利用电渗的方法评价渗透迁移型钢筋阻锈剂的效能
Inhibition Efficiency of Migration Corrosion Inhibitors Assessed by Electro-osmosis Method
摘 要
钢筋混凝土阻锈剂是提高钢筋混凝土耐久性的一项重要技术.本工作利用电渗的方法快速评价渗透迁移型钢筋混凝土阻锈剂(MCI)的效能.采用32V的电渗电压促使氯离子快速渗透(ACIM)到钢筋表面并引起钢筋腐蚀,然后采用线性极化法对钢筋腐蚀状态进行测试,最后以阻锈剂的抗氯离子渗透性能和阻锈效能来评价阻锈剂的综合效能.结果表明,氯离子的快速渗透和电化学测试仅需几天的时间,试验结果很好地反映不同阻锈剂掺量的阻锈效能,是一种适合于工程建设需要的快速评价方法.
阻锈剂
加速氯离子渗透
steel reinforced concrete
inhibitor
accelerated chloride ion migration
Abstract
Corrosion inhibitor is one of the most important technologies to enhance the durability of steel reinforced concrete.A fast evaluation technique of electro-osmosis was used to assess the inhibitor efficiency by using a 32 V electric field to accelerate the chloride ion migration (ACIM)in concrete and induce corrosion.Potentiodynamic polarization scanning tests were used to evaluate the corrosion states.The comprehensive efficiency of inhibitors should be assessed in resistance to chloride ion permeability and the anti-corrosion efficiency.The time of testing was about four days and the results clearly showed the differences of inhibition efficiency.
中图分类号 TU593 TG174.3
所属栏目 试验研究
基金项目
收稿日期 2009/8/24
修改稿日期 2009/9/9
网络出版日期
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备注翁端,教授.
引用该论文: GENG Chun-lei,WENG Duan,XU Yong-mo. Inhibition Efficiency of Migration Corrosion Inhibitors Assessed by Electro-osmosis Method[J]. Corrosion & Protection, 2010, 31(7): 528～531
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参考文献
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【2】Ormellese M,Berra M,Bolzoni F,et al.Corrosion inhibitors for chlorides induced corrosion in reinforced concrete structures[J].Cement and Concrete Research,2006,36:536-547.
【3】Berke N S,Hicks M C.Predicting long-term durability of steel reinforced concrete with calcium nitrite corrosion inhibitor[J].Cement & Concrete Composites,2004,26:191-198.
【4】Fedrizzia L,Azzolinib F,Bonora P L.The use of migrating corrosion inhibitors to repair motorways′concrete structures contaminated by chlorides[J].Cement and Concrete Research,2006,35:551-561.
【5】Malik A U,Andijani I,Al-Moaili F,et al.Studies on the performance of migratory corrosion inhibitors in protection of rebar concrete in Gulf seawater environment[J].Cement & Concrete Composites,2004,26:235-242.
【6】姬永生,袁迎曙.干湿循环作用下氯离子在混凝土中的侵蚀过程分析[J].工业建筑,2006,36(12):16-23.
【7】Polder R B,Peelen W H A.Characterisation of chloride transport and reinforcement corrosion in concrete under cyclic wetting and drying by electrical resistivity[J].Cement & Concrete Composites,2002,24:427-435.
【8】Aitcin P C.The durability characteristics of high performance concrete:a review[J].Cement & Concrete Composites,2002,25:409-420.
【9】耿欧,李果,袁迎曙.化学检验技术在混凝土内钢筋腐蚀研究中的应用现状与展望[J].混凝土,2005,184(2):20-23.
【10】Song G L.Theoretical analysis of the measurement of polarization resistance in reinforced concrete[J].Cement & Concrete Composites,2000,22:407-415.
【11】Tang L P,Nilsson L O.Rapid determination of the chloride diffusivity in concrete by applying an electrical field[J].ACI Material Journal,1992,89(1):49-53.
【12】Jones M R,Dhir R K,Gill J P.Concrete surface treatment:effect of exposure temperature on chloride diffusion resistance[J].Cement and Concrete Research,1995,25:197-208.
【13】Xu Y M,She H L,Boris A.Miksic,Comparative Study of Inhibitors MCI and Sodium Nitrite in Carbonation and Chloride Induced Corrosion of Steel in Concrete[J].Materials Performance,2004,(1):42-46.
【14】Geng C L,Xu Y M,Weng D.A new method to quickly assess inhibitor efficiency[J].Journal of Wuhan University of Technology-Materials Science Edition,2008,23(6):950-954.
【15】赵冰,杜荣归,林昌健.三种有机缓蚀剂对钢筋阻锈作用的电化学研究[J].电化学,2005,11(4):382-386.
【16】Anna K Y,Jung H S,Kim H S,et al.Effect of calcium nitrite-based corrosion inhibitor in preventing corrosion of embedded steel in concrete[J].Cement and concrete research,2006,36:530-535.
【17】Zornoza E,Paya J,Garces P.Chloride-induced corrosion of steel embedded in mortars containing fly ash and spent cracking catalyst[J].Corrosion Science,2008,50:1567-1575.
【18】Choi Y S,Kim J G,Lee K M.Corrosion behavior of steel bar embedded in fly ash concrete[J].Corrosion Science,2006,48:1733-1745.
【19】白新德,耿怀之,路新瀛,等.屏蔽环技术可行性的理论及实验检测[J].建筑科学,2002,18(5):36-39.
【20】Pour-Ghaz M,Burkan Isgor O,Ghods P.The effect of temperature on the corrosion of steel in concrete.Part 1:Simulated polarization resistance tests and model development[J].Corrosion Science,2009,51:415-425.
【21】Castellote M,Andrade C,Alonso C.Accelerated simultaneous determination of the chloride depassivation threshold and of the non-stationary diffusion coefficient values[J].Corrosion Science,2002,44:2409-2424.
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