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首页> 外文期刊>RSC Advances >Synthesis, characterization and electrochemical analysis of cysteine modified polymers for corrosion inhibition of mild steel in aqueous 1 M HCl
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Synthesis, characterization and electrochemical analysis of cysteine modified polymers for corrosion inhibition of mild steel in aqueous 1 M HCl

机译：半胱氨酸改性聚合物的合成，表征及电化学分析，用于含有1M HCl水溶液中低碳钢的腐蚀抑制作用

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Butler's cyclopolymerization protocol was used to synthesize homo and copolymers of cysteine residues and diallyldimethylammonium chloride (DADMAC) using water as a solvent and excellent yields were obtained. The structural composition of the polymers was determined using nuclear magnetic resonance (NMR) and Fourier-transform infrared (FT-IR) spectroscopies. The thermal stability of the synthesized polymers was determined using thermogravimetric analysis (TGA). The corrosion efficiencies and adsorption characteristics of these polymers on mild steel were evaluated using gravimetric weight loss and potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). The copolymers of cysteine residues and DADMAC exhibited excellent inhibition efficiencies in arresting mild steel corrosion in 1 M hydrochloric acid (HCl) at 60 degrees C. The best fitted Langmuir, Temkin and Freundlich adsorption isotherms suggested that the adsorption process occurs through chemisorption and physisorption. The surface morphology of mild steel in the presence or absence of polymers was determined using atomic force microscopy (AFM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). This systematic study might provide a way to design new inhibitor compounds that could be beneficial in the field of biomedical science as well as for anti-corrosion applications.
机译：巴特勒的环聚合方案用于合成均匀和半胱氨酸残基的共聚物和使用水作为溶剂的二烯丙基甲基氯化铵（DADMAC），得到优异的产率。使用核磁共振（NMR）和傅里叶变换红外（FT-IR）光谱测定聚合物的结构组合物。使用热重分析（TGA）测定合成聚合物的热稳定性。使用重量损失和电位溶液和电化学阻抗光谱（EIS）评价这些聚合物对低碳钢的腐蚀效率和吸附特性。半胱氨酸残基和DADMAC的共聚物表现出60℃盐酸（HCl）中的温和钢腐蚀的优异抑制效率。最佳合适的Langmuir，Temkin和Freundlich吸附等温线表明吸附过程通过化学吸附和理解进行。使用原子力显微镜（AFM），扫描电子显微镜（SEM）和能量分散X射线光谱（EDX）和能量分散X射线光谱（EDX）和X射线光电子谱（XPS）测定聚合物存在或不存在聚合物的表面形态。这种系统的研究可以提供一种设计新的抑制剂化合物，这些化合物可能是生物医学科学领域以及防腐应用。

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  • 来源
    《RSC Advances》 |2019年第8期|共18页
  • 作者

    Mazumder Mohammad A. Jafar;

  • 作者单位

    King Fahd Univ Petr &

    Minerals Dept Chem Dhahran 31261 Saudi Arabia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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