真空沸腾电沉积阴极计时电位和极间电阻研究

Research on cathode chronopotentiograms and interelectrode resistance during vacuum boiling electrodeposition

为探索电解液真空沸腾电沉积工艺能显著改善沉积层表面质量和微观组织结构的原因,分析了电解液真空沸腾电沉积镍时的阴极电位和极间电阻与真空度、阴极温度等两个核心工艺参数间的关联特性。实验结果表明,阴极计时电位和极间电阻都严重受真空度与阴极温度影响,降低真空度和阴极面温度均会减小阴极计时电位,导致阴极极化度增大,从而改善沉积面表面质量和微观组织织构。

In order to explore the reason that the electrolyte vacuum boiling electrodeposition process can significantly improve the surface quality and microstructures of deposited layers. This paper mainly focused on analyzing the correlated characteristics between cathode potential,electrode resistance and vacuum degree,cathode temperature when electrolyte is vacuum boiling. Experimental results showed that： the vacuum degree and the cathode surface temperature can significantly affect the cathode chronopotentiometry and interelectrode resistance; decreasing the vacuum degree and the cathode surface temperature cause the cathode chronopotentiometry down,resulting in the cathode polarization degree increased,thereby improving the deposition surface quality and microstructure.