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The Corrosion Inhibition Effect of Pyrrole Derivatives on Carbon Steel in 1.0 M HCl

机译:吡咯衍生物在1.0 M HCl中对碳钢的缓蚀作用

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The inhibition effect of new pyrrole derivatives , namely, 13-((4-aminophenyl)sulfonyl)-10,11- dihydro-9H-9,10-[3,4]epipyrrolo anthracene-12,14(13H,15H)-dione (1), anthracen-9(10H)- ylidenehydrazine(2),(11S,15R)-13-(anthracen-9(10)-ylideneamino)10,11-dihydro-9H-9,10 [3,4]epipyrroloanthracene-12,14-(13H,15H)-dione (3) , 1,6-bis-(N -hexachloro-5-norbornene-2,3- dicarboximidyl) hexane (4) and N-Phenylsulfonyloxy-hexachloro-5-norbornene-2,3-dicarboximide (5), against the corrosion of carbon steel in 1.0 M HCl solution has been systematically studied by electrochemical measurements (potentiodynamic polarization measurements –impedance spectroscopy-electrochemical frequency modulation). The results of Potentiodynamic polarization indicate that all pyrrole derivatives are Mixed type inhibitors . Among the studied compounds, exhibited the best inhibition activity of 82.8% at 21x10-6M from compound (1). The chemical structure of the synthesized compounds was established by proton and carbon thirteen nuclear magnetic resonance (1H-NMR),(13C-NMR), Fourier transform infrared (FTIR)and mass spectroscopy.Solution analysis (UV–visible spectrophotometric method- Fourier transform infrared [FTIR]) support the above inferences.
机译:新吡咯衍生物13-(((4-氨基苯基)磺酰基)-10,11-二氢-9H-9,10- [3,4]表吡咯并蒽-12,14(13H,15H)-的抑制作用二酮(1),蒽9(10H)-亚苄基肼(2),(11S,15R)-13-(蒽9(10)-亚烷基氨基)10,11-dihydro-9H-9,10 [3,4 ] epipyrrolooloanthracene-12,14-(13H,15H)-dione(3),1,6-双-(N -hexachloro-5-norbornene-2,3-dicarboximidyl)己烷(4)和N-苯基磺酰氧基-六氯-通过电化学测量(电位动力学极化测量–阻抗谱-电化学频率调制)已系统地研究了5-降冰片烯2,3-二甲叉酰亚胺(5)对碳钢在1.0 M HCl溶液中的腐蚀。电位动力学极化结果表明,所有吡咯衍生物均为混合型抑制剂。在研究的化合物中,对化合物(1)的21x10-6M表现出最佳的抑制活性,为82.8%。通过质子和碳十三核磁共振(1H-NMR),(13C-NMR),傅立叶变换红外光谱(FTIR)和质谱确定了合成化合物的化学结构。溶液分析(紫外可见分光光度法-傅立叶变换)红外(FTIR))支持上述推论。

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