目的 揭示试样的显微形貌随预化学镀镍时间的变化规律,并探讨试样的显微形貌、镀层的结合强度及耐蚀性能的相关性. 方法 以预化学镀镍时间为变量,通过化学沉积方法制得化学镀镍层. 采用扫描电镜观察预镀层及化学镀镍层的表面形貌,采用热震试验、弯曲试验和划格试验测试镀层的结合力,并对化学镀镍层与铝基体之间的结合力进行评价. 采用电化学方法对镀层在模拟燃料电池腐蚀介质中的耐蚀性进行评价. 结果 随着预化学镀镍时间的延长,颗粒尺寸不断增大,预化学镀镍层形貌先逐渐变得均匀、致密,之后又变得粗糙不均匀. 化学镀镍层的耐蚀性以及与基体的结合力呈现出先增加后降低的趋势. 结论 预化学镀镍时间在5 min时,所得化学镀镍层的表面形貌最平整,结合力最好,耐蚀性最佳.
Objective To reveal the variation trend of surface morphology of the sample along with the different pre-plating time and discuss the correlations between surface morphology, adhesion of coatings with aluminum matrix, and corrosion resistance. Methods Electroless nickel coatings were prepared by chemical deposition at different pre-plating time. The surface morphology of coatings was characterized by SEM. The adhesion of coatings with aluminum matrix was determined and evaluated by bending test, thermal shock test and scribe test. And the corrosion resistance of coatings in a simulated fuel cell corrosion medium was also cha-racterized by the electrochemical workstation. Results With the electroless nickel pre-plating time increasing,the surface morphology of pre-plating nickel coating gradually became dense and uniform. And the particle size of pre-plating coating became bigger. Elec-troless nickel coating first became smooth and then rough,and its corrosion resistance and adhesion with matrix also first increased and then decreased with the electroless nickel pre-plating time increasing. Conclusion The best surface morphology,corrosion re-sistance and the maximum adhesion of the coating was obtained at 5 min of electroless nickel pre-plating time.
参考文献
| [1] | K. HARI KRISHNAN;S. JOHN;K.N. SRINIVASAN.An Overall Aspect of Electroless Ni-P Depositions-A Review Article[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20066(6):1917-1926. |
| [2] | Ching-Yuan Bai;Yu-Hsien Chou;Chu-Lung Chao;Shuo-Jen Lee;Ming-Der Ger.Surface Modifications Of Aluminum Alloy 5052 For Bipolar Plates Using An Electroless Deposition Process[J].Journal of Power Sources,20081(1):174-181. |
| [3] | 李立明;胡文彬;罗守福;沈彬.难镀基材化学镀镍[J].电镀与环保,2002(3):13-17. |
| [4] | Makoto Hino;Koji Murakami;Yutaka Mitooka.Effect of Zincate Treatment on Adhesion of Electroless Ni-P Coating onto Various Aluminum Alloys[J].Materials transactions,20099(9):2235-2241. |
| [5] | 尹国光;潘小芳;陈延民;胡东红.铝合金化学镀镍工艺研究[J].材料保护,2004(1):30-32. |
| [6] | 孙华;马洪芳;刘科高;刘义.铝合金化学镀Ni-P前处理工艺条件的优化[J].表面技术,2010(1):67-70. |
| [7] | 陈明辉,杨丽坤,傅锴铭,杨防祖,田中群,周绍民.铝表面化学镀镍工艺研究[C].2013年海峡两岸(上海)电子电镀及表面处理学术交流会论文集,2013:236-241. |
| [8] | 赵婉惠.铝件直接化学镀镍前处理新工艺[C].2005'(贵阳)表面工程技术创新研讨会论文集（2005(贵阳)表面工程技术创新研讨会）,2005:132-133. |
| [9] | Yin, Z.;Chen, F..Effect of nickel immersion pretreatment on the corrosion performance of electroless deposited Ni-P alloys on aluminum[J].Surface & Coatings Technology,2013:34-40. |
| [10] | 郝龙;冯全芬;沈伟;林安;甘复兴.前处理对不锈钢表面化学镀Ni-P镀层结合力影响的研究[J].材料保护,2008(3):25-27. |
| [11] | 金永中;杨奎;曾宪光;倪涛;丁松.温度对化学镀Ni-P合金层形貌、硬度及耐蚀性的影响[J].表面技术,2015(4):23-26,31. |
| [12] | 王天旭;蒙继龙;李子全.化学镀Ni-P镀层的生长机理研究[J].材料保护,2007(12):4-6. |
| [13] | 杨丽坤;杨防祖;田中群;周绍民.铝表面前处理及化学沉积镍初期行为[J].物理化学学报,2012(2):414-420. |
| [14] | 胡永俊;熊玲;蒙继龙;李风;成晓玲.铝合金的前处理对Ni-Co-P化学镀层沉积特性和耐腐蚀性能的影响[J].腐蚀科学与防护技术,2009(2):194-196. |
| [15] | 刘丽红;张子华;闫杰;苏少燕.化学镀镍磷合金在海洋环境中的腐蚀行为[J].中国腐蚀与防护学报,2010(5):369-373. |
| [16] | 胡光辉;吴辉煌;杨防祖.镍磷化学镀层的耐蚀性及其与磷含量的关系[J].物理化学学报,2005(11):1299-1302. |
| [17] | 李国华;郝建民;陈永楠;陈宏.温度对AZ91D镁合金化学镀镍层结构和耐蚀性能的影响[J].铸造技术,2014(2):305-308. |
| [18] | 尹国光.铝合金化学镀镍预处理新工艺[J].表面技术,2004(02):43-45. |
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