摘要
综述了混凝土环境中钢筋钝化特征的常见表征方法,着重介绍了开路电位(OCP)、循环极化、交流阻抗(EIS)、MottSchottky曲线、光电子能谱(XPS)、微区拉曼光谱(μ-Raman)等技术在分析钢筋钝化性能方面的用途。总结了混凝土环境中Cl-浓度、pH值、应力作用等因素对钢筋钝化性能的影响,随着Cl-浓度的增加、pH值的降低、应力作用的增大,钢筋的钝化性能降低,其腐蚀倾向明显增加。最后对后续的钢筋钝化性能研究做了展望。
This paper reviews the main characterization methods for studying passive behavior of rebar, introducing the application of open circuit potential （OCP）, cyclic polarization, electrochemical impedance spectroscopy （EIS）, Mott-Schottky plots, X-ray photoelectron spectroscopy （XPS）, andmicro-Raman spectroscopy （μ-Raman） in passive behavior of rebar in concrete environments. In addition, the influence of Cl^- ions, pH of solution, and stress on the passive behavior of rebar in concrete environments is discussed.With the increase of Cl^- concentration and stress, or decrease of solution pH, the passivity of rebar degraded and the rebar was more susceptive to corrosion. Finally, further research prospect is presented.
出处
《科技导报》
CAS
CSCD
北大核心
2014年第25期81-84,共4页
Science & Technology Review
基金
国家自然科学基金青年科学基金项目(51301060)
中央高校基本科研业务费专项(2013B03514)
关键词
混凝土
钢筋
钝化膜
表征方法
concrete
rebar
passive film
characterization method
