Characterization of the passive film formed on the reinforcement surface in alkali activated fly ash: Surface analysis and electrochemical evaluation
Characterization of the passive film formed on the reinforcement surface in alkali activated fly ash: Surface analysis and electrochemical evaluation
复制标题
碱活化粉煤灰增强材料表面形成的钝化膜的表征：表面分析和电化学评估
DOI：
10.1016/j.corsci.2019.108393
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发表时间：
2020-04-01
影响因子：
8.3
通讯作者：
Yu, Qijun
中科院分区：
文献类型：
--
作者：
Chen, Rui;Hu, Jie;Yu, Qijun
由于孔隙溶液中离子类型和浓度的不同，碱激活粉煤灰（AAFA）中钢材表面的钝化膜具有不同的特性。在这项研究中，通过表面分析和电化学测量研究了模拟 AAFA 孔隙溶液中形成的钝化膜。在模拟 AAFA 孔隙溶液中，钝化膜具有双层结构，外层富含 FeOOH，内层富含 FeO。此外，在钢表面形成牢固吸附的类沸石层（200 nm）。形成更具保护性的钝化膜和吸附层，导致增强体在模拟 AAFS 孔隙溶液中具有更高的耐腐蚀性。
Due to different ion types and concentration in pore solution, the passive film on the steel surface possesses different characteristics in alkali-activated fly ash (AAFA). In this study, the passive film formed in simulated AAFA pore solution was investigated by surface analysis and electrochemical measurements. The passive film possessed bilayer structure with FeOOH-rich outer layer and FeO-rich inner layer in simulated AAFA pore solution. Further, a firmly adsorbed zeolite-like layer (200 nm) formed on the steel surface. The formation of more protective passive film and adsorbed layer resulted in higher corrosion resistance of the reinforcement in simulated AAFS pore solution.