用超声-电沉积方式制备Ni-Al2O3复合镀层,用扫描电子显微镜(SEM)观察镀层腐蚀前后的表面形貌,用2-射线衍射仪(XRD)分析镀层的相组成,用电化学方法测试镀层在中性及酸性腐蚀介质中的极化曲线(Tafel)及循环伏安曲线(CV),分析超声波对镀层耐蚀性的影响.结果表明,适当的超声波作用使Al2O3粒子均匀分散在复合镀层中,使镀层表面平整致密,降低孔隙率,并细化基质金属Ni的晶粒,提高镀层的耐蚀性;在3.5 mass%NaCl溶液中,超声-电沉积复合镀层耐均匀腐蚀及点腐蚀能力都优于单独电沉积复合镀层;在10 mass%H2SO4介质中,超声-电沉积复合镀层的维钝电流小,耐蚀性优于单独电沉积复合镀层.
参考文献
| [1] | 张立德.纳米材料和纳米结构[M].北京:科学出版社,2000:59. |
| [2] | Chang L M,An M Z,Guo H F,et al.Microstructure and properties of Ni-Co/nano-Al2O3 composite coatings by pulse reversal current electrodeposition[J].Appl.Surf.Sci.,2006,253(4):2132. |
| [3] | Hou F Y,Wang W,Guo H T.Effect of the dispersibility of ZrO2 nanoparticles in Ni-ZrO2 electroplated nanocomposire coatings on the mechanical properties of nanocomposite coatings[J].Appl.Surf.Sci.,2006,252(10):3812. |
| [4] | Shi L,Sun C F,Gao P,et al.Mechanical properties and wear and corrosion resistance of electrodeposited Ni-Co/SiC nanocomposite coating[J].Appl.Surf.Sci.,2006,252(10):3591. |
| [5] | Gyftou P,Stroumbouli M,Pavlatou E A,et al.Tribological study of Ni matrix composite coatings containing nano and micro SiC particles[J].Electrochim.Acta,2005,50(23):4544. |
| [6] | Huang Z J,Xiong D S.MoS2 coated with Al2O3 for Ni-MoSs/Al2O3 composite coatings by pulse electrodeposition[J].Surf.Coat.Technol.,2007,202(14):3208. |
| [7] | Xia F F,Wu M H,Wang F,et al.Nanocompceite Ni-TiN coatings prepared by ultrasonic electrodeposition[J].Curr.Appl.Phys.,2009,9(1):44. |
| [8] | 程敬泉,姚素薇.超声波在电化学中的应用[J].电镀与精饰,2005,27(1):16. |
| [9] | Touyeras F,Hihn J Y,Delalande S,et al.Ultrasound influence on the activation step before electroless coating[J].Ultrason.Sonochem.,2003,10(6):363. |
| [10] | Zheng H Y,An M Z.Electrodeposition of Zn-Ni-Al2O3 nanocomposite coatings under ultrasound conditions[J].J.Alloys Compd.,2007,459(1-2):548. |
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%