十二烷基苯磺酸二次掺杂聚苯胺/环氧有机硅复合涂层的防腐性能∗

摘要

以自制的十二烷基苯磺酸二次掺杂聚苯胺为防腐颜料,制备质量分数为0．5％,1．0％及1．5％的十二烷基苯磺酸二次掺杂聚苯胺/环氧有机硅复合涂层,利用扫描电子显微镜观察不同掺量十二烷基苯磺酸二次掺杂聚苯胺在环氧有机硅涂层中的分散状态,并通过开路电位、电化学阻抗谱及Tafel曲线对比分析涂层的耐腐蚀性能.结果表明,十二烷基苯磺酸二次掺杂聚苯胺添加量为1．0％时,其在环氧有机硅涂层的分散均匀且致密,并在3．5％(质量分数)NaCl溶液中浸泡后对 Q235低碳钢表现出良好的防腐效果.%The epoxy-silicone composite coatings was prepared by the anti-corrosion pigment of dodecylbenzene sulfonate acid redoping polyaniline,mass fraction of it was 0.5%,1.0%,1.5%.SEM tests were carried out to observe dispersed state of different quantity of dodecylbenzene sulfonate acid redoping polyaniline in the epoxy-silicone composite coatings,and their anti-corrosion properties were studied by means of open circuit potential, electrochemical impedance spectroscopy and Tafel curves.The results indicated that the coatings with 1 .0% do-decylbenzene sulfonate acid redoping polyaniline were uniformly dispersed and density,which had the best anti-corrosion performance on Q235 mild steel in NaCl (3.5wt%)solution.