CAJ | 학술논문

采用电沉积方法制备具有整体纳米结构的黑镍镀层，并通过肉眼观察结合扫描电镜、X射线衍射等测试技术研究电沉积过程中的主要参数(电解液pH、搅拌速度、制备温度及电流密度)对镀层颜色及整体微观结构的影响。进一步采用动电位极化及电化学阻抗等电化学测量技术研究黑镍镀层在中性3.5%NaCl溶液中的腐蚀行为及腐蚀机理。结果表明：黑镍镀层的颜色变化趋势决定于电沉积制备参数的选择；通过优化本工艺制备的黑镍镀层平均粒径约为50 nm。对比了近似条件下制备的光亮镍镀层，发现黑镍镀层在耐蚀性方面具有较大优势。
채용전침적방법제비구유정체납미결구적흑얼도층，병통과육안관찰결합소묘전경、X사선연사등측시기술연구전침적과정중적주요삼수(전해액pH、교반속도、제비온도급전류밀도)대도층안색급정체미관결구적영향。진일보채용동전위겁화급전화학조항등전화학측량기술연구흑얼도층재중성3.5%NaCl용액중적부식행위급부식궤리。결과표명：흑얼도층적안색변화추세결정우전침적제비삼수적선택；통과우화본공예제비적흑얼도층평균립경약위50 nm。대비료근사조건하제비적광량얼도층，발현흑얼도층재내식성방면구유교대우세。
The electrodeposition and characterization of nano-structured black nickel coatings were presented. The influences of bath pH, electrodeposition time, stirring speed, temperature and current density on the color and microstructure of the electrodeposited nickel film were investigated through naked eyes, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Meanwhile, the corrosion resistance of the optimized black nickel film was evaluated by the polarization measurement and electrochemical impedance spectroscopy (EIS) in the neutral 3.5% NaCl solution. The results show that the color of the electrodeposited nickel film was highly dependent on the above technological parameters. The operating parameters were optimized mainly according to the color. The optimized black nickel film possesses nano-structure with an average grain diameter of about 50 nm. It also exhibits enhanced corrosion resistance when compared with white nickel coatings electrdodeposited under the same condition except the variation of the electroplating current density.