采用光学显微镜、电化学测试、SEM等方法研究了Zn-4Al,Zn-5Al和Zn-6Al热浸镀锌合金的显微组织和耐蚀性.结果表明,Zn-4Al合金由Zn-Al层片状共晶组织和大量的初生β-Zn相枝晶组成,Zn-5Al合金为Zn-Al共晶组织加少量的初生β-Zn相组成,Zn-6Al合金为初生的块状α-Al相和Zn-Al共晶组织组成,块状α-Al相周围的共晶组织多为颗粒状.Zn-5Al合金的自腐蚀电流密度Jcorr最小,极化电阻Rp最大,合金表现出最好的耐腐蚀性.Zn-4Al和Zn-5Al合金是由初生的β-Zn相被优先选择腐蚀,Zr-6Al合金是由块状的α-A1相周围的共晶组织被优先选择腐蚀.
参考文献
| [1] | 田伟,谢发勤,吴向清.锌镍合金镀层耐蚀性研究[J].腐蚀与防护,2006(11):552-554. |
| [2] | F. Rosalbino;E. Angelini;D. Maccio;A. Saccone;S. Delfino .Influence of rare earths addition on the corrosion behaviour of Zn-5%Al (Galfan) alloy in neutral aerated sodium sulphate solution[J].Electrochimica Acta,2007(24):7107-7114. |
| [3] | 朱铄金,朱丽慧,刘茜,刘庆峰,王利.热浸镀锌合金技术的研究现状[J].热处理,2008(03):20-23. |
| [4] | 杨付双,倪锋.非平衡凝固条件下Zn-5Al合金的组织形成[J].热加工工艺,2007(01):17-19. |
| [5] | Shih HC.;Hsu JW.;Sun CN.;Chung SC. .The lifetime assessment of hot-dip 5% Al-Zn coatings in chloride environments[J].Surface & Coatings Technology,2002(1):70-75. |
| [6] | R. G. Buchheit;M. Cunninghan;H. Jensen;M. W. Kendig;M. A. Martinez .A correlation between salt spray and electrochemical impedance spectroscopy test results for conversion-coated aluminum alloys[J].Corrosion: The Journal of Science and Engineering,1998(1):61-72. |
| [7] | Xhoffer C;De Cooman BC;Hubin A;Dillen H .Quantitative phase analysis of galvannealed coatings by coulometric stripping[J].Journal of Applied Electrochemistry,1999(2):209-219. |
| [8] | R.M. Souto;L. Fernandez-Merida;S. Gonzalez;D.J. Scantlebury .Comparative EIS study of different Zn-based intermediate metallic layers in coil-coated steels[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(5):1182-1192. |
| [9] | Y. Hamlaoui;F. Pedraza;L. Tifouti .Corrosion monitoring of galvanised coatings through electrochemical impedance spectroscopy[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(6):1558-1566. |
| [10] | 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. |
| [11] | Influence of steel gauge on the microstructure and corrosion performance of zinc alloy coated steels[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(5):p.1853. |
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%