应变对混凝土孔隙液中不锈钢钝化性能影响的电化学研究  

Effect of Strain on Passivation of Stainless Steel in a Simulated Concrete Pore Solution

作　　者：冯兴国[1] 卢向雨[2] 左禹[3] 陈达[1] 

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,南京210098 [2]江苏科技大学材料科学与工程学院,镇江212003 [3]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国腐蚀与防护学报》2015年第4期372-378,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(51301060);高等学校学科创新引智计划项目(B12032);水利部公益性行业科研专项经费项目(201301052);中央高校基本科研业务费专项项目(2013B03514)资助

摘　　要：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。Passivation behavior of a deformed stainless steel in a simulated concrete pore solution was studied by means of open circuit potential （OCP）, electrochemical impedance spectroscopy （EIS）, and Mott-Schottky plots. The results show that with the increasing strain, the OCP and im- pedance of the steel decreased, whereas the concentration of oxygen vacancy in passive films in- creased. This result suggests that the passivation of the stainless steel is degraded by the increasing strain. In addition, the difference in passivation between the deformed samples would not be dimin- ished with the increasing immersion time.

关 键 词：不锈钢 混凝土孔隙液 钝化 Mott-Schottky 

分 类 号：TU511[建筑科学—建筑技术科学]