预化学镀镍时间对铝基化学镀镍层性能的影响

发布时间：2019-03-29 18:03

【摘要】：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。
[Abstract]:Aim to reveal the variation of the microstructure of the sample with the time of pre-electroless nickel plating, and to explore the correlation between the microstructure of the sample, the bonding strength and the corrosion resistance of the coating. Methods Electroless nickel plating layer was prepared by chemical deposition with prechemical nickel plating time as variable. The surface morphology of the pre-coating and electroless nickel coating was observed by scanning electron microscope. The adhesion strength of the coating was tested by thermal shock test, bending test and striping test, and the adhesion force between the electroless nickel coating and aluminum substrate was evaluated. The corrosion resistance of coating in simulated fuel cell corrosion medium was evaluated by electrochemical method. Results with the prolongation of the pre-electroless nickel plating time, the particle size increased, and the morphology of the pre-electroless nickel plating layer gradually became uniform, dense, and then rough and uneven. The corrosion resistance of electroless nickel plating layer and the adhesion of electroless nickel coating to matrix show a tendency of increasing first and then decreasing. Conclusion when the pre-electroless nickel plating time is 5 min, the surface morphology, adhesion and corrosion resistance of the electroless nickel plating layer are the most smooth, the best adhesion and the best corrosion resistance.
【作者单位】：沈阳工业大学理学院;
【基金】：辽宁省教育厅科研项目(L2015392) 2015年辽宁省大学生创新创业训练计划项目(201510142000055) 国家科技基础条件平台建设项目(2005DKA10400-15-Z04)~~
【分类号】：TG174.4

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