more>>在线期刊
more>>新闻发布
more>>相关下载
友情连接

氯盐侵蚀下阻锈剂对钢筋阻抗谱及微观形貌研究

徐俊伟，杭美艳*，崔 蕾，董龙瑞
  • 摘要
  • 参考文献
  • 相关文章

2021年 第40卷 第2期: 1000-6281（2021）02-132-06     下载地址：

氯盐侵蚀下阻锈剂对钢筋阻抗谱及微观形貌研究

徐俊伟，杭美艳*，崔  蕾，董龙瑞

（1.内蒙古科技大学 土木工程学院，内蒙古 包头 014010；2.哈尔滨工业大学 土木工程学院，黑龙江 哈尔滨150090 ）

摘  要 为了研究氯盐侵蚀下阻锈剂对钢筋锈蚀的影响，设计制作了钢筋混凝土中掺入不同比例阻锈剂（醇胺类、亚硝酸钙）试件，开展了各试件在3.5%NaCl侵蚀溶液下钢筋锈蚀的电化学阻抗谱和表面微观试验，得到不同比例阻锈剂（醇胺类，亚硝酸钙）对混凝土中钢筋锈蚀的交流阻抗谱曲线及微观形貌图，分析了阻锈剂对钢筋锈蚀过程的影响。研究表明：0.8%醇胺类+0.8%亚硝酸钙阻锈剂的掺入延长了钢筋锈蚀脱钝时间，降低了钢筋锈蚀速率；对比各组微观形貌图发现添加复合阻锈剂的钢筋表面钝化膜致密，未发现锈斑，很好地保护了钢筋，达到了阻锈效果。

关键词  钢筋锈蚀；电化学阻抗谱；SEM；阻锈剂；氯盐侵蚀

中图分类号：TU528     文献标识码：A   doi:10.3969/j.issn.1000-6281.2021.02.006

 

Study on the impedance spectroscopy and microscopic morphology of reinforcing bar influenced bycorrosion inhibitor under chloride attack

XU Jun-wei1，HANG Mei-yan1*，CUI Lei2，DONG Long-rui1

(1.      School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou，Inner Mongolia 014010；2. School of Civil Engineering,Harbin Institute of Technology, Harbin Heilongjiang 150090, China)

Abstract In order to study the effect of rust inhibitor on the corrosion of steel bars under the corrosion of chloride salt, we designed and manufactured specimens of reinforced concrete mixed with different proportions of rust inhibitors (alcohol amines, calcium nitrite), conducted electrochemical impedance spectroscopy and surface microscopic tests of steel corrosion in 3.5%NaClcorrosion solutionand analyzed the influence of rust inhibitor on the corrosion process of steel bars. The impedance spectroscopy curves and microscopic morphology of the corrosion of steel bars in concrete with different proportions of rust inhibitors(alcohol amines, calcium nitrite)are obtained. Studies have shown that the incorporation of 0.8% alcohol amine+0.8% calcium nitrite rust inhibitor prolongs the corrosion and deactivation time of steel bars, reduces the corrosion rate of steel bars; Comparing the microscopic morphology maps of each group, it is found that the passive film on the surface of the steel bar with the compound rust inhibitor is dense, and no rust spots are found, which protects the steel bar well and achieves the rust-inhibiting effect.

Keywords  steel corrosion; electrochemical impedance spectroscopy; SEM; rusty retardant agent; chloride attack

                                    

“全文下载请到同方知网，万方数据库或重庆维普等数据库中下载！”