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首页> 外文期刊>International Journal of Electrochemical Science >Chemical and Electrochemical Studies of para-Hydroazo-pyrazolone Derivatives as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solutions
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Chemical and Electrochemical Studies of para-Hydroazo-pyrazolone Derivatives as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solutions

机译：对-偶氮-吡唑啉酮衍生物在盐酸溶液中作为低碳钢腐蚀抑制剂的化学和电化学研究

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摘要

A comprehensive study on the inhibitory effect of some para-Hydroazopyrazolone (antipyrine)derivatives verse mild steel corrosion in 1 M HCl solution has been performed by chemicalmethod(WL), electrochemical techniques (Tafel polarization, electrochemical frequency modulation(EFM) and electrochemical impedance spectroscopy (EIS)) at 25C. The efficiency of inhibition rosewith addition of inhibitor and decreased with raising temperature. Data of Tafel polarization revealsthat these investigated compounds reduced both the anodic and cathodic reactions and thus behaved asmixed-type inhibitors. The ability of these molecules to adsorb on the surface of mild steel best fit withLangmuir adsorption isotherm. The thermodynamic activation parameters of mild steel corrosion in 1M HCl were determined and discussed. Scanning electron microscopy and energy dispersive X-ray(SEMandEDX) techniques were employed for surface examination of uninhibited and inhibited mildsteel. A good correlation was found between the experimental results and the theoretical data. The %inhibition efficiency (%IE) results from different experiments were in a reasonable agreement.
机译：通过化学方法（WL），电化学技术（Tafel极化，电化学频率调制（EFM）和电化学阻抗谱）对某些对-羟基吡唑啉酮（安替比林）衍生物对低碳钢在1 M HCl溶液中的抑制作用进行了综合研究（EIS））在25C。添加抑制剂后，抑制效率随温度的升高而降低。 Tafel极化的数据表明，这些研究的化合物既减少了阳极反应，也减少了阴极反应，因此表现为混合型抑制剂。这些分子吸附在低碳钢表面上的能力最符合Langmuir吸附等温线。确定并讨论了在1M HCl中低碳钢腐蚀的热力学激活参数。采用扫描电子显微镜和能量色散X射线（SEMandEDX）技术对未抑制和抑制的低碳钢进行表面检查。在实验结果和理论数据之间发现了很好的相关性。来自不同实验的％抑制效率（％IE）结果是合理的。

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