| 钢筋在混凝土模拟孔隙液中腐蚀电化学行为 |
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| 引用本文： | 刘晓敏,史志明,林海潮,宋光铃,曹楚南.钢筋在混凝土模拟孔隙液中腐蚀电化学行为[J].腐蚀科学与防护技术,1997,9(2):56-59. |
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| 作者姓名： | 刘晓敏 史志明 林海潮 宋光铃 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 |
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| 基金项目： | 国家自然科学基金,中国科学院“百人计划”资助 |
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| 摘 要： | 采用动电位极化曲线法研究了钢筋在混凝土模拟孔隙液中腐蚀电化学行为.结果表明:随着Cl-离子浓度升高,PH值下降,腐蚀电流(Icorr)增大,破裂电位(En)降低:致使钢筋表面钝化膜破裂的临界Cl-离子浓度与孔隙液的pH值之间存在对数关系.提出了Cl-和OH-在钝化膜局部区域上的竞争吸附模型,并解释了实验结果.
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| 关 键 词： | 钢筋 混凝土 模拟孔隙液 腐蚀 电化学保护 |
| 收稿时间： | 1997-03-25 |
| 修稿时间： | 1997-03-25 |
ELECTROCHEMICAL CORROSION BEHAVIOR OF REBAR IN SIMULATED PORE SOLUTION |
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| LIU Xiaomin,SHI Zhiming,LIN Haichao,SONG Guangling,CAO Chu''''nan.ELECTROCHEMICAL CORROSION BEHAVIOR OF REBAR IN SIMULATED PORE SOLUTION[J].Corrosion Science and Protection Technology,1997,9(2):56-59. |
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| Authors: | LIU Xiaomin SHI Zhiming LIN Haichao SONG Guangling CAO Chu'nan |
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| Abstract: | The electrochemical corrosion behavior of rebar in simulated pore solution was studied by potentiodynamic polarization. The critical relationship between pH and the concentration of chloride ion was obtained. The relationship is explained by competitive adsorption of chloride ions and hydroxide ions for local area on the passive film. The corrosion rate(I corr ) increased however the breakdown potential of passive film (E b) decreased with the increase of the concentration of chloride ion (C Cl - ) and the decrease of pH. |
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| Keywords: | rebar simulated proe solution potentiodynamic polarization curve |
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