为了提高镁合金镧转化膜的耐腐蚀性能,通过容量法和电化学方法研究了预处理对镁合金AX91D镧转化膜在5%NaCl溶液中腐蚀行为的影响.利用扫描电子显微镜(SEM)和能量色散谱仪(EDS)研究了膜层表面形貌及其组成,通过电极电位的跟踪测试研究了镧转化膜的成膜过程.结果表明:预处理不改变镧转化成膜过程的基本规律,但有助于镧的氧化物沉积;提高了镁合金镧转化膜的耐腐蚀性能,浸泡30 h其耐腐蚀性能与传统的封闭的铬酸盐转化膜相当.
参考文献
| [1] | 焦树强,旷亚非,陈金华,周海晖.镁及其合金的腐蚀与阳极化处理[J].电镀与环保,2002(03):1-4. |
| [2] | Amy L. Rudd;Carmel B. Breslin;Florian Mansfeld .The corrosion protection afforded by rare earth conversion coatings applied to magnesium[J].Corrosion Science,2000(2):275-288. |
| [3] | 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,2007,253:6922. |
| [4] | Dabala M.;Brunelli K.;Napolitani E.;Magrini M. .Cerium-based chemical conversion coating on AZ63 magnesium alloy[J].Surface & Coatings Technology,2003(2/3):227-232. |
| [5] | 张永君,严川伟,王福会.Mg及Mg合金表面稀土转化处理及其耐蚀性研究[J].腐蚀科学与防护技术,2001(z1):467-470. |
| [6] | 许越,陈湘,吕祖舜,李英杰.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(01):40-43. |
| [7] | Yu Shengxue;Zhang Zhonwei;Chert Ling;Han Jing .Influence of solution composition formnation d golden yellow rarth conversion film on magnesium alloy[J].Journal of Rare Earths,2005,23(zk):255. |
| [8] | Yu Shengxue,Lü Qiaoyan,Han Jing,Zhang Zhanwei,Zhang Qianyun.Preparation and Performance of Rare Earths Chemical Conversion Film on Magnesium Alloy[J].稀土学报（英文版）,2006(z2):397-400. |
| [9] | R. F. Zheng;C. H. Liang .Conversion coating treatment for AZ91 magnesium alloys by a permanganate-REMS bath[J].Materials and Corrosion,2007(3):193-197. |
| [10] | 陈东初,吴桂香,李炜常,李文芳,梁奕清.AZ91D镁合金无铬铈盐转化膜的正交试验研究[J].轻合金加工技术,2007(06):43-47,56. |
| [11] | Brunelli K;Dabalá M;Calliari I;Magrini M .Effect of HCl pretreatment on corrosion resistance of cerium-based conversion coatings on magnesium and magnesium alloys[J].Corrosion Science,2005,47:989. |
| [12] | 郭敏,李荻.镁合金无铬化学转化工艺研究[J].材料保护,2005(05):28-30. |
| [13] | 钱建刚,李荻,郭宝兰.镁合金的化学转化膜[J].材料保护,2002(03):5-6. |
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