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通过开路电位、电化学阻抗、Mott-Schottk等电化学方法研究了不同形变量的不锈钢在模拟混凝土孔隙液中的钝化性能。结果表明,随着形变量的增加,不锈钢的开路电位和阻抗值都逐渐降低,其钝化膜中氧空位浓度明显升高。随着形变量的增加,不锈钢的钝化性能有所降低。不同形变量的不锈钢的钝化性能之间的差异不会随着其在孔隙液中浸泡时间的延长而减小。
The passivation properties of stainless steel with different deformations in simulated concrete pore fluid were investigated by open circuit potential, electrochemical impedance and Mott-Schottk electrochemical methods. The results show that with the increase of deformation, the open circuit potential and the resistance value of stainless steel decrease gradually, and the oxygen vacancy concentration in the passivation film increases obviously. As the amount of deformation increases, the passivation properties of stainless steel decrease. The difference between the passivation properties of stainless steels with different deformations does not decrease as the soaking time in the pore fluid increases.