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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Corrosion protection of carbon steels by electrochemically synthesized V-TiO2/polypyrrole composite coatings in 0.1 M HCl solution
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Corrosion protection of carbon steels by electrochemically synthesized V-TiO2/polypyrrole composite coatings in 0.1 M HCl solution

机译：通过电化学合成的V-TiO2 /聚吡咯复合涂层在0.1M HCl溶液中腐蚀保护碳钢

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摘要

Polypyrrole (PPy) composite coatings have been effectively synthesized in the presence of TiO2 and V-TiO2 nanoparticles on carbon steel by electrochemical method in aqueous oxalic acid solutions. These coatings were characterized by different surface analysis methods. TEM results confirmed that the size of V-TiO2 nanoparticles (11.91 +/- 1.03 nm) was smaller than that of TiO2 nanoparticles (17.22 +/- 2.84 nm), therefore increasing the interaction between PPy composite coatings and metal surface. The electrical conductivity measurement was carried out to examine the electrical properties of TiO2/PPy and V-TiO2/PPy composite coatings. Besides, the electrochemical behaviors of these coatings were also studied in 0.1 M HCl solution by electrochemical impedance spectroscopy and potentiodynamic polarization measurements. Results showed that the V-TiO2/PPy composite coatings exhibited better anti-corrosion performance than TiO2/PPy composite coatings. The exceptional anti-corrosion performance of PPy composite coatings was associated with the synergistic effect of the increase in physical barrier, prevention of charge transport by TiO2 nanoparticles and the complex passive film on the metal surface. (C) 2018 Elsevier B.V. All rights reserved.
机译：通过在草酸溶液中通过电化学方法在TiO 2和V-TiO2纳米颗粒存在下，在碳钢的存在下有效地合成聚吡咯（PPY）复合涂层。这些涂层的特征在于不同的表面分析方法。 TEM结果证实V-TiO2纳米颗粒（11.91 +/- 1.03nm）的尺寸小于TiO2纳米颗粒（17.22 +/- 2.84nm），因此增加了PPY复合涂层和金属表面之间的相互作用。进行电导率测量以检查TiO2 / PPY和V-TiO2 / PPY复合涂层的电性能。此外，通过电化学阻抗光谱和电位极化偏振测量，还在0.1M HCl溶液中研究了这些涂层的电化学行为。结果表明，V-TiO2 / PPY复合涂层比TiO 2 / PPY复合涂料表现出更好的防腐蚀性。 PPY复合涂层的特殊抗腐蚀性能与物理屏障增加的协同效应，通过TiO2纳米颗粒预防电荷传输和金属表面上的复杂无源膜。 （c）2018年elestvier b.v.保留所有权利。

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