| 钢筋在混凝土中腐蚀行为的电化学阻抗特征 |
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| 引用本文： | 刘晓敏,史志明,许刚,宋光铃,林海潮,曹楚南.钢筋在混凝土中腐蚀行为的电化学阻抗特征[J].腐蚀科学与防护技术,1999,11(3):161-164. |
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| 作者姓名： | 刘晓敏 史志明 许刚 宋光铃 林海潮 曹楚南 |
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| 作者单位： | 中国科学院金属腐蚀与防护研究所,金属腐蚀与防护国家重点实验室,沈阳,110015 |
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| 摘 要： | 研究了钢筋在混凝土试样和添加Ｃｌ＾－的混凝土试样中的电化学阻抗谱。发现钢筋的阻抗
谱特征随着时间及混凝土成份的不同而发生变化。当阻抗上出现扩散控制的直线段时，表示钢筋开始发生腐蚀。在混凝土试样中钢筋的阻抗谱与在模拟液中的有所不同，主要是在阻抗谱的高频处出现表示Ｃａ（ＯＨ）２沉积膜的容抗弧。
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| 关 键 词： | 钢筋 混凝土 腐蚀 电化学阻抗 |
EIS CHARACTERISTICS OF CORROSION BEHAVIOR OF REBAR IN CONCRETE |
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| LIU Xiaomin,SHI Zhiming,XU Gang,SONG Guangling,LIN Haichao,CAO Chun′nan.EIS CHARACTERISTICS OF CORROSION BEHAVIOR OF REBAR IN CONCRETE[J].Corrosion Science and Protection Technology,1999,11(3):161-164. |
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| Authors: | LIU Xiaomin SHI Zhiming XU Gang SONG Guangling LIN Haichao CAO Chun′nan |
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| Abstract: | The EIS of rebars in concrete without chloride ion and with 0.8mol/L chloride ion were measured. The effects of time and composition of concrete on the characteristics of EIS of rebars were studied. When a straight line, which meant diffusion control, appeared on the EIS, the rebar in concrecte began to corrode. The characteristics of EIS of rebars in concrete were different from those of rebars in simulated pore solutions. There were capacitive loops, which indicated the existence of sedimentary film of Ca(OH)2, in high frequency range. The corresponding equivalent circuits were proposed respectively, which could interpret the corrosion mechanism of rebars in concrete.\= |
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| Keywords: | reinforced concrete corrosion EIS |
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