【作者】 刘家琴； 吴玉程； 舒霞； 史成武； 李云； 李广海； 张立德；

【Author】 Liu Jiaqin Wu Yucheng Shu Xia Shi Chengwu Li Yun Li Guanghai Zhang Lide (School of Material Science and Engineering, Hefei University of Technology, Hefei, 230009; School of Chemistry Engineering, Hefei University of Technology, Hefei,230009; Institute of Solid State Physics, Chinese Academy of Sciences, Hefei,230031)

【机构】 合肥工业大学材料学院； 合肥工业大学化工学院； 中国科学研究院固体物理研究所；

【摘要】 本文通过电沉积方法制备Ni-W合金纳米晶,采用正交实验方法和极差分析设计实验和处理数据来研究钨酸钠浓度、电流密度、镀液pH值、温度等工艺参数对Ni-W合金沉积速率、显微硬度、镀层表面质量的综合影响。结果表明:通过控制钨酸钠浓度,可获得不同尺度的Ni-W合金纳米晶;随着电流密度增加,镀层的沉积速率和显微硬度提高;镀液的pH值对电沉积Ni-W合金的沉积速率和显微硬度以及镀层外观的影响最大,适宜的镀液为中性或微酸性镀液;从镀层沉积速率和表面质量等综合考虑,最佳沉积温度应控制在60～70℃。Ni-W合金纳米晶镀层具有良好的抗腐蚀性能,可与Cr镀层相当。更多还原

【Abstract】 Ni-W alloy nanocrystalline was prepared by Electrodeposition method in this paper. The combined effect of concentration of sodium tungstate, current density, pH value and bath temperature on deposition rate, microhardness and surface quality of the Ni-W alloy nanocrystalline coatings were investigated by quadrature experimental and range analysis. The results indicated that Ni-W alloy nanocrystalline with different size could be obtained by changing the concentration of sodium tungstate. With increase in the current density, the deposition rate and microhardness of the coatings raised. Among the technological parameters, pH value affected the deposition of the Ni-W alloy nanocrystalline coatings most severely and the optimal bath showed neutrality or subacidity. The deposition temperature should be controlled from 60℃to 70℃. Ni-W alloy nanocrystalline coatings possessed higher anticorrosion properties and could be equivalent to Cr.更多还原