在磺基水杨酸(SSA)的酸体系中,以过硫酸铵为氧化剂,采用化学氧化聚合法,调整聚合单体配比,制备了SSA掺杂的苯胺/吡咯导电共聚物(PANI/PY-SSA),通过FT-IR,SEM和XRD等测试手段对其分子结构、微观结构和有序化程度进行了表征.同时,将该导电共聚物加入到环氧树脂涂料中,通过Tafel极化曲线和EIS阻抗谱研究了PANI/PY-SSA对低碳钢材料的防腐蚀性能.结果表明,PY共聚改性明显提高了聚苯胺对金属的保护能力,且当聚合单体配比n(AN)∶n(PY)=3∶7时,制备的PANI/PY-SSA防腐蚀性能最好,涂层的Ecorr为-0.335 V,Jcorr为7.972×10-8A/cm,Rc为2.103×105 Ω·cm2,CC为1.646×10-8F/cm2.
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