| 桥梁用混凝土钢筋腐蚀动力学机理 |
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| 引用本文： | 肖忠良,马志超,王磊,张建仁.桥梁用混凝土钢筋腐蚀动力学机理[J].长沙理工大学学报(自然科学版),2012(2):25-30. |
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| 作者姓名： | 肖忠良 马志超 王磊 张建仁 |
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| 作者单位： | 长沙理工大学电力与交通材料保护湖南省重点实验室化学与生物工程学院;长沙理工大学桥梁工程湖南省重点实验室土木与建筑学院 |
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| 基金项目： | 桥梁工程湖南省重点实验室、电力与交通材料保护湖南省重点实验室开放基金资助项目(2012CL08) |
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| 摘 要： | 应用塔菲尔极化曲线和开路电位等电化学方法,研究了钢筋混凝土试件在不同直流电压和不同质量分数的氯化钠溶液环境中快速锈蚀过程,分析处于混凝土环境中的钢筋快速锈蚀的动力学机理.研究结果表明,在外加电压分别为1,2V的快速锈蚀中,钢筋混凝土在腐蚀的0～5h时,腐蚀速率随着时间增加逐渐增大;当腐蚀时间在15～20h时,腐蚀速率达到最大;腐蚀速度随氯离子质量分数的增加而增大,当外加电压为2V且氯离子质量分数为5%时,其腐蚀速率高达83.89mm/a.
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| 关 键 词： | 电化学快速锈蚀 钢筋混凝土 动力学 塔菲尔极化曲线 |
Corrosion dynamics mechanism of concrete steel used in bridge |
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| XIAO Zhong-liang,MA Zhi-chao,WANG Lei,ZHANG Jian-ren.Corrosion dynamics mechanism of concrete steel used in bridge[J].Journal of Changsha University of Science and Technology:Natural Science,2012(2):25-30. |
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| Authors: | XIAO Zhong-liang MA Zhi-chao WANG Lei ZHANG Jian-ren |
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| Affiliation: | 1.Key Laboratory of Materials Protection for Electric Power and Transportation of Hunan Province, School of Chemistry and Biological Engineering,Changsha University of Science and Technology, Changsha 410004;2.Bridge Project Key Laboratories of Hunan Province,School of Civil Engineering and Architecture,Changsha University of Science and Technology,Changsha 410004) |
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| Abstract: | The mechanism of rapid corrosion process of concrete iron under DC voltage was investigated by Tafel polarization curve,opens potential etc.method.The results show that the corrosion rate of the reinforced concrete in 0 ~ 5 hrs increase with time gradually,and reach maximum in 15~20 hrs,then decreases.The corrosion rate increases with the quality of chloride ion fraction increased,under an external 2 V DC voltage,and mass fraction of chloride ions was 5%,the corrosion rate is maximum 83.89 mm/a. |
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| Keywords: | electrochemical acceleration concrete dynamics Tafel polarization curves |
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