新型香豆素对盐酸溶液中低碳钢腐蚀的抑制作用

Inhibition of Mild Steel Corrosion in Hydrochloric Acid Solution by New Coumarin.

作者信息

Kadhum Abdul Amir H, Mohamad Abu Bakar, Hammed Leiqaa A, Al-Amiery Ahmed A, San Ng Hooi, Musa Ahmed Y

机构信息

Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.

Environmental Research Center, University of Technology, Baghdad 10066, Iraq.

出版信息

Materials (Basel). 2014 Jun 5;7(6):4335-4348. doi: 10.3390/ma7064335.

DOI:10.3390/ma7064335

PMID:28788680

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5455929/

Abstract

A new coumarin derivative, ,'-((2E,2'E)-2,2'-(1,4-phenylenebis (methanylylidene))bis(hydrazinecarbonothioyl))bis(2-oxo-2H-chromene-3-carboxamide) PMBH, was synthesized and its chemical structure was elucidated and confirmed using spectroscopic techniques (Infrared spectroscopy IR, Proton nuclear magnetic resonance, H-NMR and carbon-13 nuclear magnetic resonance C-NMR). The corrosion inhibition effect of PMBH on mild steel in 1.0 M HCl was investigated using corrosion potential (), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and electrochemical frequency modulation (EFM) measurements. The obtained results indicated that PMBH has promising inhibitive effects on the corrosion of mild steel in 1.0 M HCl across all of the conditions examined. Scanning electron microscopy (SEM) was used to investigate the morphology of the mild steel before and after immersion in 1.0 M HCl solution containing 0.5 mM of PMBH. Surface analysis revealed improvement of corrosion resistance in presence of PMBH.

摘要

合成了一种新的香豆素衍生物，即,'-((2E,2'E)-2,2'-(1,4-亚苯基双(亚甲基))双(肼基甲酰硫基))双(2-氧代-2H-色烯-3-甲酰胺)PMBH，并使用光谱技术(红外光谱IR、质子核磁共振、H-NMR和碳-13核磁共振C-NMR)对其化学结构进行了阐明和确认。使用腐蚀电位()、动电位极化、电化学阻抗谱(EIS)和电化学频率调制(EFM)测量研究了PMBH在1.0 M HCl中对低碳钢的缓蚀作用。所得结果表明，在所有测试条件下，PMBH对1.0 M HCl中低碳钢的腐蚀具有良好的抑制作用。使用扫描电子显微镜(SEM)研究了低碳钢在含有0.5 mM PMBH的1.0 M HCl溶液中浸泡前后的形态。表面分析表明，在PMBH存在下耐腐蚀性有所提高。