缓蚀剂对混凝土模拟液中HRBF500钢筋耐蚀性的影响

发布时间：2018-03-29 15:06

  本文选题：HRBF钢筋　切入点：缓蚀剂　出处：《建筑材料学报》2016年06期

【摘要】：应用动电位极化、交流阻抗谱(EIS)、Mott-Schottky曲线测量及扫描电镜(SEM)观察,研究了缓蚀剂D-葡萄糖酸钠(SD)、苯并三氮唑(BTA)、亚硝酸钠(SN)对含质量分数为3.5%NaCl的模拟混凝土孔隙液(SCP溶液)中细晶高强钢筋(HRBF500钢筋)耐蚀性的影响,并与文献报道的此类缓蚀剂对碳素钢筋的缓蚀效果进行了比较.结果表明:在SCP溶液中添加SD后,HRBF500钢筋的腐蚀过程受到抑制,阻抗增大,钝化膜为n型半导体,载流子密度降低,钢筋表面光整致密;添加BTA后,HRBF500钢筋的各项电化学指标下降,钢筋表面布满腐蚀坑;添加SN后,HRBF500钢筋的腐蚀过程也受到抑制.SD,SN可作为HRBF500钢筋的缓蚀剂;BTA不适合作为HRBF500钢筋的缓蚀剂,不同于其对碳素钢筋的缓蚀作用.
[Abstract]:Potentiodynamic polarization, EISTS-Schottky curve measurement and SEM observation were used. The effects of corrosion inhibitors such as sodium gluconate, benzotriazole, sodium nitrite and sodium nitrite on the corrosion resistance of high strength fine grain steel bar (HRBF500) in simulated concrete pore solution with mass fraction of 3.5%NaCl were studied. The corrosion inhibition effect of this kind of inhibitor on carbon steel bar was compared with that reported in the literature. The results showed that the corrosion process of HRBF500 steel bar was inhibited by adding SD in SCP solution, the impedance was increased, and the passivation film was n type semiconductor. The density of carrier decreases, the surface of steel bar is smooth and compact, the electrochemical index of steel bar HRBF500 decreases after adding BTA, and the surface of steel bar is covered with corrosion pits. The corrosion process of HRBF500 steel bar after adding SN is also inhibited. SD-SN can be used as the corrosion inhibitor of HRBF500 steel bar. It is not suitable for the corrosion inhibitor of HRBF500 steel bar, which is different from its corrosion inhibition effect on carbon steel bar.
【作者单位】： 厦门理工学院材料科学与工程学院;福建省功能材料及应用重点实验室;华侨大学土木工程学院;
【基金】：国家自然科学基金资助项目(51408517,51578255) 福建省科技计划重点项目(2014Y0033)
【分类号】：TG174.42
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本文编号：1681657