采用SEM、EDXS、XPS及电化学测试方法对镁合金表面镀锌电沉积过程中的界面反应及镀层生长规律进行研究.结果表明,采用前处理方法后,镁合金表面膜的成分由Mg(OH)2/Mg(OH)HCO3转变为MgF2+Zn,有效地抑制了镁在电镀液中的腐蚀,促进了锌在电极表面的形核与生长,获得的锌镀层与基体结合力优良.采用计时电流法对锌镀层电结晶的研究发现:低过电位下电极表面经历了两次形核过程,镀层沉积物颗粒显得致密,而高过电位下电极表面只经历了一次形核过程,镀层沉积物颗粒变得松散.
参考文献
| [1] | 郭洪飞,安茂忠.镁及镁合金电镀与化学镀[J].电镀与环保,2004,24(2):1. |
| [2] | 刘正,张奎,曾小勤.镁基轻质合金理论基础及其应用[M].北京:机械工业出版社,2006. |
| [3] | Inoue H,Sugahara K,Yamamoto A.Corrosion rate of magnesium and its alloys in buffered chloride solutions[J].Corros.Sci.,2002,44(3):603. |
| [4] | Song G L,Andrej Atrens,Wu X L,et al.Corrosion behaviour of AZ21,AZ501 and AZ91 in sodium chloride[J].Corros.Sci.,1998,40(10):1769. |
| [5] | 朱立群,山丹丹,金燕等.镁合金表面Zn/Sn叠层的低温热扩散研究[J].材料热处理学报,2006,27(2):108. |
| [6] | 周婉秋,王晓民.韩恩厚等.镁合金上电镀锌的方法[P].CN:1804145,2006. |
| [7] | Song G L,Andrej Atrens.Corrosion mechanisms of magnesium alloys[J].Adv.Eng.Mater.,1999,1(1):11. |
| [8] | NIST X-ray Photoelectron Spectroscopy Database,Http://srdata.nist.gov/xps/index.htm,Accessed,2009. |
| [9] | Greef R,Peat R,Peter L M,et al.Instrumental Methods in Electrochemistry[M].Ellis Horwood,Chichester,1985. |
| [10] | Scharifker B,Hills G.Theoretical and experimental studies of multiple nucleation[J].Electrochim.Acta,1983,28(7):879. |
| [11] | Jafarian M,Mahjani M G,Gobal F,et al.Effect of potential on the early stage of nucleation and growth during aluminum electrocrystallization from molten.salt(AlCl3-NaCl-KCl)[J].J.Electroanal.Chem.,2006,588(2):190. |
| [12] | Bewick A,Fleischmann M,Thirsk H R.Kinetics of the electrocrystallization of thin films of calomel[J].Trans.Faraday Soc.,1962,(58):2200. |
| [13] | 查全性.电极过程动力学导论[M].北京:科学出版社,2002. |
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%