镁合金表面碳纳米管/硅烷复合膜的耐蚀性能  

Corrosion resistance of carbon nanotubes/silane composite coatings on AZ91D magnesium alloy

作　　者：吴海江[1] 杨飞英[1] 彭成章[2] 郭文敏[1] 王小明[1] 

机构地区：[1]邵阳学院机械与能源工程系,湖南邵阳422000 [2]湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201

出　　处：《邵阳学院学报（自然科学版）》2016年第3期69-75,共7页Journal of Shaoyang University：Natural Science Edition

基　　金：湖南省自然科学基金资助项目(2015JJ2064);湖南省教育厅青年项目(15B213);邵阳市科技计划项目(2015JH36)

摘　　要：为了进一步改善AZ91D镁合金表面单一硅烷膜的耐蚀性能,将不同含量碳纳米管添加到γ-氨丙基三乙氧基硅烷(KH-550)溶液中,借助简单浸渍法在其表面制备了碳纳米管/硅烷复合膜。通过点滴试验、中性盐雾试验、全浸腐蚀试验和E-t曲线测试评价了复合膜的耐蚀性能。结果表明:与单一硅烷膜相比,碳纳米管/硅烷复合膜的致密性较高,有效地阻挡了侵蚀性介质向基体的渗透,显著提高了AZ91D镁合金的耐蚀能力;随着碳纳米管含量的增加,碳纳米管/硅烷复合膜的耐蚀性能先上升后下降,当碳纳米管含量为0.3 g/L时复合膜的耐蚀性能最佳。In order to further improve the corrosion resistance of the single silane coating on AZ91 D magnesium alloy,which was treated in γ- APS solution with different concentrations of the carbon nanotubes,the carbon nanotubes/silane composite coatings were prepared. The corrosion resistance of the composite coatings were evaluated by drop test,neutral salt spray test,immersion corrosion test and potential-time curve test.The results revealed that the compactness of the carbon nanotubes/silane coatings were higher than the single silane coating,which significantly improved the corrosion resistance of AZ91 D magnesium alloy by effectively blocking the infiltration of corrosive medium to the substrate.With the increase of the concentrations of the carbon nanotubes,the corrosion resistance of the carbon nanotubes/silane composite coatings first increased and then decreased.The carbon nanotubes/silane composite coatings had the optimum corrosion resistance when the concentration of the carbon nanotubes was 0.3g/L.

关 键 词：AZ91D镁合金 γ-氨丙基三乙氧基硅烷膜 碳纳米管 耐蚀性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]