摘要
兰州地区地下水对钢筋混凝土中钢筋有腐蚀性,为研究这种腐蚀作用的强弱以及腐蚀规律,采用电化学法,将钢筋混凝土试件浸泡在不同浓度硫酸盐和氯盐耦合溶液环境中,通过CS系列电化学工作站,测试钢筋混凝土的极化曲线和交流阻抗,分析不同盐环境中钢筋的自腐电位、电流密度和极化电阻等物理量的变化.实验结果表明,随着时间发展,钢筋的腐蚀速率是先增大后减小,再增大的循环过程;硫酸盐对钢筋的腐蚀有一定抑制作用,并且硫酸盐浓度越大这种抑制作用越明显.
The groundwater in Lanzhou area is corrosive to the reinforcing steel in reinforced concrete. In order to study the intensity of this kind of corrosion effect and the corrosion pattern, electrochemical meth- od was applied to soak the reinforced concrete specimen into the coupling solution of sulphate with chloride with various concentration. The polarization curves and AC impedance of the reinforced concrete were tested by employing CS series electrochemical workstation. The variation of the physical quantities such as self-corrosion potential, current density, and polarization resistance of the reinforcing steel in different salt environments was analyzed. The experimental result shows that with the propagation of time, the corrosion rate of the reinforcing steel will increase first, then decrease, and then increase again in a manner of circulation process. Sulfate will have certain inhibitory effect on the corrosion of the reinforcing steel, and the larger the sulfate concentration is, the more obvious of this inhibitory ability will be.
出处
《兰州理工大学学报》
CAS
北大核心
2017年第4期132-136,共5页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51168031
51468039)
关键词
复杂环境
钢筋
氯盐腐蚀
极化曲线
交流阻抗
complex environment
reinforcing steel
chloride corrosion
polarization curve
alternatingcurrent impedance
