通过单因素试验讨论了镁合金微弧氧化电解液各组分对成膜的作用,得到电解液最佳配方:10 g/L(NaPO3)6,5 g/L NH4F,6 g/L KOH,6mL/L C3H8O3.用扫描电镜(SEM)、X射线衍射(XRD)和能谱(EDS)分析了陶瓷膜层的表面形貌,截面形貌、相组成及元素组成;采用点滴试验、交流阻抗和盐雾试验考察了陶瓷层的耐腐蚀性能.结果表明:膜层表面分布着大量均匀的放电微孔,孔径在1～3 μm之间,膜层截面内层与基体过渡部分呈犬牙交错状态,结合良好;膜层由大量非晶态相及少量MgO组成,耐蚀性能优良.P与F元素的存在,证明了电解液组分较好地参与了微弧氧化反应.
参考文献
| [1] | 魏世丞,徐滨士,付东兴,陈永雄.军用装备镁合金表面防腐蚀技术研究[J].装甲兵工程学院学报,2006(06):79-83. |
| [2] | 姜兆华,李爽,姚忠平,孙学通.电解液对微弧氧化陶瓷膜结构与耐蚀性的影响[J].材料科学与工艺,2006(05):460-462. |
| [3] | Cai QZ;Wang LS;Wei BK;Liu QX .Electrochemical performance of microarc oxidation films formed on AZ91D magnesium alloy in silicate and phosphate electrolytes[J].Surface & Coatings Technology,2006(12/13):3727-3733. |
| [4] | Liang J;Guo BG;Tian J;Liu HW;Zhou JF;Liu WM;Xu T .Effects of NaAlO2 on structure and corrosion resistance of microarc oxidation coatings formed on AM60B magnesium alloy in phosphate-KOH electrolyte[J].Surface & Coatings Technology,2005(2/3):121-126. |
| [5] | Y. Ma;H. Hu;D. Northwood .Optimization of the electrolytic plasma oxidation processes for corrosion protection of magnesium alloy AM50 using the Taguchi method[J].Journal of Materials Processing Technology,2007(26):58-64. |
| [6] | WANG Y Q;ZHENG M Y;WU K .Microarc oxidation coating formed on SiCw/AZ91 magnesium matrix composite and its corrosion resistance[J].Materials Letters,2005,59(14-15):1727-1731. |
| [7] | 薛文斌.SiC颗粒增强体对铝基复合材料微弧氧化膜生长的影响[J].金属学报,2006(04):350-354. |
| [8] | Hongfei Guo;Maozhong An;Shen Xu .Microarc oxidation of corrosion resistant ceramic coating on a magnesium alloy[J].Materials Letters,2006(12):1538-1541. |
| [9] | 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. |
| [10] | 王燕华,王佳,张际标.电流密度对AZ91D镁合金微弧氧化膜性能的影响[J].中国腐蚀与防护学报,2005(06):332-335. |
| [11] | 潘复生.高性能变形镁合金及加工技术[M].北京:科学出版社,2007:278-279. |
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%