摘要
为了更多地掌握不锈钢在混凝土中表面形成的钝化膜对其腐蚀的影响,以溶液模拟不锈钢所处的环境条件,利用动电位扫描测量技术及Mott-Schottky曲线研究了316,2205不锈钢钢筋和Q235碳钢钢筋的耐蚀性能及其钝化膜的半导体特性。结果表明:在模拟的混凝土孔隙溶液中316,2205不锈钢钢筋表面形成了p型半导体钝化膜,其耐蚀性远高于Q235钢钢筋形成的n型半导体钝化膜;2205不锈钢表面钝化膜的耐蚀性优于316不锈钢表面的钝化膜。
A simulated concrete pore solution was used to simulate the working environment of stainless steel reinforcing bar so as to reveal the effect of surface passivation film on the corrosion behavior of the stainless steel in concrete. Namely, the corrosion resistance of Q235 carbon steel reinforcing bar,316 and 2205 stainless steel reinforcing bars in the simulated concrete pore solution as well as the semi-conductive performance of the passivation films on the three kinds of steel was investigated with potentiodynamic scanning technique and Mott-Schottky curve as well. Results indicated that n-type semiconductor passivation film was formed on the surface of 316 and 2205 stainless steels reinforcing bars tested in the simulated concrete pore solution,and the n-type semiconductor passivation film had much better corrosion resistance than p-type semiconductor passivation film formed on the surface of the carbon steel reinforcing bar. In the meantime, the passivation film formed on the surface of 2205 stainless steel reinforcing bar possessed better corrosion resistance than that formed on the surface of 316 stainless steel reinforcing bar.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第10期58-59,62,共3页
Materials Protection
基金
国家科技支撑计划项目(2011BAG07B04)资助
关键词
钝化行为
半导体特性
耐蚀性能
不锈钢
钢筋
混凝土孔隙模拟液
passivation behavior
semi-conductive performance
corrosion resistance
stainless steel
reinforcing bar
simulated concrete pore solution
作者简介
陈龙（1979-），工学硕士，高级工程师，主要从事海洋工程耐久性技术研究与应用工作，电话：020—22318121，E—mml：clongl@gzpcc．com
