• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Imidazolium-based ionic liquids as modulators of corrosion inhibition of SDS on mild steel in hydrochloric acid solutions: experimental and theoretical studies
【24h】

Imidazolium-based ionic liquids as modulators of corrosion inhibition of SDS on mild steel in hydrochloric acid solutions: experimental and theoretical studies

机译：咪唑基离子液体作为缓蚀剂对盐酸溶液中低碳钢的SDS腐蚀的调节剂：实验和理论研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The inhibition performance of six cationic ionic liquids (ILs); 1-ethyl-3-methylimidazolium chloride (EMIm Cl), 1-butyl-3-methylimidazolium chloride (BMIm Cl), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIm PF6), 1-butyl-3-methylimidazolium tetrafluoroborate (BMIm BF4), 1-butyl-3-methylimidazolium bromide (BMIm Br), and 1-hexyl-3-methylimidazolium chloride (HMIm Cl) and their mixtures with an anionic surfactant, sodium dodecyl sulfate (SDS), was investigated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), atomic force microscopy (AFM), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FT-IR) and quantum chemical calculations. Using these ILs, which differ in counter ion or chain length, allowed investigation of counter ion types and tail length effects on inhibition efficiency. The results show that formation of a three-dimensional hydrogen bond network between imidazolium rings and their counter ions can effect the corrosion behavior on mild steel. Among the studied ILs, HMIm Cl exhibited the best inhibition efficiency. Moreover, the theoretical quantitative structure activity relationship (QSAR) methods were used to predict the inhibition efficiency. Solutions of ILs/SDS mixtures showed good inhibition properties compared to solutions of individual surfactant and ILs, due to strong adsorption on the metal surface and formation of a protective film. In ILs/SDS mixed systems, the attractive electrostatic interaction between them is an advantage for vesicle or wormlike micelle formation, leading to an increase in inhibition efficiency. It is clear from the DLS results that the average aggregate size appears to increase with increasing chain length. The interaction between ILs/SDS on the metal surface (in the solid-liquid interface) was analyzed on the basis of regular solution theory. The results demonstrated that attractive interactions between ILs and SDS were strong in the solid-liquid interface. The flow effect was studied using a rotating disc electrode (RDE). The results confirmed that aggregates formed of ILs/SDS interaction are not stable and separated from the surface under flow condition. Metal surface characterization was performed using AFM and FT-IR. Potentiodynamic polarization investigations indicated that the studied inhibitors were mixed type inhibitors. Adsorption of the inhibitors on the mild steel surface obeyed the Langmuir adsorption isotherm. Furthermore, adsorption (Delta G(ads)(0)) free energy in mixtures decreased compared to single ones.
机译：六种阳离子液体的抑制性能; 1-乙基-3-甲基咪唑氯化物（EMIm Cl），1-丁基-3-甲基咪唑氯化物（BMIm Cl），1-丁基-3-甲基咪唑六氟磷酸盐（BMIm PF6），1-丁基-3-甲基咪唑四氟硼酸盐（BMIm BF4 ），1-丁基-3-甲基咪唑鎓溴化物（BMIm Br）和1-己基-3-甲基咪唑鎓氯化物（HMIm Cl）及其与阴离子表面活性剂十二烷基硫酸钠（SDS）的混合物，采用电化学阻抗谱法进行了研究（ EIS），电位动力学极化（PDP），原子力显微镜（AFM），动态光散射（DLS），傅立叶变换红外光谱（FT-IR）和量子化学计算。使用这些抗衡离子或链长不同的IL，可以研究抗衡离子类型和尾长对抑制效率的影响。结果表明，在咪唑环及其反离子之间形成三维氢键网络可以影响低碳钢的腐蚀行为。在研究的IL中，HMIm Cl表现出最佳的抑制效率。此外，使用理论定量结构活性关系（QSAR）方法来预测抑制效率。与单独的表面活性剂和ILs的溶液相比，ILs / SDS混合物的溶液显示出良好的抑制性能，这是由于在金属表面上的强烈吸附和保护膜的形成。在ILs / SDS混合系统中，它们之间有吸引力的静电相互作用是形成囊泡或蠕虫状胶束的优势，从而提高了抑制效率。从DLS结果可以明显看出，平均骨料大小似乎随着链长的增加而增加。根据常规溶液理论分析了金属表面（在固液界面上）的ILs / SDS之间的相互作用。结果表明，在固液界面中，IL和SDS之间的吸引作用很强。使用旋转圆盘电极（RDE）研究了流动效果。结果证实，由ILs / SDS相互作用形成的聚集体在流动条件下不稳定并且与表面分离。金属表面表征使用AFM和FT-IR进行。电位动力极化研究表明，所研究的抑制剂是混合型抑制剂。缓蚀剂在低碳钢表面上的吸附遵循Langmuir吸附等温线。此外，与单一混合物相比，混合物中的吸附（Delta G（ads）（0））自由能降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号