【摘要】 采用聚3,4-乙烯二氧噻吩:聚苯乙烯磺酸(PEDOT:PSS)对锌粉进行表面改性,在3.5%(质量分数)NaCl溶液中的浸泡试验和扫描电子显微镜分析结果显示改性后锌粉腐蚀减弱,扫描振动电极技术测试(SVET)结果显示腐蚀电流密度下降一个数量级,锌粉的耐蚀性得到提高。通过盐雾试验和电化学阻抗谱测试表征了锌粉改性对涂层防护性能的影响,发现改性后涂层表层锌粉消耗降低,腐蚀产物减少,且涂层的阴极保护作用时间延长20%。PEDOT:PSS提高了涂层表层中锌粉的耐蚀性和强化了涂层内部阴极保护作用。更多还原

【Abstract】 Zn particles were surface modified with polystyrene sodium sulfonate doped poly3, 4-ethylene dioxythiophene(PSS-PEDOT). The corrosion performance of the as modified Zn powder was investigated by means of immersion test in 3.5%NaCl(mass fraction) solution and scanning electron microscope, of which the corrosion current density was found one order of magnitude smaller than that of the blank Zn powder. Then, the anticorrosion performance of the coating composed of acrylic resin incorporated with the modified Zn powder was characterized by means of salt spray test and electrochemical impedance spectroscope. It follows that less corrosion of Zn particles on the coating surface was observed and the cathodic protection duration of the coating was prolonged by 20% in contrast with the one incorporated with blank Zn powder. The increased corrosion resistance of Zn particles and enhanced electrical connections that decreased the Zn reactivity was proposed as the possible mechanism of the improved anticorrosion performance of the coating incorporated with modified Zn powder.更多还原