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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Impedance Spectroscopy Investigation of a Polyurethane Coating on Bridge 16Mnq Steel Surface
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Electrochemical Impedance Spectroscopy Investigation of a Polyurethane Coating on Bridge 16Mnq Steel Surface

机译：桥梁16Mnq钢表面聚氨酯涂层的电化学阻抗谱研究。

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摘要

The bridge 16Mnq steel sample was successfully coated with polyurethane film in order to enhance its corrosion resistance. The electrochemical properties of polyurethane film coated samples with different coating thicknesses (60, 80 and 100 μm) were investigated using electrochemical impedance spectroscopy (EIS). Corrosion tests were carried out by exposing the coated system to NaCl aqueous solution with the concentration of 3.0% in a horizontal flat-cell. The improvement of corrosion resistance of the coated substrate was evaluated by the time dependent impedance parameters. The degradation phenomenon demonstrated by EIS measurements was related with the changes of mechanical properties of coated metals which could be measured by tests of microhardness and pull- off adhesion. Polyurethane coating was affirmed to possess strong adhesion and enhanced anticorrosion protection characteristics.
机译：桥梁16Mnq钢样品成功地涂有聚氨酯膜，以增强其耐腐蚀性。使用电化学阻抗谱（EIS）研究了具有不同涂层厚度（60、80和100μm）的聚氨酯薄膜涂层样品的电化学性能。腐蚀试验是通过将涂覆的系统暴露于水平扁平电池中浓度为3.0％的NaCl水溶液中进行的。通过随时间变化的阻抗参数评估涂覆基材的耐腐蚀性的提高。 EIS测量表明的降解现象与涂层金属的机械性能变化有关，可以通过测试显微硬度和剥离粘合力来测量。确认聚氨酯涂料具有很强的附着力和增强的防腐性能。

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