迁移性阻锈剂的优化及渗透阻锈性能

发布时间：2018-07-03 08:45

本文选题：迁移性阻锈剂 + 阻锈性能　；参考：《硅酸盐学报》2016年03期

【摘要】：研究了迁移性阻锈剂(MCI)在氯盐溶液中的阻锈效果和在混凝土中的传输阻锈性能,基于阻锈效果和传输性能对MCI组成进行优化。结果表明:优化后的MCI(PCI-2015)在1%(质量分数)氯盐溶液中添加2%PCI-2015 1 d后,可使钢筋腐蚀电流密度(Icorr)降低到0.02μA/cm2以下,并维持至28 d以上;其在立方体试件中渗透5 d的质量吸收率是优化前的6.78倍,在棱柱体试件中渗透5 d时,在70 mm高度处的氮含量为702 mg/kg;在含氯盐混凝土中渗透12 h后,可使钢筋Icorr降低到0.1μA/cm2以下。表明PCI-2015在混凝土中具有优异的传输阻锈性能。采用原子力显微镜和X光电子能谱研究了在氯盐溶液中添加PCI-2015后碳钢的微观形貌及表面元素,MCI分子可排除碳钢表面的氯离子,从而有效抑制碳钢锈蚀或使锈蚀碳钢修复。
[Abstract]:The corrosion inhibition effect of mobile rust inhibitor (MCI) in chloride solution and its transport resistance in concrete were studied. The composition of MCI was optimized on the basis of rust inhibition effect and transport performance. The results showed that the corrosion current density (Icorr) of steel bar decreased to below 0.02 渭 A/cm2 after adding 2PCI-2015 to 1% (mass fraction) chloride solution for 1 d, and maintained to more than 28 days after the optimized MCI (PCI-2015) was added to 1% (mass fraction) chloride solution. The mass absorptivity was 6.78 times higher than that before the optimization, and the nitrogen content at 70 mm height was 702 mg / kg at 70 mm height, and 12 h after penetration in chloride concrete, and the mass absorptivity was 6.78 times higher than that before the optimization, and the nitrogen content at 70 mm height was 702 mg / kg at 70 mm height in the prism specimen for 5 days. The steel bar Icorr can be reduced to less than 0. 1 渭 A/cm2. The results show that PCI-2015 has excellent transmission rust resistance in concrete. Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) were used to study the microstructure of carbon steel after the addition of PCI-2015 in chloride solution and the elimination of chloride ions on the surface of carbon steel by MCI molecule. Therefore, corrosion of carbon steel or repair of corroded carbon steel can be effectively inhibited by atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS).
【作者单位】：烟台大学土木工程学院;
【基金】：国家自然科学基金(51278443) 烟台大学研究生创新基金(01075)资助
【分类号】：TU528

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