化工进展

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聚吡咯的绿色制备及其环氧树脂复合涂层对Q235钢的防腐性能

路 亮1,2,侯文鹏2,关士友1,葛子义2   

  1. 1华东理工大学材料科学与工程学院,上海 200237;2中科院宁波材料技术与工程研究所,浙江 宁波 315201
  • 出版日期:2013-03-05 发布日期:2013-03-05

Green route to prepare polypyrrole and the anticorrosion property of polypyrrole–epoxy composite coating on Q235 steel

LU Liang1,2,HOU Wenpeng2,GUAN Shiyou1,GE Ziyi2   

  1. 1 School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China; 2Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Zhejiang,China
  • Online:2013-03-05 Published:2013-03-05

摘要: 采用一种绿色、温和的氧化体系(H2O/FeCl2/H2O2)合成了结构规整的聚吡咯纳米微球,其结构和形貌采用FTIR和SEM进行表征。以聚吡咯为功能成分,环氧树脂为成膜物质,制备了聚吡咯/环氧树脂复合涂层,研究了其复合涂层在3.0% NaCl溶液中的防腐性能(EIS曲线、开路电位、Tafel极化曲线),结果表明0.6% Ppy-H复合涂层在3.0% NaCl溶液中浸没60天后,仍表现出高的涂层电阻(5.14×107 Ω?cm2)和腐蚀电位 (Vcorr = ?0.202 mV)。

关键词: 聚吡咯, 复合涂层, 防腐蚀, Q235钢

Abstract: Polypyrrole nanoparticle was synthesized by chemical oxidative polymerization of pyrrole using H2O/FeCl2/H2O2 as a green,mild oxidizing system. The structure and morphology of the polypyrrole was characterized by IR spectra and SEM. The polypyrrole-epoxy composite coating was then prepared with epoxy resin as the matrix. The corrosion protection property of polypyrrole-epoxy composite coating on Q235 steel was investigated by electrochemical impedance spectroscopy (EIS) technique,OCP and tafel polarization curve in 3.0% NaCl aqueous solution. The results indicated that the 0.6% Ppy-H-containing coatings could offer high protection with the impedance values and corrosion potential remained at 5.14×107 Ω?cm2 and ?0.202 mV after 60 days immersed in 3.0% NaCl aqueous solution.

Key words: polypyrrole, composite coating, anticorrosion, Q235 steel

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