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首页> 外文期刊>Corrosion Engineering, Science and Technology >Influence of phosphate ion dopant on corrosion protection properties of polypyrrole coatings on carbon steel
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Influence of phosphate ion dopant on corrosion protection properties of polypyrrole coatings on carbon steel

机译：磷酸根离子掺杂对碳钢上聚吡咯涂层腐蚀防护性能的影响

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摘要

Polypyrrole (PPy) and polypyrrole-phosphate (PPyP) coatings were electropolymerised onto carbon steel electrodes in aqueous oxalic acid solution using the cyclic voltammetry technique. The electropolymerisation of PPyP was carried out with addition of trisodium phosphate to the supporting electrolyte. Prepared coatings were characterised using scanning electron microscopy. In addition, the ability of the coatings to control the corrosion of carbon steel was studied with the help of a variety of electrochemical methods: open circuit potential monitoring, potentiodynamic polarisation and electrochemical impedance spectroscopy all in 3·5% NaCl solution. All the results have consistently indicated that carbon steel is better protected by the PPyP coating than by the PPy coating.
机译：使用循环伏安法将聚吡咯（PPy）和聚吡咯磷酸盐（PPyP）涂层在草酸水溶液中电聚合到碳钢电极上。 PPyP的电聚合是在支持电解质中加入磷酸三钠进行的。使用扫描电子显微镜表征制备的涂层。另外，借助于多种电化学方法研究了涂层控制碳钢腐蚀的能力：开路电势监测，电位动力学极化和电化学阻抗谱均在3％5％NaCl溶液中进行。所有结果一致表明，PPyP涂层比PPy涂层能更好地保护碳钢。

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