采用环保型阳极氧化工艺,在低压恒流条件下,在镁合金AZ31表面获得了质量良好的白色氧化膜层,用SEM,XRD和XPS等分析手段,研究氧化膜层的微观形貌、相组成和化学组成,并采用动电位扫描的电化学方法考察氧化膜的耐腐蚀性能.结果表明:不同电流密度时,都可在阳极表面观察到细小电火花.制得的阳极氧化膜的主要相组成是MgO,同时含有Al2O3,Na4(AlSiO4)3(OH)等;膜层具有多孔结构,孔径较为均匀,膜层与基体结合牢固;在质量分数为3.5%的NaCl溶液中,阳极氧化的镁合金耐腐蚀性优于没有经过阳极氧化试样的耐腐蚀性.
参考文献
| [1] | Inoue H;Sugahara K;Yananoto A et al.Corrosion rate of magnesium and its alloys in buffered chloride solutions[J].Corrosion Science,2002,44(03):603-610. |
| [2] | Haruto Fukuda a;Yasumichi Matsumoto .Effects of Na2SiO3 on anodization of MgAlZn alloy in 3 M KOH solution[J].Corrosion Science,2004,46(05):2135-2142. |
| [3] | 王维青,潘复生,左汝林.镁合金腐蚀及防护研究新进展[J].兵器材料科学与工程,2006(02):73-77. |
| [4] | Zozulin A J;Bartak D E .Anodized coatings for magnesium alloys[J].Metal Finishing,1994,92(03):39-43. |
| [5] | Fei Chen;Hai Zhou;Bin Yao;Zhen Qin;Qingfeng Zhang .Corrosion resistance property of the ceramic coating obtained through microarc oxidation on the AZ31 magnesium alloy surfaces[J].Surface & Coatings Technology,2007(9/11):4905-4908. |
| [6] | Yongjun Zhang;Chuanwei Yan;Fuhui Wang et al.Study on the environmentally friendly anodizing of AZ91D magnesium alloy[J].Surface and Coatings Technology,2002,161(01):37-44. |
| [7] | Houng-Yu Hsiao;Paul Chung;Wen-Ta Tsai .Baking treatment effect on materials characteristics and electrochemical behavior of anodic film formed on AZ91D magnesium alloy[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(2):781-793. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%