| 热镀锌钢板钼酸盐—单宁酸钝化研究 |
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| 引用本文： | 于斐,刘光明,杨柳.热镀锌钢板钼酸盐—单宁酸钝化研究[J].南昌航空工业学院学报,2012(2):45-49. |
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| 作者姓名： | 于斐 刘光明 杨柳 |
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| 作者单位： | 南昌航空大学 |
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| 基金项目： | 国家自然科学基金(51161022) |
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| 摘 要： | 采用钼酸盐—单宁酸复合钝化工艺对热镀锌钢板进行了钝化处理。硫酸铜点滴实验表明,采用钼酸盐—单宁酸复合钝化的镀锌钢板的耐蚀性与单一钼酸盐钝化的耐蚀性相当。测试了镀锌钢板在0.5mol/L的NaCl溶液中钝化前后的极化曲线、电化学交流阻抗谱。结果表明:经钼酸盐、单宁酸、钼酸盐—单宁酸钝化的样品腐蚀电流密度分别为4.95×10-5、9.80×10-5和1.47×10-4A cm-2。电化学阻抗谱表明,单宁酸加入钼酸盐中,其钝化样品耐蚀性能有所下降。简要探讨了钼酸盐—单宁酸复合钝化机理。
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| 关 键 词： | 钼酸盐—单宁酸 钝化 镀锌钢板 腐蚀 |
Study of molybdate-tannic acid passivation on galvanised steel |
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| YU Fei,LIU Guang-ming,YANG Liu.Study of molybdate-tannic acid passivation on galvanised steel[J].Journal of Nanchang Institute of Aeronautical Technology(Natural Science Edition),2012(2):45-49. |
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| Authors: | YU Fei LIU Guang-ming YANG Liu |
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| Institution: | (Nanchang Hangkong University,Nanchang,Jiangxi 330063,China) |
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| Abstract: | A combined molybdate–tannic acid passivation treatment on galvanised steel is studied in this paper.Copper decoration drop tests indicated that the combined molybdate–tannic acid passivated samples showed better corrosion resistance than that of samples treated separately by molybdate or tannic acid.The electrochemical behaviours of the passivated samples were investigated using potentiodynamic polarisation and electrochemical impendence spectra in 0.5 mol L-1 NaCl solution and showed corrosion current densities of 4.95×10-5,9.80 ×10-5and 1.47 ×10-4A﹒cm-2 respectively.Electrochemical impendence spectra also indicated that molybdate–tannic passivated samples exhibited worse corrosion resistance than that of molybdate passivated samples.The mechanism of molybdate–tannic acid passivation on galvanised steel is discussed in brief. |
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| Keywords: | molybdate–tannic phytic acid passivation galvanised steel corrosion |
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