四探针技术测碳钢在混凝土及混凝土模拟溶液中的局部区域腐蚀行为
Corrosion Behavior of Localized Region of Carbon Steel in Concrete and Simulated Concrete Solution by Four Point Probe Technology
摘 要
采用自制原位腐蚀测试装置, 对碳钢在含NaCl的混凝土模拟溶液和混凝土环境中的方阻和腐蚀深度进行连续监测, 并对不同区域的腐蚀行为进行了分析。结果表明: 在模拟溶液中由于氯离子的直接均匀作用, 碳钢表面各区域的腐蚀情况基本相同, 腐蚀过程三个阶段的方阻和腐蚀深度都遵循二项式曲线规律; 而在混凝土环境中各区域的腐蚀情况不同, 部分区域腐蚀动力学规律与模拟溶液中的相同, 而部分区域的第一阶段方阻和腐蚀深度符合直线规律; 第二、三阶段符合二项式曲线规律。采用方阻法可获得腐蚀过程的动力学规律。
混凝土
混凝土模拟溶液
方阻
腐蚀深度
carbon steel
concrete
simulated concrete solution
sheet resistance
corrosion depth
Abstract
Sheet resistance and corrosion depth of carbon steel were continuously monitored in simulated concrete solution and concrete with NaCl by a self-designed in-situ corrosion measurement system. The corrosion behavior in different regions was analyzed. The results show that corrosion of different regions on the surface of carbon steel in the solution was basically the same because of the direct and uniform function of chloride ion, meanwhile sheet resistance and corrosion depth followed binomial law in three stages of corrosion process. Nevertheless the corrosion of different regions in concrete was different. In some regions, the corrosion kinetics was the same as that in the solution, and in others sheet resistance and corrosion depth agreed with linear law in the first stage, then binomial law in the second and third stage. The kinetics of corrosion process would be acquired by sheet resistance method.
中图分类号 TG174.3
所属栏目
基金项目 教育部科学技术研究重点项目(208068); 国家科技部公益专项课题(2004DIB5J173)
收稿日期 2010/12/6
修改稿日期 2011/9/16
网络出版日期
作者单位点击查看
备注林翠(1976-), 女, 广东蕉岭人, 教授, 博士。
引用该论文: LIN Cui,ZHAO Li-cai,ZHAO Qing,DU Nan,ZHANG San-ping,FENG Chang-jie. Corrosion Behavior of Localized Region of Carbon Steel in Concrete and Simulated Concrete Solution by Four Point Probe Technology[J]. Materials for mechancial engineering, 2011, 35(12): 52～58
林翠,赵立才,赵晴,杜楠,张三平,冯长杰. 四探针技术测碳钢在混凝土及混凝土模拟溶液中的局部区域腐蚀行为[J]. 机械工程材料, 2011, 35(12): 52～58
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参考文献
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【3】ANDRADE C, ALONSO C, SARRIA J.Corrosion rate evolution in concrete structures exposed to the atmosphere[J]. Cemente & Concrete Composites,2002,24:55-64.
【4】TURKMEN I, GAVGALI M.Influence of mineral admixtures on the some properties and corrosion of steel embedded in sodium sulfate solution of concrete[J]. Materials Letters,2003,57:3222-3233.
【5】ANDRADE C, ALONSO C. Corrosion rate monitoring in the laboratory and on-site[J]. Construction and Building Materials, 1996, 10(5): 315-328.
【6】DU A L, HOU W T, ZHANG H W,et al.The linear polarization method for corrosion rate measurement of reinforcing bar of concrete in situ[J]. Electrochemistry,2000,6(3):297-303.
【7】LIU Y P, WEYERS R E.Comparison of guarded and unguarded linear polarization CCD devices with weight loss measurements[J]. Cement and Concrete Research,2003,33:1093-1101.
【8】胡融刚,杜荣归,林昌健. 氯离子侵蚀下钢筋在混凝土中腐蚀行为的EIS研究[J]. 电化学,2003,9(2):189-195.
【9】刘新福,孙以材,刘东升.四探针技术测量薄层电阻的原理及应用[J].半导体技术,2004,29(7):48-52.
【10】BENJAMIN M C, HILLARD R J, BORLAND J O.Ultra-shallow Junction (USJ) sheet resistance measurements with a non-penetrating four point probe[J]. Nuclear Instruments and Methods in Physics Research Section B:Beam Interactions with Materials and Atoms,2005,237(1/2):315-355.
【11】刘新福,孙以材,张艳辉,等.用改进的Rymaszewski公式及方形四探针法定微区的方块电阻[J]. 物理学报,2004,53(8):2461-2465.
【12】冯长杰,杜楠,李新义,等.一种连续监测板状金属材料微区腐蚀深度分布的夹具:中国,200810107312.7[P]. 2009-03-25.
【13】杜楠,冯长杰,赵晴,等.一种连续监测金属材料微区腐蚀深度分布的方法: 中国,200810107311.2[P].2009-03-25.
【14】廖国胜,刘启华.钢筋混凝土中氯离子侵蚀探讨[J]. 山西建筑,2005,31(17):142-150.
【15】杜洪彦,邱富荣,林昌健.混凝土的腐蚀机理与新型防护技术[J]. 腐蚀科学与防护技术,2001,13(3):156-161.
【16】任昭君,孙志伟,赵铁军.混凝土中钢筋的锈蚀机理及检测技术[J]. 工程建设,2007,39(5):11-15.
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