-type semiconductor, only one type of donor appeared from the Mott－Schottky plot, and the deep donor densities decreased with chloride ion concentrations.
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