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›› 2010, Vol. 10 ›› Issue (5): 987-992.

• 材料工程专栏 • Previous Articles     Next Articles

Effect of Composite Additives on Zinc Electrodeposition from Zinc Sulfate Electrolyte Containing Magnesium Ions

TIAN Lin， XIE Gang， YU Xiao-hua LI Rong-xing LI Shang-yong，   

  1. The Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology The Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology The Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology
  • Received:2010-07-14 Revised:2010-09-10 Online:2010-10-20 Published:2010-10-20

复合添加剂对含镁硫酸锌电积锌的影响

田林 谢刚 俞小花 李荣兴 李尚勇   

  1. 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学材料与冶金工程学院 昆明理工大学材料与冶金工程学院

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Abstract: Composite additives A1 (gelatin+thiourea+cresol) and A2 (gelatin+thiourea+sodium dodecyl sulfonate) were synthesized on zinc sulfate electrolyte containing magnesium ions through zinc electrodepositon experiments. The results show that A2 is superior to A1, which has a good effect on zinc sulfate electrolyte at low concentration of magnesium ions (Mg2+<15 g/L) with current efficiency increase by 1%~2% and power consumption decrease by 100~200 kW×h/t. And its optimum concentration of 15 mg/L is determined. But, the effect of A2 on zinc electrodeposition is not ideal at high concentration of magnesium ions (Mg2+>15 g/L) of zinc sulfate electrolyte. It is found that A2 makes zinc surface more compact and smooth, branch crystals and holes are decreased through scanning electron microscope analysis. Finally, the effects of A2 on cathodic polarization on zinc sulfate electrolyte in the presence of magnesium ions were carried out and its action mechanism was studied.

Key words: zinc electrodepositon, magnesium ions, additive, polarization curve

摘要： 通过电沉积锌实验，针对含镁硫酸锌电积液合成出了2种复合添加剂A1(明胶+硫脲+甲酚)和A2(明胶+硫脲+十二烷基磺酸钠). 结果表明，A2对硫酸锌电积锌的沉积效果优于A1，其使低镁(Mg2+<15 g/L)硫酸锌电积锌电流效率提高1%~2%，电能消耗则降低28~78 kW×h/t，A2最佳使用量为15 mg/L. 而对高镁(Mg2+>15 g/L)硫酸锌沉积效果则不理想. 扫描电镜分析表明，A2明显使电锌的表面更致密光滑，减少了支晶和孔洞. 在复合添加剂A2作用下，得到了含镁硫酸锌电积锌的阴极极化曲线，并研究了其作用机理.

关键词: 电沉积锌, 镁离子, 添加剂, 极化曲线

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