利刚原子力显微镜(AFM)对钢筋在模拟混凝土孔溶液中形成的钝化膜开展研究。结果表明,AFM是研究钝化膜微观结构和表面形貌的有力工具;钢筋钝化胶是有缺陷的;复合缓蚀剂可以改善钢筋钝化膜的微观结构和表面形貌从而提高抗点蚀的能。
Atomic force microscope(AFM) was used to study passive film on the rebar surface in a simulated concrete pore solution. AFM is a powerful tool for studying the microstructure and surface topography of passive film. The results revealed that no matter whether Cl- was present or not, there was always defects in the passive film on rebar. They might lie at the dislocations and dissoluble impurites.The maximum size of the defects was up to 10μm. The results also showed that these defects could be improved or even eliminated by adding composite inhibitors so that the resistance of pitting corrosion would be enhanced.
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