在锌浴中添加少量的Ni和V,获得了Zn-0.05%Ni-0.05%V镀层.研究了Zn-0.05%Ni-0.05%V镀层组织和在5%NaCl溶液浸泡过程中的腐蚀行为.结果表明:在Zn-0.05%Ni镀浴中添加0.05%V可以有效地抑制Fe-Zn反应,控制ζ相层的超厚生长.与Zn-0.05%Ni镀层相比,浸泡20min后,Zn-0.05%Ni-0.05%V电化学阻抗较大;浸泡2天时,该镀层表面氧化层发生破坏,阻抗急剧下降;浸泡8天后,腐蚀产物覆盖在镀层表面,阻抗图谱由两个容抗弧组成,低频区尾部出现Warburg扩散阻抗,并随着浸泡时间的延长,阻抗逐渐增大.根据腐蚀过程阻抗谱的变化特点,采用相应的等效电路拟合镀层在浸泡不同时间的电化学阻抗谱图,结果表明:浸泡8天后,腐蚀产物的电容Y1、弥散效应指数n1及扩散电阻WR逐渐减小,腐蚀产物电阻R1逐渐增大.腐蚀反应的双电层电容Y2和极化电阻R2无明显的规律性.
参考文献
| [1] | Marder AR. .The metallurgy of zinc-coated steel [Review][J].Progress in materials science,2000(3):191-271. |
| [2] | N. Pistofidis;G. Vourlias;S. Konidaris;E. Pavlidou;A. Stergiou;G. Stergioudis .Microstructure of zinc hot-dip galvanized coatings used for corrosion protection[J].Materials Letters,2006(6):786-789. |
| [3] | 许乔瑜,卢锦堂,陈锦虹,蒙继龙,孔纲,刘丽霞.活性钢热浸锌镍合金镀层工艺与性能[J].材料导报,2001(08):23-25. |
| [4] | N.C. Hosking;M.A. Stroem;P.H. Shipway;C.D. Rudd .Corrosion resistance of zinc-magnesium coated steel[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(9):3669-3695. |
| [5] | VERMA A R B .High-temperature batch hot-dip galvanizing.(Part 1):general description of coatings formed at 560 ℃[J].Surface and Coatings Technology,1997,89(1-2):132-142. |
| [6] | 于兴哲,宋月清,崔舜,李明,周晓华.钒基合金的研究现状和进展[J].材料开发与应用,2006(06):36-40. |
| [7] | 张杰,于振花,李焰.Zn-55%Al-Si合金镀层钢丝在海水中的耐蚀性能[J].材料研究学报,2008(04):347-352. |
| [8] | MA Hou-yi;CHEN Shen-hao;YIN Bing-sheng et al.Impendance spectroscopic study of corrosion inhibition of copper by surfactants in the acidic solution[J].Corrosion Science,2003,45(05):867-882. |
| [9] | M. A. Arenas;J. de Damborenea .Use of electrochemical impedance spectroscopy to Study corrosion of galvanised steel in 0-6M NaCl solution[J].Corrosion Engineering, Science and Technology,2006(3):228-234. |
| [10] | 李谋成,林海潮,曹楚南.碳钢在土壤中腐蚀的电化学阻抗谱特征[J].中国腐蚀与防护学报,2000(02):111-117. |
| [11] | HAMLAOUI Y;PEDRAZA F;TIFOUTI L .Corrosion monitoring of galvanized coatings through electrochemical impedance spectroscopy[J].Corrosion Science,2008,50:1558-1566. |
| [12] | F. Rosalbino;E. Angelini;D. Maccio;A. Saccone;S. Delfino .Application of EIS to assess the effect of rare earths small addition on the corrosion behaviour of Zn-5%Al (Galfan) alloy in neutral aerated sodium chloride solution[J].Electrochimica Acta,2009(4):1204-1209. |
| [13] | A. P. Yadav;A. Nishikata;T. Tsuru .Evaluation of impedance spectra of zinc and galvanised steel corroding under atmospheric environments[J].Corrosion Engineering, Science and Technology,2008(1):23-29. |
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%