在铝合金牺牲阳极中添加Mg、Ti、Nb等合金元素,研究它们的含量与存在形式对牺牲阳极性能的影响,分析第二相、晶粒细化等的作用和影响.结果表明:在所讨论的含Mg铝合金牺牲阳极中,会形成一定类型的第二相,进而影响牺牲阳极的电化学性能;理想的Mg含量为2%;加入微量Ti、Nb可以有效细化晶粒,对提高牺牲阳极的电流效率有很好的促进作用,而且单独加入Ti要比同时加Ti、Nb的效果好.
Some elements such as Mg,Ti,Nb were added in Al alloy sacrificial anodes.The effects of these elements and correlated second phases on the properties of the anodes were investigated.In the studied anodes,Mg has two existing states which are solid solution and second phase separately.For the second phase,there are T-phase(Al_2Mg_3Zn_3)and η-phase(MgZn_2),which are anodic and dissolve preferentially related to the anode matrix in the chloride solution.The effects of some factors on the electrochemical properties and solubility behavior of anodes were discussed,which include the category,morphology,quantity and distribution of the second phases.The results confirmed that the homogeneous distribution,regular shape and proper quantity of second phases are beneficial to get best anode efficiency and surface dissolved state.The ideal content of Mg is about 2% in all studied anode,at which the anode efficiency would be close to 90%.In this paper,the effects of trace Ti,Nb were discussed.The trace Ti,Nb is useful to get more fine grain microstructure and bigger anode efficiency,and the effect of independent Ti is better than that of Ti and Nb simultaneously.But for the anode surface dissolved state,the more fine grain microstructure was not corresponding to more uniform surface dissolution;because the trace Ti,Nb would cause the change of distribution,shape and quantity of second phases.
参考文献
| [1] | A. Venugopal;R.D. Angal;V.S. Raja .Effect of Grain-Boundary Corrosion on Impedance Characteristics of an Aluminum-Zinc-Indium Alloy in 3.5 percent Sodium Chloride Solution[J].Corrosion: The Journal of Science and Engineering,1996(2):138-142. |
| [2] | 孔小东,朱梅五,丁振斌,郑家燊.铝合金牺牲阳极研究进展[J].稀有金属,2003(03):376-381. |
| [3] | 丁振斌,孔小东,朱梅五.不同镁含量铝基牺牲阳极材料的组织与性能研究[J].材料保护,2004(05):50-51. |
| [4] | 宋玉苏,张燕,周立清.强碱性介质铝阳极析氢影响因素研究[J].中国腐蚀与防护学报,2006(04):237-240. |
| [5] | 李振亚,秦学,余远彬,陈艳英,易玲,杨林.含镓、锡的铝合金在碱性溶液中的阳极行为[J].物理化学学报,1999(04):381. |
| [6] | 任建军,左禹.铝阳极氧化膜的蚀孔形貌与蚀孔生长机理研究[J].中国腐蚀与防护学报,2003(04):198-201. |
| [7] | 李振亚,易玲,刘稚蕙,杨林,苏景新.卤离子对Al-Sn-Ga合金阳极的活化作用[J].应用化学,2001(12):983-986. |
| [8] | 张盈盈,齐公台,刘斌,刘汶峰.Al-Ga-Mg合金组织与阳极性能研究[J].中国腐蚀与防护学报,2005(06):336-339. |
| [9] | 徐宏妍,李延斌.铝基牺牲阳极在海水中的活化行为[J].中国腐蚀与防护学报,2008(03):186-192. |
| [10] | 廖海星,齐公台,喻克雄.固溶处理对含RE铝牺牲阳极组织与性能的影响[J].材料热处理学报,2004(03):54-56. |
| [11] | 祁洪飞,梁广川,李国禄,梁金生,孟军平.均匀化退火对铝合金阳极活化性能的影响[J].材料工程,2005(10):27-30. |
| [12] | 齐公台,郭稚弧,屈钧娥.合金元素Mg对含RE铝阳极组织与性能的影响[J].中国腐蚀与防护学报,2001(04):220-224. |
| [13] | 侯军才,关绍康,任晨星,徐河,房中学,赵彦学.微量锶对镁锰牺牲阳极显微组织和电化学性能的影响[J].中国腐蚀与防护学报,2006(03):166-170. |
| [14] | 齐公台,廖海星,屈钧娥.含RE铝阳极中析出相的电化学行为研究[J].中国腐蚀与防护学报,2003(06):355-358. |
| [15] | 齐公台.不同稀土含量的铝合金牺牲阳极的显微组织研究[J].腐蚀科学与防护技术,1998(01):17. |
| [16] | Liou Y.M.;Chung S.C. .Current efficiency distribution in aluminium anode metallurgical and electrochemical studies[J].Corrosion Prevention & Control,2000(2):57-61. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%