Effects of Alkali Slag Activator on Formation and Damage of Passive Film on Steel Bars
摘 要
采用电化学阻抗谱研究了普通钢筋和耐蚀钢筋在氢氧化钠、硅酸钠、硫酸钠、碳酸钠四种碱激发剂溶液中的钝化和脱钝行为,并采用饱和氢氧化钙溶液模拟普通混凝土的孔隙溶液作为对照。结果表明:钢筋钝化膜的形成和破坏过程高度依赖于激发剂种类和pH;水玻璃溶液中钢筋钝化膜最为稳定并具有良好的抗氯离子侵蚀能力,硫酸钠溶液中钢筋出现自腐蚀现象;相对于普通钢筋,耐蚀钢筋可以更加快速地形成钝化膜,并且其抗氯离子侵蚀性能更好。
Abstract
Electrochemical impedance spectroscopy was adopted to characterize the passivation and depassivation behavior of ordinary steel bars and corrosion resistant steel bars in four kinds of alkali activator solutions of sodium hydroxide, sodium silicate, sodium sulfate and sodium carbonate. And saturated calcium hydroxide solution was used as a simulated pore solution in ordinary concrete for comparative study. The results show that the formation process and destruction process of steel bar passive films were highly relied on the type and pH value of activator. The steel bar passive film forming in Na2SiO3 solution was the most stable passive film and had the best ability to resist chloride corrosion. The steel bars self-corroded in Na2SO4 solution. Compared with ordinary steel bars, corrosion resistant steel bars can form passive film more quickly and had better corrosion resistance.
中图分类号 TG172 DOI 10.11973/fsyfh-201808005
所属栏目 试验研究
基金项目 国家自然科学基金(51378269;51678318);铁道部科研计划(2014G004-F)
收稿日期 2017/4/10
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: DU Yujiao,JIN Zuquan,CHEN Yongfeng. Effects of Alkali Slag Activator on Formation and Damage of Passive Film on Steel Bars[J]. Corrosion & Protection, 2018, 39(8): 592
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】陈乔,丛钢,杨长辉. 碱矿渣混凝土氯离子渗透及钢筋腐蚀性能[J]. 混凝土,2009,236(6):59-61.
【2】APERADOR W,MEJÍA DE GUTIÉRREZ R,BASTIDAS D M. Steel corrosion behaviour in carbonated alkali-activated slag concrete[J]. Corrosion Science,2009,51(9):2027-2033.
【3】APERADOR W,RUÍZ E,DELGADO A. Electrochemical impedance spectroscopy analysis on steel embedded in a concrete alkali exposed on the chloride media[J]. International Journal of Electrochemical Science,2014,9:7506-7517.
【4】JAMIL H E,SHRIRI A,BOULIF R,et al. Corrosion behavior of reinforced steel exposed to an amino alcohol-based corrosion inhibitor[J]. Cement and Concrete Composites,2005,27(6):671-678.
【5】STERN M,GEARY A L. Electrochemical polarization:theoretical analysis of the shape of polarization curves[J]. Journal of Electrochemical Society,1957,104(1):56-63.
【6】曹楚南. 腐蚀电化学原理[M]. 3版. 北京:化学工业出版社,2008:122-123,179-184.
【2】APERADOR W,MEJÍA DE GUTIÉRREZ R,BASTIDAS D M. Steel corrosion behaviour in carbonated alkali-activated slag concrete[J]. Corrosion Science,2009,51(9):2027-2033.
【3】APERADOR W,RUÍZ E,DELGADO A. Electrochemical impedance spectroscopy analysis on steel embedded in a concrete alkali exposed on the chloride media[J]. International Journal of Electrochemical Science,2014,9:7506-7517.
【4】JAMIL H E,SHRIRI A,BOULIF R,et al. Corrosion behavior of reinforced steel exposed to an amino alcohol-based corrosion inhibitor[J]. Cement and Concrete Composites,2005,27(6):671-678.
【5】STERN M,GEARY A L. Electrochemical polarization:theoretical analysis of the shape of polarization curves[J]. Journal of Electrochemical Society,1957,104(1):56-63.
【6】曹楚南. 腐蚀电化学原理[M]. 3版. 北京:化学工业出版社,2008:122-123,179-184.
相关信息