AZ31B型镁合金表面钛盐化学转化膜
Titanium-salt Conversion Coating on AZ31B Magnesium Alloy
摘 要
研究了一种镁合金表面无铬钝化的钛盐环保型化学转化膜处理工艺。利用中性盐雾试验和极化曲线法测试了转化膜的耐蚀性能, 采用SEM、EDS等方法对膜的形貌、元素组成进行了研究。结果表明, 钛盐转化处理后在镁合金表面形成含钛氧化物膜层, 该膜层有良好的耐蚀性能。
化学转化膜
镁合金
环境友好
titanium salt
chemical conversion coatings
magnesium alloy
environmental friendly
Abstract
An environmental friendly chemical conversion coating treatment process, in which AZ31B magnesium alloy was passivated with tiatnium salt rather than chromate, was studied. The anti-corrosion ability of the conversion coating was evaluated by salt spray and polarization curve tests. The surface morphology, element constituents of the conversion coating were studied through SEM and EDS. The results showed that a titanium-containing oxide conversion coating was formed after treated by titanium-salt solution and the coating provided good corrosion protection to AZ31B magnesium alloy.
中图分类号 TG178 TG146.2
所属栏目 试验研究
基金项目 国家自然科学基金项目(20976143); 陕西省教育厅专项科研计划(08JK324)
收稿日期 2010/12/7
修改稿日期 2011/1/20
网络出版日期
作者单位点击查看
备注郭瑞光, 教授, 博士,
引用该论文: LAN Li-qiang,GUO Rui-guang. Titanium-salt Conversion Coating on AZ31B Magnesium Alloy[J]. Corrosion & Protection, 2011, 32(9): 687
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参考文献
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【2】曾爱平, 薛颖, 钱宇峰, 等. 镁合金的化学表面处理[J]. 腐蚀与防护, 2000, 21(2): 55-56.
【3】Li Q, Xu S Q, Hu J Y, et al. The effects to the structure and electrochemical behavior of zinc phosphateconversion coatings with ethanolamine on magnesium alloy AZ91D[J]. Electrochemical Acta, 2010, 55(3):887-894.
【4】Kwo Zong Chong, Teng Shin Shin. Conversion-coating treatment for magnesium alloy by a permanganate-phosphate solution[J]. Materials Chemistry and Physics, 2003, 80(1):191-200.
【5】吴丹, 杨湘杰. 镁合金锡酸盐化学转化膜生长过程研究[J]. 特种铸造及有色合金, 2008, 28(11): 885-888.
【6】Lin C S, Lin H C, Lin K M, et al. Formation and properties of stannate conversion coatings on AZ61 magnesium alloys[J]. Corrosion science, 2006, 48(1): 93-109.
【7】Montemor M F, Simoes A M, Carmezim M J. Characterization of rare-earth conversion films formed on the AZ31 magnesium alloy and its relation with corrosion protection[J]. Applied Surface Science, 2007, 253(16): 6922-6931.
【8】Liu J R, Guo Y N, Huang W D. Study on the corrosion resistance of phytic acid conversion coating for magnesium alloys[J]. Surface＆coating Technology, 2006, 201(3): 1536-1541.
【9】危冬发, 李天铎, 许静李, 等. 钛(Ⅳ)溶液稳定性研究[J]. 中国皮革, 2005, 34(7): 52-57.
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