| 钢筋表面微区电位分布的原位测量 |
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| 引用本文： | 李彦,杜荣归,邵敏华,胡融刚,林玉华,林昌健.钢筋表面微区电位分布的原位测量[J].厦门大学学报(自然科学版),2004,43(1):138-140. |
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| 作者姓名： | 李彦 杜荣归 邵敏华 胡融刚 林玉华 林昌健 |
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| 作者单位： | 厦门大学化学系,物理化学研究所,固体表面物理化学国家重点实验室,福建,厦门,361005 |
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| 基金项目： | 国家自然科学基金(20127302)，福建省自然科学基金(E0210006)资助 |
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| 摘 要： | 应用自行研制的扫描微参比电极联机测量系统,原位测量了钢筋在模拟混凝土孔隙液中表面微区电位分布.结果表明,钢筋在纯饱和Ca(OH)2溶液中处于钝态.当溶液的pH降低和外加Cl-时,钢筋表面微区电位分布即发生变化,电位差变大,钢筋表面随之发生点腐蚀.
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| 关 键 词： | 钢筋 电位分布 点腐蚀 扫描微参比电极 |
| 文章编号： | 0438-0479(2004)01-0138-03 |
| 修稿时间： | 2003年1月20日 |
In-Situ Measurement of Potential Distribution on Surface of Reinforcing Steel in Simulated Concrete Pore Solution |
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| LI Yan,DU Rong-gui,SHAO Min-hua,HU Rong-gang,LIN Yu-hua,LIN Chang-jian Chem. of Solid Sur.,Xiamen Univ.,Xiamen ,China.In-Situ Measurement of Potential Distribution on Surface of Reinforcing Steel in Simulated Concrete Pore Solution[J].Journal of Xiamen University(Natural Science),2004,43(1):138-140. |
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| Authors: | LI Yan DU Rong-gui SHAO Min-hua HU Rong-gang LIN Yu-hua LIN Chang-jian Chem of Solid Sur Xiamen Univ Xiamen China |
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| Institution: | LI Yan,DU Rong-gui~*,SHAO Min-hua,HU Rong-gang,LIN Yu-hua,LIN Chang-jian Chem. of Solid Sur.,Xiamen Univ.,Xiamen 361005,China) |
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| Abstract: | A scanning micro-reference-electrode technique controlled by micro-computer was used to (measure) the potential distribution on the surface of the reinforcing steel and to study the pitting initiation in early stage of the reinforcing steel in chloride-free and chloride-contaminated simulated concrete pore (solutions). The results showed that the reinforcing steel exhibited different corrosion characteristics in the different solutions. There were some unstable micro-pitting nuclei on the surface of the steel in the pure (Ca(OH)_2) solution and the steel remained passivated. However, the potential distribution on the surface of the reinforcing steel varied considerably and the pitting corrosion occurred on the steel when a sufficient quantity of Cl~- was added to the solution and pH fell. |
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| Keywords: | reinforcing steel potential distribution scanning micro reference electrode pitting corrosion |
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