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Effectiveness of inhibitors in increasing chloride threshold value for steel corrosion

ISSN号：1672-5913
期刊名称：《计算机教育》
时间：0
分类：TQ172.12[化学工程—水泥工业;化学工程—硅酸盐工业] U473.71[机械工程—车辆工程;交通运输工程—载运工具运用工程;交通运输工程—道路与铁道工程]
作者机构：[1]College of Mechanics and Materials, Hohai University, Nanjing 210098, P. R. China, [2]Shenzhen Durability Center for Civil Engineering, Shenzhen University, Shenzhen 518060, P. R. China
相关基金：This work was supported by the National Natural Science Foundation of China （Grants No. 51278168 and 51278167）, the China Postdoctoral Science Foundation Funded Project （Grant No. 2010048 1082）, the China Postdoctoral Science Foundation Special Funded Project （Grant No. 201104544）, the Jiangsu Planned Projects for Postdoctoral Research Funds （Gram No. 1002019B）, the Qing Lan Project, and the Opening Project of Shenzhen Durability Center for Civil Engineering, Shenzhen University （Grant No. SZDCCE11-03）.

作者： Jin-xia XU[1], Lin-hua JIANG[1], Wei-lun WANG[2], Li TANG[2], Li CUI[1]

关键词：腐蚀抑制剂, 钢筋锈蚀, 氯离子, 阈值, 阳极型缓蚀剂, Ca（OH）2, 电化学阻抗谱, 腐蚀电流密度, steel corrosion, chloride threshold value, electrochemical impedance spectra （EIS）,corrosion inhibitor

中文摘要：

这调查针对在为钢腐蚀增加氯化物阀值价值评估腐蚀禁止者的有效性。腐蚀禁止者的三种类型，钙亚硝酸根(Ca (没有 ₂)₂), 锌氧化物(ZnO ) ，和 N， N′-dimethylaminoethanol (DMEA ) 它分别地代表了阳极的禁止者， cathodic 禁止者，和混合禁止者，被选择。实验在浸透的氢氧化钙被执行(Ca (哦) 模仿水泥的电解环境的 ₂) 答案。禁止者开始在不同层次被混合，然后氯化物离子逐渐地在几步被增加进答案。开电路的潜力(E _corr) 和腐蚀水流密度(我 _{电气化学的阻抗系列(EIS ) 决定的 corr}) 被用来识别活跃腐蚀的开始，从而决定氯化物阀值价值。尽管所有禁止者在减少是有效的，它被发现那钢加强的腐蚀率，他们在增加氯化物阀值价值上有边缘的效果。

英文摘要：

This investigation was aimed at evaluating the effectiveness of corrosion inhibitors in increasing the chloride threshold value for steel corrosion. Three types of corrosion inhibitors, calcium nitrite （Ca（NO2）2）, zinc oxide （ZnO）, and N,N＇-dimethylaminoethanol （DMEA）, which respectively represented the anodic inhibitor, cathodic inhibitor, and mixed inhibitor, were chosen. The experiment was carried out in a saturated calcium hydroxide （Ca（OH）2） solution to simulate the electrolytic environment of concrete. The inhibitors were initially mixed at different levels, and then chloride ions were gradually added into the solution in several steps. The open-circuit potential （Ecorr） and corrosion current density （lcorr） determined by electrochemical impedance spectra （EIS） were used to identify the initiation of active corrosion, thereby determining the chloride threshold value. It was found that although all the inhibitors were effective in decreasing the corrosion rate of steel reinforcement, they had a marginal effect on increasing the chloride threshold value.

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