两种成膜促进剂对Mg-Gd-Y-Zr镁合金表面铈盐转化膜耐蚀性能的影响
Effect of Two Kinds of Accelerants on Corrosion Resistance of Cerium-based Conversion Film on Mg-Gd-Y-Zr Mg
摘 要
为了替代Cr6+化学转化膜处理工艺,在Mg-Gd-Y-Zr镁合金表面分别用苯甲酸钠和碳酸钠这两种成膜促进剂在CeCl3溶液中制备铈盐转化膜,通过正交试验方法获得了成膜的最佳工艺条件.利用扫描电镜分析手段对转化膜的微观形貌进行了分析 ,探讨了铈盐转化膜成膜机制.得到的铈盐化学转化膜具有优良的耐蚀性能.
铈盐转化膜
成膜促进剂
magnesium alloy
cerium-based conversion coating
accelerant
Abstract
An orthogonal experiment was designed to optimize the Ce-based process in CeCl3 solution with two kinds of accelerants of sodium benzoate and sodium carbonate to replace the Cr6+ conversion process on Mg-Gd-Y-Zr magnesium alloy.The morphology and formation mechanism of the conversion film were studied by SEM and electrochemical experiment.the optimal process was 30 ℃,40 min,CeCl3 0.005 mol/L with the sodium benzoate as accelerant,and the temperature should be 10 ℃ when the accelerant was sodium carbonate.The obtained coating has good corrosion resistance.
中图分类号 TG178
所属栏目 应用技术
基金项目
收稿日期 2008/11/2
修改稿日期 2009/4/3
网络出版日期
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联系人作者古锐(rui_gu@sina.com)
备注古锐,硕士研究生.
引用该论文: GU Rui,ZHANG Xin-ming,CHEN Ming-an,YI Jian-long. Effect of Two Kinds of Accelerants on Corrosion Resistance of Cerium-based Conversion Film on Mg-Gd-Y-Zr Mg[J]. Corrosion & Protection, 2009, 30(11): 839～842
被引情况:
【1】蒋晓军,陈昌国,刘渝萍,尹玲,张丁非, "稀土强化镁合金耐蚀性能的研究进展",腐蚀与防护 33, 46-50(2012)
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参考文献
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【2】Wang C,Jiang F,Wang F.The characterization and corrosion resistance of cerium chemical conversion coatings for 304 stainless steel[J].Corrosion Science,2004,46(1):75-89.
【3】Rudd A L,Breslin C B,Mansfeld F.The corrosion protection afforded by rare earth conversion coatings applied to magnesium[J].Corrosion Science,2000,42(2):275-288.
【4】Katya Brunelli,Manuele Dabala,Irene Calliari,et al.Effect of HCl pre-treatment on corrosion resistance of cerium-based conversion coatings on magnesium and magnesium alloys[J].Corrosion Science 2005,47:989-1000.
【5】许越,陈 湘,吕祖舜,等.AZ91镁合金表面稀土转化膜的制备及耐蚀性能研究[J].中国稀土学报,2005,23(1):40-43.
【6】李凌杰,雷惊雷,于生海,等.镁合金铈转化膜的形成及表征[J].中国稀土学报,2007,25(6):736-739.
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