为了改善硅烷膜的耐蚀性,将硅烷化热镀锌钢板用硅酸钠溶液封闭后处理,获得了硅烷/硅酸盐复合膜.采用中性盐雾试验(NSS)、湿热试验、盐水全浸试验和电化学交流阻抗谱(EIS)评价了膜层的耐蚀性能.结果表明,与单一硅烷膜相比,复合膜的耐蚀性能明显提高,超过了常规铬酸盐钝化膜.尤其是在5%NaCl溶液中,复合膜的低频阻抗数值随浸泡时间的增加先增大后减小,表明其具有一定的"自修复"能力.
To improve the corrosion resistance of silane films further, the silane/silicate composite films were prepared by immersion hot-dip galvanized (HDG) steel samples in silane solution firstly and then in sodium silicate solution. The corrosion resistance of the composite films were investigated by neutral salt spray (NSS)test, humid thermic test, salt water test and electrochemical impedance spectroscopy (EIS). The results revealed that the corrosion resistance of the composite films was significantly enhanced, which was superior to the single silane film, even better than some chromate passivation film. Furthermore, the low frequency inductive loop in EIS was disappeared and the low frequency impedance values for the composite films in 5% NaCl solution were firstly increased then decreased with the increasing of the immersion time, which demonstrated the self-healing activity of the composite films.
参考文献
| [1] | 高丽丽,张春红,张密林,黄晓梅,江溪,王兴璞.镁锂合金无铬植酸化学转化膜研究[J].功能材料,2008(07):1134-1137. |
| [2] | 闫斌,陈宏霞,陈嘉宾,马学虎,于庆杰,彭乔.不锈钢表面功能性硅氧烷膜的制备与性能研究[J].功能材料,2008(10):1665-1668. |
| [3] | Trabelsi W;Dhouibi L;Triki E;Ferreira MGS;Montemor MF .An electrochemical and analytical assessment on the early corrosion behaviour of galvanised steel pretreated with aminosilanes[J].Surface & Coatings Technology,2005(2/3):284-290. |
| [4] | Danqing Zhu;Wim J. van Ooij .Enhanced corrosion resistance of AA 2024-T3 and hot-dip galvanized steel using a mixture of bis-[triethoxysilylpropyl]tetrasulfide and bis-[trimethoxysilylpropyl]amine[J].Electrochimica Acta,2004(7):1113-1125. |
| [5] | Zand, BN;Mahdavian, M .Corrosion and adhesion study of polyurethane coating on silane pretreated aluminum[J].Surface & Coatings Technology,2009(12):1677-1681. |
| [6] | Zucchi F;Frignani A;Grassi V et al.[J].Materials Chemistry and Physics,2008,110(2/3):263-268. |
| [7] | 单凤君,刘常升,王双红,齐国超,刘栋.热镀铝锌层铈掺杂硅烷钝化膜的性能[J].材料研究学报,2008(02):197-200. |
| [8] | Aramaki K .[J].Corrosion Science,2001,43(03):591-604. |
| [9] | Hamdy AS .Corrosion protection of aluminum composites by silicate/cerate conversion coating[J].Surface & Coatings Technology,2006(12/13):3786-3792. |
| [10] | Hamdy AS;Butt DP .Environmentally compliant silica conversion coatings prepared by sol-gel method for aluminum alloys[J].Surface & Coatings Technology,2006(1/2):401-407. |
| [11] | Lin BL;Lu JT;Kong G .Synergistic corrosion protection for galvanized steel by phosphating and sodium silicate post-sealing[J].Surface & Coatings Technology,2008(9):1831-1838. |
| [12] | K. Bonnel;C. Le Pen;N. Pebere .E.I.S. characterization of protective coatings on aluminium alloys[J].Electrochimica Acta,1999(24):4259-4267. |
| [13] | Aramaki K .[J].Corrosion Science,2002,44(07):1621-1632. |
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