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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Corrosion Behaviour of Carbon Steel in Acidic Media in Presence of Mn2O3 Nanoparticles Synthesized at Different pH
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Electrochemical Corrosion Behaviour of Carbon Steel in Acidic Media in Presence of Mn2O3 Nanoparticles Synthesized at Different pH

机译：不同pH条件下合成的Mn 2 O 3 纳米粒子在酸性介质中碳钢的电化学腐蚀行为

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摘要

The effect of Mn2O3 nanoparticles synthesized at different pH by co-precipitation method on theelectrochemical corrosion behaviour of carbon steel in 0.5 M hydrochloric acid was inspected bypotentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Thecorrosion behaviour of carbon steel in 0.5 M HCl, 0.5 M H3PO4 and 0.5 M H2SO4 was also examined inpresence of 20 ppm Mn2O3 nanoparticles. Mn?O? nanoparticles prepared at pH 10 to 13 werecharacterized by X-ray diffraction, XRD, transmission electron microscopy, TEM, and Fouriertransform infrared analyses, FTIR. Electrochemical impedance spectroscopy measurements showedthat the dissolution process takes place under activation control. Potentiodynamic polarization curvesshowed that Mn2O3 nanoparticles slightly enhance the corrosion resistance of carbon steel in acidicsolutions. The efficiency was found to increase with decreasing pH at which Mn2O3 nanoparticles weresynthesized. Mn2O3 nanoparticles synthesized at pH 10 has a better effect in 0.5 M HCl than in 0.5 MH2SO4 or 0.5 M H3PO4.
机译：通过电势极化和电化学阻抗谱技术研究了共沉淀法在不同pH条件下合成的Mn2O3纳米粒子对0.5M盐酸中碳钢电化学腐蚀行为的影响。还检查了碳钢在0.5 M HCl，0.5 M H3PO4和0.5 M H2SO4中的腐蚀行为，该条件不存在20 ppm Mn2O3纳米颗粒。锰？通过X射线衍射，XRD，透射电子显微镜，TEM和傅里叶变换红外分析FTIR表征了在10至13的pH下制备的纳米颗粒。电化学阻抗谱测量表明溶解过程是在活化控制下发生的。电位动力学极化曲线表明，Mn2O3纳米颗粒在酸性溶液中能稍微提高碳钢的耐腐蚀性。发现效率随着合成Mn2O3纳米颗粒的pH降低而增加。在0.5 M HCl中，pH 0.5合成的Mn2O3纳米颗粒比在0.5 MH2SO4或0.5 M H3PO4中具有更好的效果。

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