镁锂合金表面含聚苯胺复合涂层的防腐性能研究  

ANTI-CORROSION PROPERTIES OF POLYANILINE CONTAINING COATINGS ON Mg-Li ALLOY

作　　者：陈兴娟[1] 沈科金[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,哈尔滨150001

出　　处：《腐蚀科学与防护技术》2009年第4期384-387,共4页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(50603003)

摘　　要：以过硫酸铵为氧化剂,磺基水杨酸为掺杂剂,用化学氧化法合成了聚苯胺-二氧化硅(PANI-SiO2)复合材料;通过FTIR,XRD和SEM对PANI-SiO2复合材料进行表征;以PANI-SiO2粉末为功能成分,环氧树脂为成膜物质,在镁锂合金表面制备了PANI-SiO2/环氧树脂复合涂层,用开路电位和交流阻抗谱研究了涂层的防腐蚀性能.结果表明,在3.0 mass%的NaC1溶液中,PANI-SiO2/环氧树脂复合涂层具有很好的防腐性能,且认为PANI的存在使得镁锂合金表面生成一层钝化膜.Polyaniline-SiO2 composites（ PANI-SiO2 ）were prepared by means of chemical oxidation ot aniline with ammonium persulphate in sulfosalicylic acid medium. The PANI-SiO2 was characterized by FTIR,XRD and SEM methods. A coating consisted of PANI-SiO2 and epoxy resin（EP） was prepared on Mg- Li alloy, and its anti-corrosion properties were investigated by open circuit potential and electrochemical impedance spectroscopy. The results indicated that the PANI-SiO2 containing coating showed good anti- corrosion property in 3.0 mass% NaCl solution. The excellent performance of PANI-SiO2 containing coating is attributed to the passivation of Mg-Li alloy by polyaniline.

关 键 词：聚苯胺 聚苯胺-二氧化硅 镁锂合金 防腐蚀性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]