不同活化工艺对电解镍始极片结合力及性能的影响

发布时间：2018-03-15 03:29

本文选题：活化工艺　切入点：结合力　出处：《表面技术》2017年01期 　论文类型：期刊论文

【摘要】：目的为了提高电解镍始极片与基体的结合力,增加镀层耐蚀性能,改善镀层质量。方法通过采用不同的活化工艺对基体进行表面处理后制备镀层,采用划格法测试镀层与基体的结合力,用场发射电子扫描显微镜观察镀层与基体的截面形貌,用X射线衍射仪(XRD)分析镀层的相组成、应力以及镀层晶粒尺寸大小,用电化学工作站研究镀层的耐蚀性能。结果基体经过活化工艺处理后,镀层与基体结合均匀、致密、完整,大幅提高了镀层与基体的结合力,改善了镀层质量,镀层内应力由287.2 MPa降低到220.0 MPa,并且活化工艺不会给镀层引入其他杂质元素以及改变晶粒尺寸大小。电化学性能测试后发现,经过活化工艺后的镀层耐蚀性能增大,自腐蚀电位由-0.5481 V升高到-0.3980 V;自腐蚀电流密度由9.941μA/cm~2降低到2.927μA/cm~2。结论钛基体经过活化处理后,生成一层薄的活化膜,这层活化膜通过提高钛基体的表面活性,改变钛基体表面状态,来提高金属电沉积层与钛基体的结合强度,同时镀层的综合性能也得到了改善。
[Abstract]:Objective in order to improve the adhesion between electrolysis nickel electrode sheet and substrate, increase the corrosion resistance and improve the quality of the coating, the coating was prepared after surface treatment with different activation processes. The adhesion between the coating and the substrate was measured by grid method, the cross-section morphology of the coating and the substrate was observed by field emission electron scanning microscope, and the phase composition, stress and grain size of the coating were analyzed by X-ray diffractometer (XRD). The corrosion resistance of the coating was studied by electrochemical workstation. Results after the substrate was activated, the adhesion between the coating and the substrate was uniform, dense and complete, and the adhesion between the coating and the substrate was greatly improved, and the quality of the coating was improved. The internal stress of the coating was reduced from 287.2 MPa to 220.0 MPA, and the activation process did not introduce other impurity elements into the coating and change the grain size. After electrochemical performance test, it was found that the corrosion resistance of the coating increased after the activation process. The self-corrosion potential increased from -0.5481 V to -0.3980 V, and the corrosion current density decreased from 9.941 渭 A / cm ~ (2) to 2.927 渭 A / cm ~ (2). Conclusion after activation treatment, a thin active film is formed on titanium substrate, which can improve the surface activity of titanium substrate and change the surface state of titanium substrate. The bonding strength of the electrodeposition layer and titanium substrate was improved, and the comprehensive properties of the coating were also improved.
【作者单位】：南昌航空大学材料科学与工程学院;
【分类号】：TG174.44;TQ153.12

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