| 草酸钠对镀锌层三价铬蓝白钝化的影响 |
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| 引用本文： | 高志强,卫英慧.草酸钠对镀锌层三价铬蓝白钝化的影响[J].电镀与涂饰,2012,31(3):23-26. |
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| 作者姓名： | 高志强 卫英慧 |
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| 作者单位： | 太原理工大学,山西太原,030024 |
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| 摘 要： | 研究了不同浓度的草酸钠对镀锌层三价铬蓝白钝化膜的外观,电化学阻抗,耐乙酸铅点滴与中性盐雾腐蚀性能,以及钝化液使用寿命的影响。研究发现,以CrCl3.6H2O为主要成膜物,当CrCl3.6H2O和草酸钠的质量浓度分别为110 g/L与89.0 g/L时,可获得外观均匀光亮的蓝白色钝化膜,钝化膜在5%(质量分数)NaCl溶液中的低频阻抗值最大,耐乙酸铅点滴时间和耐中性盐雾腐蚀时间最长,钝化液的使用寿命也最长。
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| 关 键 词： | 镀锌层 蓝白钝化 三价铬 草酸钠 耐蚀性 |
Influence of sodium oxalate on trivalent chromium bright blue passivation of zinc-plated coating |
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| GAO Zhi-qiang
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WEI Ying-hui.Influence of sodium oxalate on trivalent chromium bright blue passivation of zinc-plated coating[J].Electroplating & Finishing,2012,31(3):23-26. |
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| Authors: | GAO Zhi-qiang WEI Ying-hui |
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| Affiliation: | Taiyuan University of Technology,Taiyuan 030024,China |
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| Abstract: | The influence of sodium oxalate with different concentrations on the appearance,electrochemical impedance,lead acetate dropping corrosion resistance,and neutral salt spray corrosion resistance of trivalent chromium bright blue passivation film on zinc-plated coating as well as the service life of passivation solution was studied.The passivation film obtained from a bath containing 110 g/L CrCl3.6H2O as main film-forming material and 89.0 g/L sodium oxalate is uniform,bright,and blue,has the highest low frequency impedance in 5wt% NaCl solution,and lasts the longest time in lead acetate dropping corrosion test and neutral salt spray test.The said passivation bath has the longest service life. |
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| Keywords: | zinc-plated coating bright blue passivation trivalent chromium sodium oxalate corrosion resistance |
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