为深入了解碱性锌酸盐体系的工艺参数对锌镍合金镀层结构和耐蚀性的影响，在以四乙烯五胺（ TEPA）为镍离子主络合剂、三乙醇胺（ TEA）为辅助络合剂的碱性镀液中电沉积制备了锌镍合金镀层，利用电子能谱、X射线衍射、极化曲线和电化学阻抗谱等方法表征镀层的组成结构和在氯化钠溶液中的耐腐蚀性．结果表明：镀层含镍原子数分数11．54％～20．12％，为γ－Ni2 Zn11＋纯Zn两相结构（低含镍原子数分数时）或单一γ相结构（较高含镍原子数分数时），γ相晶粒在（600）方向上具有不同程度的择优取向性；随着镀液中镍原子数分数的提高，镀层的腐蚀电位正移，阻抗增加，耐蚀性提高；当电流密度为2 A／dm2时，镀层的腐蚀电位和电荷传递电阻最高，耐蚀性最好．
To know how the technological parameters affect the structure and anti?corrosion property of Zinc?nickel alloy plating in alkaline zincate system, the synthesis of the zinc?nickel alloy plating is made by the electrochemical deposition method. The alkaline solution is a mixture of Tetraethylenepentamine ( TEPA) and Triethanolamine ( TEA ) , and the prior part is the main complexing agent for nickel ions. The energy dispersive spectrometer ( EDS ) , X?ray diffraction ( XRD ) associated with polarization curves and electrochemical impedance spectroscopy ( EIS ) were used to characterize the structure and anti?corrosion property respectively. The result shows that the particles inγ?phase preferred (600) orientation with respect to the atom percentage of nickel varies between 11.54% and 20.12%, 11.54% corresponds to aγ?Ni2 Zn11 and Zn two?phase area and 20.12% corresponds to a single γ?phase. With an increasing atom percentage of nickel in the bath, the corrosion potential of plating becomes more positive, which results in an increasing impedance and a better anti?corrosion property. At last, the plating displays its highest corrosion resistance when the current density reaches 2 A/dm2 .
参考文献
| [1] | HAMMAMI O, DHOUIBI L, TRIKI E. Influence of Zn-Ni alloy electrodeposition techniques on the coating corrosion behaviour in chloride solution [J].Surface and Coatings Technology, 2009, 203(19):2863-2870.,2009. |
| [2] | BYK T V, GAEVSKAYA T V, TSYBULSKAYA L S. Effect of electrodeposition conditions on the composi-tion, microstructure, and corrosion resistance of Zn-Ni alloy coatings [J]. Surface and Coatings Tech-nology, 2008, 202(24):5817-5823.,2008. |
| [3] | WYKPIS K, POPCZYK M, BUDNIOK A. Electrolytic deposition and corrosion resistance of Zn-Ni coatings obtained from sulphate-chloride bath [J]. Bulletin of Materials Science, 2011, 34(4):997-1001.,2011. |
| [4] | 曹浪,左正忠,田志斌,詹益腾.电镀锌镍合金的研究现状与展望[J].材料保护,2010(04):33-37,50. |
| [5] | 黄攀,裴和中,张国亮,龙晋明.碱性锌镍合金电镀的研究现状及展望[J].热加工工艺,2012(02):161-164. |
| [6] | MOSAVAT S H, SHARIAT M H, BAHROLOLOOM M E. Study of corrosion performance of electrodeposit-ed nanocrystalline Zn-Ni alloy coatings [J]. Corrosion Science, 2012, 59:81-87.,2012. |
| [7] | WYKPIS K, POPCZYK M, NIEDBAŁA J, et al. Influence of thermal treatment on the corrosion resistance of electrolytic Zn-Ni coatings [J].Materials Science-Poland, 2011, 29(3):177-183.,2011. |
| [8] | YOGESHA S, HEGDE A C. Optimization of bright zinc-nickel alloy bath for better corrosion resistance [J]. Transactions of the Indian Institute of Metals, 2010, 63 (6):841-846.,2010. |
| [9] | 田伟,吴向清,谢发勤.Zn-Ni合金电镀的研究进展[J].材料保护,2004(04):26-29. |
| [10] | QIAO Xiaoping, LI Helin, ZHAO Wenzhen, et al. Effects of deposition temperature on electrodeposition of zinc-nickel alloy coatings [J]. Electrochimica Acta, 2013, 89:771-777.,2013. |
| [11] | RAVINDRAN V, MURALIDHARAN V S. Character-ization of zinc-nickel alloy electrodeposits obtained from sulphamate bath containing substituted aldehydes [J]. Bulletin of Materials Science, 2006, 29 (3):293-301.,2006. |
| [12] | De OLIVEIRA E M, CARLOS I A. Study of the effect of mannitol on ZnNi alloy electrodeposition from acid baths and on the morphology, composition, and structure of the deposit [J]. Journal of Applied Electrochemistry, 2009, 39 (10):1849-1856.,2009. |
| [13] | 杨防祖.锌镍合金镀层的组成与相结构的关系[J].厦门大学学报,1994(01):63. |
| [14] | MÜLLE C, SARRET M. Complexing agents for a Zn-Ni alkaline bath [J]. Journal of Electroanalytical Chemistry,2002, 519 (1/2):85-92.,2002. |
| [15] | 王英华. X光衍射技术基础 [M]. 北京:原子能出版社,1993:230-262.,1993. |
| [16] | 周绍民. 金属电沉积---原理与研究方法 [M]. 上海:上海科学技术出版社, 1987, 437.,1987. |
| [17] | 长崎诚三, 平林真, 刘安生. 二元合金状态图集[M].北京:冶金工业出版社, 2004:240.,2004. |
| [18] | DESLOUIS C, TRIBOLLER B, MENGOLI G. Electro-chemical behavior of copper in mentral aerated chloride solutionⅠ:steady-state investigation [J]. Journal of Applied Electrochemistry, 1988, 18(3):374-383.,1988. |
| [19] | 鹿文珊,徐天凤,陈宇,张昭,张鉴清.碱性电镀锌镍合金的研究[J].中国腐蚀与防护学报,2012(06):443-448,454. |
| [20] | 屠振密. 电镀合金原理与工艺[M]. 北京:国防工业出版社,1993:207-213.,1993. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%